Whole House Reverse Osmosis System Maintenance, the Practical Version
A whole house reverse osmosis system runs on a different rhythm than the under-sink unit most articles describe. It treats every gallon entering the home, sits in an equipment room or basement, and runs nearly nonstop. That changes everything about how you maintain it.
This guide walks through the actual schedule, the components that need attention, and the parts that quietly go wrong if you ignore them. It is written for Crystal Quest whole house RO owners, but the principles apply to any large-format whole house reverse osmosis water filtration system built around parallel membranes, a booster pump, and an atmospheric storage tank. The treatment context here is residential point-of-entry filtration, downstream of regulated public supply under the EPA Safe Drinking Water Act or private-well guidance. For the broader RO maintenance framework across point-of-use and whole-house systems, use the complete reverse osmosis maintenance guide; this page stays focused on whole-house equipment rooms and atmospheric storage.
The shortest version of the answer: pre-filters every 12 to 24 months, membranes every 2 to 3 years, full sanitization once a year, and a five minute walkthrough every week to catch the things that get expensive when you don't.
Key Takeaways
Two-Tier Schedule
Replace Membranes as a Set
Sanitize the Tank Annually
Five Minutes a Week Pays for Itself
Understanding Your Whole House RO System
You can't maintain what you don't know is in the equipment room. So before the schedules, a quick map of the system.
A whole house reverse osmosis water filter system pushes feed water through three stages of pre-treatment, into a parallel array of RO membranes housed in reinforced pressure vessels, out to an atmospheric storage tank, and finally through a re-pressurization pump to the rest of the home's plumbing. A Crystal Quest whole house RO system runs anywhere from 300 to 7,000+ gallons per day (GPD) depending on the household, with most residential installations sitting in the 500 to 2,500 GPD range.
The pre-treatment array is what protects the expensive part. Every Crystal Quest whole house RO ships with integrated pre-filtration in 20" Big Blue housings: a pleated sediment cartridge, the proprietary SMART multimedia carbon, and on systems rated 300, 400, or 4,000 to 7,000 GPD, an additional carbon block. Chlorine destroys the polyamide membrane in hours, sediment fouls it in weeks, so the pre-filters are not optional.
Sitting downstream of the pre-filters are one to four high-capacity membranes operating at 150 to 250 pounds per square inch (PSI). A high-pressure booster pump provides that pressure. The system can't run on line pressure alone, which is one of the structural differences between whole house and point-of-use RO. Treated water (the permeate) flows into the storage tank. The rejected water (concentrate) goes to drain.
From the tank, a re-pressurization pump pushes treated water back into the home's distribution lines. Most Crystal Quest whole house RO systems include float switches on the storage tank to prevent overflow, and many add an optional remineralization filter downstream of the tank to raise pH and protect copper plumbing from acidic RO water. A UV sterilizer sometimes appears as the final stage, especially on well-water installations or homes with immunocompromised residents.
Knowing which of those pieces your system actually has determines the schedule below. If you don't have an anti-scalant pump, you skip that line item. If you don't have a softener upstream, you watch hardness closer.
Maintenance readiness checklist
Check these before you open a housing, schedule service, or decide a membrane has failed.
- Confirm the feed-water sourceMunicipal water, private well water, or a blended source changes pre-treatment risk.
- Record healthy pressure readingsFeed pressure, pump pressure, and permeate pressure give you a baseline.
- Measure faucet TDSA current reading helps separate membrane trouble from normal cartridge aging.
- Locate shutoffs and bypassesKnow how to isolate the RO, tank, membrane array, and downstream filters before service.
- Match parts to the system specMembrane class, Big Blue cartridges, UV bulb size, and remineralizer format must match the installed system.
Enough inputs are ready to plan the maintenance order.
Confirm parts with supportIf you're looking for the under-sink or countertop version of this guide, head to the point-of-use RO maintenance guide. The two systems share the same physics but run on completely different schedules. Cartridges and pump types differ enough that mixing them in one guide costs accuracy.
