Tier1 Replacement for Pentair Rainbow 35 Pool Filter Cartridge | Compatible with Unicel C-4335, Pleatco PRB35-IN, Filbur FC-2385 | 9.25" x 7.13" | Trilobal Fabric | Washable Pool Cartridge

Key features

•AFFORDABLE REPLACEMENT: Replacement PRB35-IN-3 Spa filter for 35 sq ft Dynamic series systems and any systems that need 5 inch (Outside diameter) by 9 1/4 inch (Length) filters
•INCREDIBLY SIMPLE TO USE: Easily replace your old C-4335, Pleatco PRB35-IN, FC 2385 with the Tier1 R173431
•EXTREMELY DURABLE: Durable and Washable Pleated fabric that maintains strength even when loaded with sediment, our high flow core is designed to support the filter while providing industry leading flow rates while causing less wear and tear on your pump
•POOL AND SPA FILTER CARTRIDGE REPLACEMENT: This Tier1 R173431 can be used in place of your Unicel C-4335 Spa filter
•100% TIER1 NO WORRIES GUARANTEE: We stand behind the quality of filtration and overall performance of our Tier1 filters!

BrandTier1

CategoryCartridge Pool Filters

Size1-Pack

Tier1 Replacement for Pentair Rainbow 35 Pool Filter Cartridge | Compatible with Unicel C-4335, Pleatco PRB35-IN, Filbur FC-2385 | 9.25" x 7.13" | Trilobal Fabric | Washable Pool Cartridge

List Price: $36.82$33.14DEALYou Save: $3.68 (10%)

Free shippingFree Returns – 30 daysFree Order CancellationSecure Payment2–3 Days DeliveryGet It June 25, 2026In Stock (2)No marketing spamNo account requiredFulfilment by FedEx / Amazon / UPS / ShipwirePayPal / Card Buyer Protection

Related products

Unicel

Unicel C-7459 Swimming Pool and Spa 85 Sq. Ft. Replacement Filter Cartridge for Jandy CL340 (4 Pack)

List: $447.40$402.66DEAL

Bespoke+

Bespoke+ Spa Filter Cleaner for Hot Tubs - 1-Hour Cartridge Filter Cleaner Soak Solution, Hot Tub Filter Cleaner Soak & Pool Filter Cleaner for Pool Cartridges | HotTub & Spa Filter Cleaner Soak 16oz

List: $25.20$22.68DEAL

RELXTIME

RELXTIME 6 Pack Blue Spa Filter Cartridges, Pool Hot Tub Filters Replacement, Filtration Inflatable Hot Tub

List: $53.24$47.92DEAL

U.S. Pool Supply

U.S. Pool Supply Pool & Spa Filter Cartridge Cleaner Tool - Quickly Cleans and Removes Filter Dirt & Debris - Durable Cleaning Wand with 6 Powerful Water Jets - Clean Dirty Filter Cartridges for Reuse

List: $29.08$26.17DEAL

Sundance

Sundance Spa Filter OEM 6540-488

List: $110.45$99.41DEAL

EXCELFU

EXCELFU Spa Filter Replaces Unicel C-4405, PRB25SF Pair, Filbur FC-2387, Marquis 20342, Rainbow DSF 50, R172464, APCC7062, CMP 25392-000-100, 17-2464, 817-5010 Hot Tub Filter 2 Pack

List: $52.36$47.12DEAL

ClearChoice Great Filters. Great Prices.

Clear Choice Pool Spa Filter 2.75 Dia x 10.00 in Cartridge Replacement for Sediment prefilter Baleen AK-6903, [2-Pack]

List: $52.36$47.12DEAL

POOLPURE

POOLPURE PRB25SF Spa Filter Replaces Unicel C-4405, Filbur FC-2387, PRB25SF-PAIR, R172464, APCC7062, CMP 25392-000-100, 17-2464, 817-5010 Hot Tub Filter 2 Pack

List: $64.58$58.12DEAL