Water Filter CartridgesSKU CQE-RC-04148

Lead Filter Cartridge

$60.80 Regular price $64.00

Save $3.20 compared with one-time purchase

Target lead with a cartridge combining catalytic carbon, redox media and cation-exchange resin. Four replacement sizes provide different published flows and estimated capacities for a system specifying this lead-treatment blend.

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Size, 2-7/8" x 9-3/4"
Four Lead Filter cartridges beside matching slim and wide filter housings, with cartridge width × height labeled in inches and the Crystal Quest logo.

Which size lead cartridge do I need?

Match the lead cartridge type and size on your system or cartridge sticker.

Cartridge width (diameter) × height → matching Crystal Quest sump.

  • 2⅞″ × 9¾″: Fits 2.5″ × 10″ sumps. Common in countertop, under-sink and replaceable-cartridge inline filters.
  • 2⅞″ × 20″: Fits 2.5″ × 20″ sumps. Common in mini whole-house filters.
  • 4⅝″ × 9¾″: Fits 5″ × 10″ Big Blue sumps. Common in compact whole-house filters.
  • 4⅝″ × 20″: Fits 5″ × 20″ Big Blue sumps. Common in full-size whole-house filters.

Still unsure? Check your order history to confirm your previous cartridge and size.

Filtered water, on repeat.
. Cancel whenever you want

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Made in USA

Shipping

Free shipping on residential orders over $150 within the lower 48 US states.

Order by 3:00 PM Eastern on a business day and most filters, cartridges and smaller items leave our facility that same day. Standard residential systems ship within 1 to 2 business days, and whole house, custom and specialty systems typically within 3. So far in 2026, 95% of our orders have shipped within one business day and 99% within five (based on an internal review of our order records).

Once shipped, standard delivery typically arrives in 3 days to the Southeast, Northeast and Southwest, and in 4 days to the Midwest and the West. Need it sooner? UPS 2nd Day Air and Next Day Air are available at checkout for eligible products. Systems that ship by freight can take longer and may need a delivery appointment.

Lifetime support

Our team answers questions about products, orders, installation, troubleshooting and replacement parts.

Phone: 770-951-5600 or (800) 934-0051

Email: help@crystalquest.com. We reply within 24 to 36 hours.

Live chat during business hours

Hours: Monday to Friday, 9:00 AM to 5:00 PM Eastern. We observe U.S. federal holidays.

Description

Lead Filter Cartridges combine catalytic GAC, redox alloy and cation-exchange resin in a lead-treatment blend. Select this replacement when your water treatment system specifies the lead cartridge.

Each size has a published service flow and estimated gallon capacity. The table's conditions and your source water matter; a larger stated capacity does not make a different cartridge size compatible with your housing.

Common questions

What media is used?

The cartridge combines catalytic granular activated carbon, redox alloy and cation-exchange resin.

Does every size have the same capacity?

No. Review the capacity and flow for the selected size; the figures differ across the four options.

When should I replace it?

Use the selected cartridge’s capacity and your water conditions to plan service. Ask Crystal Quest to confirm the testing and replacement schedule for your setup.

How should I choose the replacement?

Confirm the lead-treatment cartridge specified for your system, including its part number, actual dimensions and service-flow requirements.