Whole House RO Maintenance Schedule
Use this as a wall reference. Every component runs on its own cadence. The single biggest mistake homeowners make is treating the whole system as one cycle.
| Task | Frequency | Time | Priority |
|---|---|---|---|
| Walk the equipment room. Check pressure gauges, listen to the pump, look for leaks. | Weekly | ~10 min | Critical |
| Test TDS at the faucet. Tracks membrane rejection. A rise points to membrane or pre-filter trouble. | Monthly | ~5 min | High |
| Replace 20" Big Blue pre-filters. Sediment, SMART carbon, and carbon block (when fitted). | Every 12 to 24 months (avg 18) | ~1 hr | Critical |
| Replace RO membranes. Swap the whole array together. | Every 2 to 3 years (avg 2.5) | 3 to 4 hr | Critical |
| Clean-in-Place (CIP) membrane cleaning. Triggered by performance drop. | As needed | 4 to 6 hr | Medium |
| Sanitize the system. Atmospheric tank, lines, and downstream plumbing. | Annual | 4 to 6 hr | High |
| Booster pump service. Inspect seals, bearings, and check valves. | Every 6 months | ~2 hr | High |
| Replace remineralization filter (if installed). Watch for pH or taste drift. | Every 12 to 24 months | ~30 min | High |
| Professional inspection. Performance test, recovery rate, fine-tuning. | Annual | 2 to 3 hr | Recommended |
The two cycles that get conflated most often are the pre-filter cycle (12 to 24 months) and the membrane cycle (2 to 3 years). They're not the same. Big Blue cartridges sit at the front of the system absorbing the full load of chlorine and sediment, so they wear out about three times faster than the membrane they protect.
Maintenance cadence by interval
Move through the routine by how often each check belongs on the calendar.
Step 1 - Weekly
Walk the equipment room, listen to the pump, check gauges, and look for leaks before they become expensive.
Weekly System Monitoring
This is the part that pays for itself. A ten minute walk through the equipment room every week catches the small things before they turn into pump rebuilds or floor flooding. Three things to check, in order.
Pressure Gauges
A whole house RO system has at least three pressure points worth watching. Note the readings the first week your system is healthy. Every week after that, you're comparing against your own baseline.
- Feed pressure: should sit between 45 and 60 PSI. Below 45 usually means a fouling pre-filter or a problem upstream.
- Pump pressure: typically 150 to 250 PSI for freshwater membranes. A drop here points to a scaling membrane or a wearing pump.
- Permeate pressure: usually 20 to 40 PSI on the clean side. Big swings can indicate a stuck float in the storage tank.
Any reading more than 10 PSI off your baseline deserves a closer look that same day.
Flow and Pump Sounds
Check the flow meter. A 1,000 GPD system should produce roughly 42 gallons per hour at steady state. If you don't have a flow meter, time how long the tank takes to refill from a known half-full state. A gradual decline (week over week) usually means the membrane is fouling or a pre-filter is clogging.
Listen to the booster pump while it runs. Healthy pumps hum. Grinding, squealing, or vibration almost always traces back to failing bearings, cavitation, or air in the line. The sound shows up weeks before the failure does, which is why this check is worth doing every week instead of every month.
Walk the Plumbing
Look around the membrane housings, the pump body, and the fittings at the storage tank. A whole house RO operates at 150 to 250 PSI on the high-pressure side. Even a hairline weep there can escalate to a hose burst in days. Catching it on Sunday morning costs less than catching it Monday afternoon when nobody is home.
Install a water meter on the RO output line. It logs your daily production silently and a sudden drop is usually the first symptom of membrane fouling or pump weakness, often weeks before you'd notice from taste or flow.
Filter Replacement and Pre-Treatment Components
Every Crystal Quest whole house RO system ships with two or three integrated pre-filters in 20" Big Blue housings. Their job is to take the chlorine and sediment hit so the membrane doesn't have to. They are the highest-abuse, shortest-cycle component in the system.
Standard Pre-Filter Stack
Most Crystal Quest systems use a two-stage pre-filtration stack:
- Pleated sediment cartridge: catches dirt, sand, and suspended particles that would otherwise foul or scratch the membrane.
- SMART multimedia cartridge: a multi-stage media designed to reduce chlorine, chloramines, heavy metals, pesticides, and volatile organic compounds (VOCs) before they reach the membrane.
Systems rated 300, 400, or 4,000 to 7,000 GPD add a third stage:
- Carbon block cartridge: a denser carbon polishing stage that handles chlorine residual and organic contaminants. Thin-film composite membranes are intolerant of free chlorine, so on higher-capacity systems the extra polish is real protection, not redundancy.
The cartridges look identical across capacities, but the housings scale up as GPD rises. A 300 GPD system uses smaller housings than a 5,000 GPD system, which means a bigger surface area but the same 12 to 24 month service cycle. Don't reach for the same replacement filter you used on the under-sink.
