Drop-in spa · Hot tub filters
Future Way PRB35-IN Hot Tub Filter for Thermospa, 2-Pack
4.8 · 174 reviews$37.992-pack
Price at our last check; the listing shows today’s price and delivery for your address.
Fit check
| Height | 9-1/4" |
|---|---|
| Outside diameter | 5" |
| Inside diameter | 2-1/8" |
| Filter area | 35 sq ft |
Swap day: Clean monthly; replace every twelve to eighteen months.
About this filter
A squat 5 by 9-1/4 inch drop-in with 35 square feet of media. It is the filter for Thermospa FL1008 tubs and for Waterway 35 in-line housings.
- Replaces Pleatco PRB35-IN, Unicel C-4335 and Filbur FC-2385
- Our best-rated spa filter across a long run of reviews
- Spunbond polyester stands up to strong jet pumps
Replaces these part numbers
- Pleatco PRB35-IN
- Pleatco PRB35-IN-M
- Unicel C-4335
- Filbur FC-2385
- Pentair R173431
- Guardian 409-219
- Waterway 817-3501
- Thermospa FL1008
Manufacturer names and part numbers are listed for compatibility reference only. Confirm your model or measure the old filter before ordering.
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