Unicel Replacement Filter Cartridge 137 sf Sta-Rite PMT135 | UHD-SR137
Unicel
SKU: UHD-SR137
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.
Questions about returns? View our return policy.
Hours Of Operation:
Monday - Friday: 7:00 am to 5:00 pm Phoenix Time
Saturday: 8:00 am to 2:00 pm
Sunday: Closed
- We do not ship on Saturday or Sunday.
- Orders totaling more than $300 will require signature confirmation upon delivery.
- We process and prepare orders for shipment within 1 business day. Please note that many other pool supply retailers require 3–5 days of handling time before shipping.
- Orders placed after 1:00 pm Phoenix Time may not be eligible for same-day shipment.
- Expedited shipping options are available at checkout.
Return Policy:
- Products that are received damaged will receive a refund in store credit.
- Most products are eligible for return within 30 days of receipt, except where noted below.
- To initiate a return, please complete an RMA form prior to sending your item back.
- Original shipping costs are non-refundable and will be deducted from the return credit.
- Items returned missing accessories or original packaging, or that are not in the same condition as received, may be subject to a restocking fee of up to 100% depending on the condition of the item upon return.
- Some returns will be charged an automatic 15% restocking fee.
- We are unable to issue refunds for items that have been damaged or rendered inoperable due to installer error.
- Please complete the return form to receive your RMA number and return shipping label.
- Chemical products are not eligible for return under any circumstances.
- The Pentair Colorsync 618031 is not eligible for return.
- Pool cleaners are not eligible for return.
- Opened seals and o-rings are not eligible for return.
- Capacitors are not eligible for return.
- Plastic popup tools are not eligible for return.
- Automation components and circuit boards are not eligible for return.
- If a light is returned due to a reported malfunction and is found to be fully operational upon testing, return shipping costs and a restocking fee will be deducted from the refund.
- Orders refused at the time of delivery will be subject to the original shipping costs being deducted from the refund.
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