Optional Pre-Treatment
Upstream treatment is prescribed from a water test, not added by default. Start with a water test, then separate hardness from dissolved solids using the TDS vs hardness guide. If scale is the concern, the hard water guide explains why a softener protects the membrane.
Water Softener
Use When: Hardness is above about 7 grains per gallon (120 ppm) or scale is already appearing on fixtures and valves.
Maintenance: Check salt weekly and clean the brine tank annually. See the water softener maintenance guide.
Chemical Dosing System
Use When: Silica, aggressive chlorination, or scaling risk requires anti-scalant, dechlorination, or pH adjustment before the membrane.
Maintenance: Check solution level, dosing rate, and injection point on the schedule set at install.
Iron and Manganese Filter
Use When: Well water shows staining, metallic taste, rotten-egg odor, or measured iron above 0.3 ppm.
Maintenance: Keep the backwash schedule current and replace media when performance declines.
Post-Treatment Components
Two components sit downstream of the membrane.
A Remineralization filter (sometimes branded as a Remineralizing filter) raises pH and alkalinity after the membrane, putting calcium and magnesium back into the permeate. Reverse osmosis water is mildly acidic, which over years can pit copper plumbing. A remineralizer pH-corrects the water before it enters the distribution lines. On Crystal Quest whole house RO, this is a 20" Big Blue housing cartridge running on the same 12 to 24 month cycle as the pre-filters. It is a different form factor than the inline remineralizer on a point-of-use RO, and the cycles are not interchangeable.
A UV sterilizer adds a final pass through germicidal UV-C light, killing any bacteria or viruses that survive the membrane or enter through the atmospheric tank's vent. UV bulbs lose germicidal output even when they still appear lit, so they get replaced annually whether they look done or not. Quartz sleeves get a quarterly wipe with isopropyl alcohol to prevent mineral haze from blocking the light.
Component Replacement Schedule
| Component | Cycle | Replace When |
|---|---|---|
| Pleated sediment (20" Big Blue) | 12 to 24 months (avg 18) | Visible discoloration or flow drop |
| SMART multimedia (20" Big Blue) | 12 to 24 months (avg 18) | Reduced flow or taste breakthrough |
| Carbon block (20" Big Blue) | 12 to 24 months (avg 18) | Chlorine detected on test strip downstream |
| RO membranes (parallel array) | 2 to 3 years (avg 2.5) | TDS rejection below 90% or calendar |
| Remineralization filter (20" Big Blue) | 12 to 24 months | pH drop or taste change |
| UV sterilizer bulb | 12 months | Annually, regardless of visible light |
| Water softener resin (if installed) | 10 to 15 years | Reduced softening capacity |
| Iron/manganese media (if installed) | 5 to 10 years (avg ~7) | Staining returns or breakthrough |
| Anti-scalant solution (if installed) | Quarterly refill | Low chemical level or inconsistent dose |
For step-by-step pre-filter swaps, the pre-filter replacement guide walks through the housing removal, O-ring handling, and startup flush in detail.
Install a pressure gauge on either side of the pre-filter stack. A pressure drop of 10 PSI or more across the housings is a clear signal that filter replacement is overdue, often before flow changes show up at the tap.
Ready to stock up on replacement components?
Crystal Quest support can help match the correct Big Blue cartridges, membranes, and pre-treatment parts to your system capacity and water test results.
RO Membrane Care and Replacement
RO membranes are the part of the system that determines what actually leaves your tap. They run under continuous high pressure, see every gallon of treated water, and quietly degrade until the day you measure rising total dissolved solids (TDS) at the faucet. Membrane care is the load-bearing part of a whole house maintenance routine.
The Three Classes of RO Membrane
Crystal Quest stocks three membrane classes, each engineered for a different feed-water context. The class is set at the time the system is specified, and is matched to the actual feed-water TDS at install.
Freshwater Membranes
Standard thin-film composite membranes built for feed water with TDS up to 2,000 ppm. That covers nearly all US municipal supply and most light to moderate well water. Freshwater membranes typically operate at 150 to 250 PSI and provide 95 to 99% rejection of dissolved solids when the system is sized, pre-treated, and maintained correctly. This is what most residential whole house RO systems use.
Brackish Water Membranes
Tighter pore structure and enhanced chemical resistance, designed for feed water with TDS between 2,000 and 10,000 ppm. Common in high-mineral wells, coastal regions with seawater intrusion, and areas where the feed water already exceeds what a freshwater membrane can handle without premature scaling. Brackish membranes typically run at higher pressure and need more frequent cleaning cycles.
