Rx Clear 425 sq ft Quad Cartridge Filter
The cheapest real quad — A genuine four-element 425 for around $700 — with a critical tail four times the category's best
Contender — The Best In-Ground Cartridge Pool Filters (2026): SwimClear vs Clean & Clear Plus vs Crystal Water
Specs
| Filter area | 425 sq ft |
| Elements | 4 (multi-element) |
| Pool type | In-ground |
| Warranty | Not stated on the listing |
Pros
- Roughly $580 under the Waterway and $1,100 under the Hayward at identical filter area
- Genuinely four elements and genuinely Rx Clear's own listing, not a white-label using the name
- Reemay filter media and an HD-4 all-resin tank, both specified on the listing
- 2-inch ports and 150 GPM, so it does not bottleneck a variable-speed pump
Cons
- One review in six is critical, and the theme is performance rather than the cleaning-frequency grumble that dominates this category
- The most common complaint is that it does not filter: pressure differential never rises even with clogged cartridges
- Two of five critical reviewers received the unit with missing or wrong-sized union o-rings
- Owners report the manufacturer does not respond on defective units
- 31 ratings is a thin base for a pressure vessel you will own for a decade
Reports that it does not actually filter, plus missing o-rings on arrival
5 of 31 ratings are critical (16.1%); two report the filter not filtering at all and two arrived with union o-rings missing or the wrong size · critical reviews read August 2026
“Went from a sand filter to this cartridge filter, been using it for 4 months now and it is working fine. Price was good, quick shipping.”— victor martino, Amazon · Verified owner
FAQ
Who is the Rx Clear 425 sq ft Quad Cartridge Filter for?
You are replacing a filter on a budget that will not stretch to a major, you accept a thinner and rougher owner record, and you would rather have four cartridges at $700 than one cartridge at the same money.
What do owners say about the Rx Clear 425 sq ft Quad Cartridge Filter?
4.2★ across 31 owner ratings (Amazon, read August 2026 · early data). What owners complain about: Reports that it does not actually filter, plus missing o-rings on arrival
What is the warranty on the Rx Clear 425 sq ft Quad Cartridge Filter?
Rx Clear publishes no warranty term for the Rx Clear 425 sq ft Quad Cartridge Filter — we looked for one from the maker and record the absence rather than guess. Buy it somewhere with a return window you trust.
✓ Safety: no active recall — No CPSC recall for Rx Clear (database read 2026-08-26, 9,966 records, word-boundary matched across the whole record). Pressure vessel: stop the pump and bleed the air relief before opening the band clamp.
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Data last verified: August 2026. Ratings are real, dated reads — never scraped or invented. Full methodology and monetization disclosure: how we test.