Unicel UHD-SR135 135 sq ft replacement filter cartridge elementUnicel 135 sq ft Filter Cartridge$13499
Unicel UHD-SR135 135 sq ft replacement filter cartridge element
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Unicel 135 sq ft Filter Cartridge

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$13499
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Quick overview

  • 135 square feet The rated media area of the element, so the filter keeps the surface area it was sized for.
  • Sta-Rite replacement Listed as the replacement for the Sta-Rite WC108-53S1X filter element.
  • Measured fit 8-11/16" outside diameter by 34-1/2" long, the two numbers worth checking against the old cartridge.
  • Unicel made Supplied under the Unicel name, a long running cartridge manufacturer.
  • Clean and refit Cartridge elements are rinsed and put back in service, then replaced once the pleats give out.
  • Watch the pressure A cartridge at the end of its life shows up as filter pressure that climbs again soon after a cleaning.
Full description and specifications ↓

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Product details

The Unicel UHD-SR135 is a 135 square foot replacement cartridge element measuring 8-11/16" across the outside diameter and 34-1/2" long. It is listed as the replacement for the Sta-Rite WC108-53S1X element.

Check the two numbers

Cartridges are chosen by size, not by filter model alone. Pull the old element, measure the outside diameter and the overall length, and match them to the 8-11/16" and 34-1/2" figures here. Getting either wrong leaves the element loose in the tank, and water finds its way past instead of through the media.

Cleaning and replacing

An element like this is rinsed and put back in service several times before it is finished. The signal that it is done is filter pressure that climbs back to where it was within days of a cleaning, or pleats that have gone brittle, matted or torn. At that point no amount of cleaning restores the flow.

What you are buying

This is supplied under the Unicel name and carries the Unicel number UHD-SR135. It is a replacement element for a Sta-Rite filter rather than a Sta-Rite branded cartridge.

Specifications
Brand Unicel
Manufacturer part number UHD-SR135
UPC 645544025609
Square footage 135
Outside diameter 8-11/16"
Length 34-1/2"
Filter manufacturer Sta-Rite
Replaces Sta-Rite WC108-53S1X
Shipping weight 8.9 lb
Ships Parcel

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Customer reviews

Questions and answers

What people ask about this product, answered by our pool techs.

What filter does this fit?
It is listed for Sta-Rite filters as the replacement for element WC108-53S1X. Check the 8-11/16" outside diameter and the 34-1/2" length against the cartridge you are pulling out.
How much filter area does it have?
135 square feet.
Is this a Sta-Rite branded cartridge?
No. It is supplied under the Unicel name with the Unicel number UHD-SR135, and the source listing also describes it as a generic element, so treat it as a replacement rather than a factory Sta-Rite part.
When should a cartridge be replaced instead of cleaned?
Clean it on the normal schedule. Replace it when pressure climbs back quickly after a cleaning, or when the pleats are torn, matted flat or brittle.
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