Desalination/Seawater Membranes
Specialized high-pressure membranes for true seawater (TDS above 10,000 ppm, typical seawater being 32,000 to 35,000 ppm). These operate at 600 to 1,200 PSI and require corrosion-resistant components throughout the rest of the system. Outside oceanfront properties and dedicated desalination installations, you will not encounter these.
Matching the membrane class to actual feed water is the difference between a 3 year service life and an 18 month one. If you're not sure which class your system uses, the spec sheet that came with the install lists it, and Crystal Quest support can confirm from the serial number.
Membrane Configuration by System Capacity
Larger systems use multiple membranes in parallel to scale throughput. The pressure vessels, membrane sizes, and counts move in lockstep with rated GPD.
| System Capacity | Membrane Size | Membranes |
|---|---|---|
| 300 to 400 GPD | 2.5" x 21" | 1 |
| 500 to 1,000 GPD | 2.5" x 21" or 2.5" x 40" | 1 |
| 1,500 to 2,500 GPD | 2.5" x 40" | 1 to 2 |
| 4,000 to 7,000 GPD | 4" x 40" | 2 to 4 |
When a system uses multiple membranes, they live in parallel pressure vessels with shared feed and concentrate lines. Flow balance across the array matters more than any single membrane's performance, which is why the array gets replaced as a set.
When to Replace Your Membranes
Three signals tell you the membrane is at end of life. Any one of them is enough.
- TDS rejection drops below 90%. A healthy RO membrane holds at or above 90% rejection measured at the faucet against the feed. Below that, the membrane is fouling or the pre-filters are letting too much through. Use a handheld TDS meter to spot-check feed and permeate, then calculate. The RO rejection rate calculator and interpretation guide walks through the exact math.
- Flow rate declines steadily. If a 1,000 GPD system has been producing about 42 gallons per hour and that number has been creeping down for months, the membrane is fouling. Cleaning may recover it. Eventually, replacement won't.
- Calendar age past three years. Even a well-maintained membrane on clean municipal feed will quietly degrade past three years. Replace before performance falls off, not after.
Replace every membrane in a multi-membrane array at the same time. Mixing new and old is a known cause of accelerated wear on the new membranes (the older units pass more water at lower pressure, so the new ones see disproportionate stress). One swap, every membrane, same day.
When Cleaning Belongs in the Plan
If rejection or flow falls before the membranes are at end of life, cleaning may recover performance. The important decision is diagnosis: organic fouling, mineral scale, chlorine exposure, and old membrane age do not all respond to the same fix.
For chemical selection, dilution, circulation, soak timing, and return-to-service steps, use the dedicated RO membrane cleaning guide. This article keeps the decision point in the maintenance schedule; the cleaning guide carries the full procedure.
CIP cleaning uses strong chemicals and temporary system bypasses. Treat a first-time CIP on a whole-house array as a professional service unless you already have the pump, cleaner, test meters, and safety routine.
How to Replace RO Membranes
Membrane replacement on a whole-house RO is a planned array service, not a casual cartridge swap. Shut down and depressurize the system, replace every membrane in the array with the same matched class, verify brine-seal orientation, flush, and retest TDS rejection before returning the system to normal use.
The full visual walkthrough lives in the membrane replacement guide, including brine seal orientation, housing access, flush timing, and notes for larger 4" x 40" membranes. Use that guide before opening the pressure vessels; larger arrays often justify two people or professional service.
Atmospheric Tank Maintenance
Whole house RO systems use atmospheric storage tanks rather than the small pressurized bladder tanks found on point-of-use units. Atmospheric tanks are vented to the air, hold a much larger volume (typically 165 to 550 gallons), and are exposed to environmental conditions over time. That exposure is the reason they need annual attention.
What to Inspect
Once a year, drain the tank from the bottom valve and look at the inside. The things you're checking for:
- Sediment buildup at the tank floor (mineral fines and biological debris)
- Biofilm along the waterline, where atmospheric exposure meets the water surface
- Algae in corners or where light has reached the tank interior
- Vent screens: intact and free of debris; damaged screens allow insects and dust into the tank
- Float switches: moving freely, activating cleanly, not crusted with mineral deposit
- Overflow drain: clear and flowing (lift the float manually to confirm)
Even food-grade tanks develop biofilm over time. Annual cleaning is the difference between a system that delivers clean water for fifteen years and one that needs a tank replacement at year eight.
Tank Sanitization Procedure
After inspection, sanitize before refilling. The short version is simple: use unscented household bleach, keep chlorine away from the RO membrane and downstream filters, and flush until a chlorine test strip reads 0 ppm at the faucet.
