Clarathon Premium Hot Tub Filters

Measure Your Old Hot Tub Filter

Use Menu to Narrow Your Search:

1. Choose Type: Drop-In or Screw-In.
2. Got Part #? [Search this category] No match? Go to 3.
3. Pick: Spa Brand if known. No match? CLEAR Brand (x). Go to 4.
4. Select: Diameter & Length ranges to narrow selection.

Follow measuring tips below:

Confirm Spa Filter Dimensions

• Round all figures to nearest ⅛”.
• Compare to search results.
• View photos to confirm match.
• Variances ±⅛” are normally OK.

See how to measure filter below:

How-to Measure Diameter & Length

Measure old filter’s end-cap Diameter (edge-to-edge width) & Length (cap-to-cap height). Exclude handles/fittings.

How-to Measure Inner Opening

If filter has flush end-cap opening(s), measure Inside Diameter.

How-to Measure External Fitting

If filter has a protruding fitting, measure Outside Diameter. Note style: Coarse Thread, Fine Thread, or Male Slip.