Unicel UHD-SR70 70 sq ft replacement filter cartridge for Sta-Rite Posi-Flo II PTMUnicel UHD-SR70 Replacement Cartridge, 70 sq ft In stock$8799
Unicel UHD-SR70 70 sq ft replacement filter cartridge for Sta-Rite Posi-Flo II PTM
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Unicel UHD-SR70 Replacement Cartridge, 70 sq ft

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$8799
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Quick overview

  • For the Sta-Rite TX-70 Built as the replacement element for the Posi-Flo II PTM TX-70 cartridge filter.
  • Unicel built Unicel is the long standing aftermarket cartridge maker, not a no name element.
  • Measured fit 8-11/16 in outside diameter and 18-3/16 in long, so it seats the way the original did.
  • Rated area Listed at 70 square feet, and shown as 72 square feet in some of the same data.
  • Whole element Supplied as the complete cartridge, media, core and end caps.
  • Change on condition A cartridge that will not come clean, or has torn pleats, is costing you flow and filtration.
Full description and specifications ↓

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Product details

The Unicel UHD-SR70 is the replacement cartridge element for the Sta-Rite Posi-Flo II PTM TX-70 filter. It measures 8-11/16 inches outside diameter by 18-3/16 inches long and drops straight into the tank in place of the original element.

On the square footage

You will see this cartridge listed at both 70 and 72 square feet. The 70 is the model designation, TX-70, and it is how the filter itself is sold. The 72 is a media area figure that appears in the same manufacturer data. Either way it is the correct element for that tank, and the physical dimensions above are what determine the fit.

When to change it

Cartridges are cleaned, not replaced, until cleaning stops working. Once a full soak and rinse no longer brings the pressure back down, or the pleats have torn, or the end caps have started to pull away from the media, the element is finished. Running past that point costs you flow, shortens pump life and lets dirt straight back to the pool.

Specifications
Brand Unicel
Manufacturer part number UHD-SR70
UPC 678285190282
Type Replacement cartridge element
Square footage 70
Also listed as 72 sq ft
Outside diameter 8-11/16"
Length 18-3/16"
Filter manufacturer Sta-Rite
Fits Sta-Rite Posi-Flo II PTM, TX-70
Shipping weight 5.45 lb
Ships Parcel

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Customer reviews

Questions and answers

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

Is this 70 or 72 square feet?
Both numbers appear against this element. The part is the UHD-SR70 and it is sold as the 70 square foot cartridge for the TX-70, while some manufacturer data lists the media area as 72 square feet.
Which filter does it fit?
The Sta-Rite Posi-Flo II PTM cartridge filter, TX-70.
What are the dimensions?
8-11/16 inches outside diameter by 18-3/16 inches long.
How often should a cartridge be replaced?
Clean it on a schedule and replace it when a proper soak and rinse no longer restores pressure, or when the pleats tear or the end caps separate. A tired cartridge shows up as short filter runs and a pressure gauge that climbs again within days.
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