For most annual cleanings, use 1 to 2 teaspoons of unscented household bleach per gallon of mix water. That lands in the 50 to 100 ppm free-chlorine range referenced by ANSI/AWWA C652, the industry standard for water-storage disinfection. The same dose math is documented in Oregon Health Authority's shock chlorination procedure for utility tanks and wells.
Bleach must never contact the RO membrane. Bypass the membrane and downstream cartridges before sanitizing, use only unscented non-splashless bleach, and never combine bleach with ammonia-based cleaners.
The full workflow, including drain/rinse order, soak time, flushing, downstream remineralizers, and UV stages, lives in the RO tank cleaning guide. Keep the annual interval here; use the tank guide when it is time to perform the job.
Booster Pump Maintenance
The booster pump is the part of the system most owners don't think about until it stops. It runs at 150 to 250 PSI, cycles thousands of times per year, and has seals and bearings that wear from the day it's installed. Six-month service is the difference between a 10-year pump and a 5-year pump.
Every Six Months
Set a reminder. The check itself takes about an hour.
- Motor temperature: with an infrared thermometer, measure the motor casing temperature during normal operation. Most booster pumps should run below 140°F. Higher readings indicate worn bearings, poor ventilation, or impending motor failure.
- Shaft seals: inspect for weeping. Any visible leak around the seal will escalate fast under high pressure. Replace the seal before it becomes a flood.
- Cooling fins and housings: clean off dust and debris. In an equipment room or basement, dust accumulation is the leading cause of motor overheating.
- Bearings: if your pump model is bearing-lubricated, add food-grade grease per the manufacturer's spec. Many modern booster pumps use sealed bearings that don't require service.
- Pressure switch: confirm cut-in and cut-out pressures match factory settings. Adjustment that's drifted over time causes rapid cycling and premature wear.
- Electrical terminals: check for corrosion or loose connections. Loose terminals cause voltage drop and inconsistent startup.
Distribution Pump (Re-Pressurization)
The second pump in a whole house RO setup moves treated water from the storage tank into the home's plumbing. It runs at lower pressure than the booster but cycles more often, since it responds to every faucet that opens in the house.
- Pressure tank pre-charge: with the system off and depressurized, the pre-charge should read 2 PSI below the pump's cut-in pressure (so 38 PSI for a 40/60 switch). Incorrect pre-charge causes rapid cycling.
- Check valve: after the pump shuts off, listen for water flowing backward. A failed check valve causes the pump to cycle when nothing is being drawn.
- Thermal overload protection: confirm it activates if the motor overheats. This is the safety feature that prevents burnout.
Rapid pump cycling is the single most common symptom that something is wrong, but the cause is usually pre-charge, check valve, or pressure switch rather than the pump itself. Diagnose those three first before assuming the pump needs to be rebuilt.
For systems with float-switch-controlled tank fill, see the float switch installation and wiring guide for the wiring diagram and the cut-in logic.
Troubleshooting Common Whole House RO Issues
When something goes wrong, the symptom usually points to one of five or six root causes. Start with the most likely candidate.
| Symptom | Likely Cause | First Check |
|---|---|---|
| Low pressure throughout the house | Empty storage tank, distribution pump failure, or demand exceeds supply | Confirm tank water level, then test pump cycling |
| High TDS at every tap | Membrane failure, open bypass valve, or reversed membrane after replacement | Test each membrane vessel separately; verify bypass valves are closed |
| Frequent pump cycling | Waterlogged pressure tank, distribution leak, or failing pressure switch | Check pressure tank pre-charge and walk the plumbing for leaks |
| Storage tank overflow | Stuck float switch, solenoid failure, or controller misconfiguration | Lift the float manually to confirm activation |
| Membrane fouling within months | Pre-treatment failure (softener bypassing hardness, anti-scalant dose off) | Test hardness and chlorine at the RO inlet |
| Power bill creeping up | Pump losing efficiency, scaled membrane, or low recovery rate | Compare current pump amp draw to install-time baseline |
The pattern with whole house RO problems is that the symptom and the cause are rarely the same component. Low house pressure is almost never the distribution pump itself, it's the tank being empty because the booster has slowed down because a pre-filter is fouled. Start at the front of the system and work backward.
