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Home > Spa Parts Catalog > Filters & Accessories > Filter Finder
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Filter Care
Diameter
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Replacement Filter Elements

How to measure your filter cartridge:


  1. Measure the outside diameter of the cartridge (in inches, +/- 1/32”).
  2. Measure the cartridge length (in inches, +/- 1/16”) including end caps but excluding any handles or other extensions. Unicel recommends measuring through the center (if possible) rather than along the outside edge.
  3. Identify the cartridge outside edge end cap configuration using the chart below. If the top and/or bottom is “open,” measure the inside diameter (in inches, +/- 1/32”) of the top and/or bottom.

END CAP CONFIGURATIONS



2" Male Slip Fitting

1-3/4" Male Slip Fitting

1-1/2" Male Slip Fitting

1-1/2" or 2" SAE Thread

1-1/4" SAE Thread

2" Male Thread/MPT

1-1/2" Male Thread / MPT

Bar Handle

Castle

Castle with Cross Ribs

Closed

Closed with 2" SAE Thread

Closed with 3-Step Edge

Closed with raised Ring

Closed with String Handle

Closed with String Loop

Closed with Y Stand-Offs

Hose Fitting

Injection Molded Cone Adapter

Injection Molded Knob Handle

Male Slip Fitting with Molded O-Ring

Male Slip Fitting with MPT

Molded Cone Handle

Open

Open with 12 Concentric Holes

Open with 12 Concentric Slots

Open with Beveled Edge

Open with Molded Gasket

Open with Molded O-Ring

Open with Slots

Open with Step

Open with Twist Lock

Semi-Circular Handle