Filters

At Spa Master we supply premium quality replacement filters for most brands of hot tub spas including a 100% guarantee against manufacturers defects.

Search for a Filter

By Manufacturer

Select hot tub maker:

By Filter Number

By Filter Size

exclude handle and thread

Step 1: Select nearest diameter

Calculation:

Pleat Counts X 2 X Pleat Depth X Pleat Length ÷ 144 = square footage

Please Note:
Filter Cartridge Measurements may vary. Always allow a variance of: (± 1/16 inches or ± 1.6 mm)

Measure Diagram

Measure the length of the cartridge. (B)
Measure the outside diameter of the cartridge. (A)
Do not include any handles, strings, threads etc.
A more accurate measurement is made by measuring through the center of the cartridge when possible.
If the top and/or bottom is open, measure the inside diameter of the opening. (C)
Match the cartridge end cap configuration to a corresponding one in the filter search.
Make note of the manufacturer (OEM) and model number of the filter the replacement cartridge will be installed in.
Take note whether or not there is a centre core in centre.
You may also count the number of pleats (± 2) to work out sq. ft. which is explained opposite.