Professional Service Recommendations
Most whole house RO maintenance is DIY-friendly for a handy homeowner. Some of it isn't. The honest line between the two:
| Task | DIY or Pro? | Why |
|---|---|---|
| Weekly walkthrough and gauge check | DIY | Five minutes, no tools beyond a notebook |
| TDS testing at the faucet | DIY | $20 handheld meter, one minute of measurement |
| Big Blue pre-filter swap | DIY | Standard housing wrench, predictable cartridges |
| Atmospheric tank sanitization | DIY (with safety disclaimer above) | Mechanical task, dose math is well-defined |
| Pressure switch and pre-charge adjustment | DIY | Tire gauge and a screwdriver |
| Single-vessel membrane swap on smaller systems | DIY (with patience) | Mechanical, but O-ring orientation matters |
| Multi-membrane array replacement (4" x 40") | Pro | Heavy housings, flow balancing across vessels, two-person job |
| CIP cleaning with strong chemicals | Pro (first time at minimum) | Chemical handling, dilution math, recirculation setup |
| Booster pump rebuild | Pro | Specialized tools, shaft alignment, bearing tolerances |
| Control panel programming and alarms | Pro | Settings affect recovery rate, flush cycles, and membrane life |
| Persistent water quality issues | Pro | Comprehensive lab analysis beyond what handheld meters reach |
| Annual whole-system performance review | Pro (recommended) | Outside set of eyes catches drift the owner has stopped noticing |
The annual professional review is the one item on the list that's easiest to skip and most useful to keep. A trained technician can measure recovery rate, compare pump pressure to baseline, inspect controls, and flag drift before it becomes emergency downtime. If you are still evaluating ownership costs before buying, the whole-house RO cost guide covers system, tank, pump, installation, and pre-treatment variables.
Keeping Your Whole House RO Running for the Long Haul
Whole house RO is a long-term commitment, and the systems that last a decade aren't the ones with the fanciest hardware. They're the ones the owner watches.
Five minutes a week with a TDS meter and a pressure gauge tells you more about your system's health than any annual inspection. Most service calls Crystal Quest takes still start the same way: "something tastes different," or "my flow dropped." Those are the readings your weekly check is supposed to catch first. A shop that only sells one approach will tell you that approach fits everything. The truth is that whole house RO is a system of systems, and each piece runs on its own schedule. The article you just read is the schedule.
Crystal Quest has been designing and manufacturing water filtration systems for more than three decades. The maintenance routine above follows the same practical logic used in system support: protect the membrane first, keep the tank clean, log the readings, and address drift before it becomes failure.
Need help with your whole house RO setup?
Crystal Quest water specialists can review your water test results, walk through your maintenance log, and recommend the right replacement parts or service for your specific install.
Frequently Asked Questions About Whole House RO Maintenance
How often should I check my whole house RO system?
Do a five to ten minute walkthrough weekly. Check pressure gauges, pump sound, storage tank level, visible leaks, and add a monthly TDS reading to track membrane health.
How often should I replace filters in a whole house RO system?
Pre-filters and remineralization filters usually run on a 12 to 24 month cycle, while RO membranes run closer to 2 to 3 years. Keep the schedules separate so you do not under-service pre-filters or over-service membranes.
Should I replace all RO membranes at once in a multi-membrane array?
Yes. Replace every membrane in the array at the same time. Mixing new and old membranes creates flow imbalance and can shorten the life of the new set.
What is CIP (Clean-in-Place) membrane cleaning?
CIP cleaning circulates a chemical cleaning solution through the membrane array without removing the membranes. It can help with fouling or scale when the membrane is not yet at end of life, but first-time whole-house CIP is usually a professional-service job.
How do I maintain the atmospheric storage tank?
Drain, inspect, and sanitize the tank annually. Check sediment, biofilm, vent screens, float switches, and the overflow drain. Use the dedicated tank cleaning guide for the full bleach ratio, soak, bypass, and flush procedure.
What pre-treatment do I need before whole house RO?
It depends on the water test. Hard water may need a softener, iron or sulfur wells may need a dedicated filter, and high silica or difficult chemistry may justify chemical dosing. Pre-treatment should match the test, not a generic package.
When should I call a professional for whole house RO maintenance?
Weekly checks and many pre-filter swaps are DIY-friendly. Use a professional for larger membrane arrays, booster pump work, first-time CIP cleaning, controls, and the annual performance review.
How do I know if my booster pump needs service?
Watch for grinding or squealing, casing temperature above 140°F, seal leaks, pressure swings, or rapid cycling. Rapid cycling can also come from a pressure tank or check valve issue, so diagnose those before assuming the pump has failed.
