Pentair Clean & Clear Plus 520 sq ft Cartridge Filter
Not ranked — 520 sq ft — but on a base too thin to score
How to read a Showdown Score™
The only score that counts how often a product breaks, not just how owners feel about it.
- Three parts add up to the score: what owners rate it, how often it fails them, and whether a credentialed tester backed it.
- Bands: Exceptional 8.5 and up, Excellent 7.5, Very good 6.5, Good 5.5, Fair 4, Poor below 4. Every score is dated.
- Price, the warranty and what a link pays us stay out of it.
See what has been read
Contender — The Best In-Ground Cartridge Pool Filters (2026): SwimClear vs Clean & Clear Plus vs Crystal Water
Specs
| Filter area | 520 sq ft |
| Elements | 4 (multi-element) |
| Pool type | In-ground |
| Warranty | 1 yr parts on the EC- (eCommerce) SKU. The plain TradeGrade SKU bought online gets 60 days. |
Pros
- 520 sq ft of capacity
- Same four-element construction as the rest of the line
Cons
- Six ratings is far below the base we score on — we do not rank this filter
- The one visible owner review reports a drain cap plug failure that flooded
- Costs about $494 more than the 420 at our 5 November 2026 read for 100 more square feet
One review, and it is a drain cap plug blowing off under pressure
1 of 6 ratings is critical; six ratings is far below the depth we score on, and the single card describes the drain cap plug shearing and blowing off under pump pressure · critical reviews read August 2026
FAQ
Who is the Pentair Clean & Clear Plus 520 sq ft Cartridge Filter for?
You specifically need Pentair at 520 sq ft; we cannot rank it on six ratings.
What do owners say about the Pentair Clean & Clear Plus 520 sq ft Cartridge Filter?
3.3★ across 6 owner ratings (Amazon, read August 2026 · too thin to judge). What owners complain about: One review, and it is a drain cap plug blowing off under pressure
What is the warranty on the Pentair Clean & Clear Plus 520 sq ft Cartridge Filter?
1 yr parts on the EC- (eCommerce) SKU. The plain TradeGrade SKU bought online gets 60 days.
Record
- — Price read 2026-11-05 from the live Amazon offer (Creators API): $1,788.99, on sale (11% off) against a list of $1,999; was $1,849. Stock at the read: Only 7 left in stock. Published at read time per the 2026-09-15 rule.
- — Review base read: 3.3★ across 6; no variant menu; 1 visible review, no free-product (Amazon Vine) reviews, all US. So the rating describes this one product, bought by US owners. Our listed rating was not changed in this pass.
Warranty — and what changes if you buy it on Amazon
1 yr parts on the EC- (eCommerce) SKU. The plain TradeGrade SKU bought online gets 60 days. · you are buying this on Amazon
Read it yourself: Pentair warranty document · we read it . Terms change without announcement, so treat this as a dated snapshot. How warranty works by buy path →
✓ Safety: no active recall — Pressure vessel — bleed the air relief valve and stop the pump before opening the clamp ring.
Size your pool first → ·All pool gear →
Data last verified: 2026-11-05. Ratings are real, dated reads — never scraped or invented. Full methodology and monetization disclosure: how we test.