Unicel UHD-SR137 Filter Cartridge – 137 sq ft Media

The Unicel UHD-SR137 is a high-capacity pleated cartridge filter element rated at approx. 137 square feet of media surface. With an outer diameter of about 8⅝″ and a length of approximately 31¼″, it is designed to fit compatible in-ground pool filter systems requiring this size.

Key Features

Approx. 137 sq ft of filtration media for extended run-time and reduced cleaning frequency.
Dimensions: ~8⅝″ (8.6875″) outside diameter × ~31¼″ (31.25″) length.
Open end-caps both ends for top or bottom manifold fit (verify specifics for your system).
Heavy-duty polyester pleated construction for durability and high flow performance.

Technical Specifications

Part Number: UHD-SR137
Media Area: ~137 sq ft
Approx. Dimensions: ~8⅝″ OD × ~31¼″ length
End Cap Style: Open both ends (~4⅛″ ID each) (confirm exact ID with your filter manifold)
Application: Replacement cartridge for filters originally using this size—verify filter model compatibility.

Installation & Use Notes

Prior to installation, shut off the pool pump and relieve all system pressure. Open the filter tank and remove the old cartridge element. Clean the tank interior of debris and inspect the manifold or base plate. Insert the new UHD-SR137 cartridge, making sure it seats evenly and aligns with the manifold ports. Replace the lid, re-pressurize the system, and monitor the pressure gauge to confirm normal operation.

Maintenance Tips

Rinse the cartridge periodically when differential pressure rises above your normal operating range.
Replace the cartridge when media becomes damaged, pleats collapse, or cleaning no longer restores proper flow and pressure.
Keep a replacement cartridge handy in your inventory to minimize downtime during service calls.

Why Choose This Cartridge?

For pool service professionals, supply stores and proactive homeowners, the UHD-SR137 offers a reliable, direct-fit replacement option with high media area—and helps maintain clearer water, better flow and less frequent maintenance.

Hours Of Operation:

Monday - Friday: 8:00 am to 4:00 pm Phoenix Time

Saturday and Sunday: Closed

Orders costing more than $300 WILL be required to have signature confirmation upon delivery.
Handling time is typically only 1 day.
Any item ordered after 1pm Phoenix time, may not ship same-day.
Call us if you require expedited shipping and we can give you quotes based on your needs.

Return Policy:

All products, except as noted below, are eligible for return up to 30 days after receipt of item.
For returns, an RMA form must be filled out HERE or customers can call for additional help.
Shipping costs will be deducted from all returned items.
Any item that is missing accessories, original packaging, or is not returned in the same condition that it was received in, may be subject to a re-stocking fee up to 100% based on the condition we receive it in.
Items broken, damaged, or inoperable due to installer error will not be refunded.
Fill out the return form or give us a call to obtain an RMA and return shipping label.
There are no returns on the Pentair Colorsync 618031
No returns on pool cleaners.
No returns on opened seals and o-rings.
No returns on capacitors.
If a light is returned because it "doesn't work" and it tests fine, the cost to ship and a re-stocking fee will be deducted from the refund.
All products denied upon arrival at customers house WILL be charged the cost to ship.
Visa Gift Card Promotions: Gift cards are sent within 14 days of the order. When accepting the Visa Gift card, you agree that if your order is returned or refunded, this amount will be deducted from the refunded amount. All Visa Gift cards are sent via email in an E-Gift Card format and are non refundable.