Which filter does my Intex PureSpa take? Lookup by set number and year

Reviewed November 1, 2026

Look at the full set number on the box or spa label, including the letters at the end. Intex’s own lists put 24 PureSpa and SimpleSpa set numbers ending in E, WL or EP (28403E, 28407E, 28413WL, 28473E, 28491E and others) on the Type S1 cartridge: single part 11692, two-pack 29001E or six-pack 29011E, 4-1/4" × 2-15/16", Unicel C-4317, Pleatco PIN4PAIR. Intex’s parts archive files the S1 cartridge under those sets from 2016 to 2026. Seven newer sets ending in EG or EH (28425EG/EH, 28427EG/EH, 28439EH, 28441EH, 28449EH) take the Type S2 cartridge instead: single part 13435 or two-pack 29012E, 3.375" × 5.125", with no Unicel, Pleatco or Filbur equivalent. 28425E and 28425EG look alike but take different cartridges.

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The cartridges, with equivalents

The Intex part and pack numbers are from Intex’s own product and replacement-part pages. The aftermarket numbers are from the Unicel 2026 guide and the Pleatco 2023 catalog. Filbur’s catalog lists neither cartridge.

Type S1 sets: set number and year

The set numbers and names are Intex’s own compatible-item list for part 11692. The years are the model-year folders that Intex’s replacement-parts archive files part 11692 under for each set. “Not given” means the set is on the compatible list but not in the archive.

The archive also files part 11692 under four set numbers that are not on the compatible list: 28403VM (2018, 2022–2025), 28405CA (2017, 2018, 2022–2025), 28407VM (2018, 2022–2025) and 28417WL (2017, 2018, 2022–2025). They look like regional versions of the sets above, but Intex does not say so. Treat them as S1 only after checking the old cartridge.

Type S2 sets

These are the seven sets on Intex’s compatible-item list for part 13435. Intex’s archive does not file the S2 cartridge under any model year, so there are no years to show. Intex’s page for 28425EG lists “2 S2 filter cartridges” in the box.

Cleaning and replacement

Intex’s 29001E page says to clean S1 cartridges each week and replace them once a month or sooner, and describes the media as heavy-duty Dacron paper. Because the 11692 single is discontinued, the 29001E two-pack is the S1 part Intex still lists. Intex lists two spa cartridge housings (11798 and 13436) as related parts on the S2 pages, but it does not say which housing goes with which cartridge. For the S1 versus S2 sizes in more depth, and the Bestway equivalent, see Intex and Bestway inflatable spa filters.

Where the sources disagree

• S1 end opening. Unicel prints 2-1/16" open at both ends for C-4317. Pleatco prints 1-5/8" for PIN4PAIR. The body size agrees. Retailer pages we checked on 2026-11-01 repeat one figure or the other and give no measurement of their own, so the conflict stands and the C-4317 page stays flagged.
• The “2019” sets. Intex’s compatible list names 28403E, 28405E, 28407E, 28409E and 28453E with “(2019)”. The archive files 28405E only under 2017 and 2018, and the other four under more years than 2019.
• Same base number, different cartridge. Intex lists 28425E, 28427E, 28439E and 28441E under S1, but 28425EG/EH, 28427EG/EH, 28439EH and 28441EH under S2.
• Retailer model lists. A Home Depot listing for 29001E names 28413E, 28423E and 28443E, which are not on Intex’s S1 list.
• 28491E size. The compatible list calls it 152in × 70in; the archive folder is 152in × 72in.
• S2 size. Intex gives 3.375" × 5.125"; a Target listing for 29012E prints 3.5" × 6.25".

Known limits

• The years show where Intex’s archive files the part. They are not a statement from Intex that every unit sold in those years shipped with it.
• Some 2026 archive pages on Intex’s site load empty, so a 2026 set could be missing here.
• No source gives years for the S2 sets, for 28433EP/28433WL or for 28457EP.

How to confirm yours

1. Read the full set number, including the suffix, from the box, the spa label or the owner’s manual, and find it in the tables above.
2. Not listed? Measure the old cartridge: about 4-1/4" wide and under 3" tall is S1; about 3-3/8" wide and 5-1/8" tall is S2. See our filter-size guide.
3. Compare with the Intex brand table and the S1 and S2 cartridge pages.

Why one cartridge size can carry two different square-foot ratings: our explainer with Unicel’s pleat-count table.

Sources

1. Intex: 11692, Spa Cartridge (S1): compatible item list of 24 set numbers (now marked discontinued)
2. Intex: Replacement parts archive, PureSpa (set number and model-year folders that list part 11692)
3. Intex: Archive example: 79in × 79in × 28in, 2018, 28413WL (part 11692 listed)
4. Intex: Type S1 filter cartridge 2-pack, SKU 29001E (cleaning and replacement interval)
5. Intex: Type S1 filter cartridge 6-pack, SKU 29011E
6. Intex: 13435, Spa Cartridge (S2): compatible item list of 7 set numbers
7. Intex: Filter Cartridge S2 Twin Pack, SKU 29012E (3.375" × 5.125"; control-unit models only)
8. Intex: PureSpa Olive Green Round Bubble 4-person, 28425EG (“2 S2 filter cartridges”)
9. Unicel 2026 Replacement Guide: Intex section (PureSpa, 11692 / 29001 / Type S1 = C-4317) and 4000-series spec table
10. Pleatco 2023 Catalog: PIN4PAIR (Intex EZ Set Pure Spa S1, OEM 29001E)
11. Filbur Catalog & Reference Guide: checked; no Intex spa cartridge listed
12. Home Depot: Intex 29001E listing (retailer model list)
13. Target: Intex 29012E listing (retailer size)

This page summarizes published catalogs and dealer fitment tables; always follow your own spa’s owner’s manual. See our disclaimer and methodology.