A happy pool is a clean pool. Remove dirt and debris from your water by keeping your cartridge filter working its best with the Unicel UHD-SR138 Hot Tub Spa Filter Cartridge Replacement.
This replacement spa filter cartridge measures 8.68 inches in diameter and 34.5 inches tall. This replacement filter cartridge is Unicel part number UHD-SR137. Use this replacement pool filter cartridge to replace the Sta-Rite T-135TX cartridge in Posi-flo filters.
This spa replacement part features an open-top end cap with 4.18 inches inner diameter and an open bottom end cap with 12 concentric slots and a 4.18-inch inner diameter. Make sure you can match these up to your spa’s cartridge filter before purchase.
Made for efficient and effective cleaning, this pool and spa filter cartridge features fine filter media. The filter cartridge sports 195 pleats and can cover up to 135 square feet of pool water.
- Keep your spa water clean with this replacement filter cartridge (part number: UHD-SR138)
- Measure 8.68 inches in diameter and 34.5 inches tall
- Replaces the Sta-Rite T-135TX cartridge in Posi-flo filters
- Features fine filter media with 195 pleats that can cover up to 135 square feet
- Features open top end cap with a 4.18-inch inner diameter and open bottom end cap with 12 concentric slots and 4.18-inch inner diameter
- Color: White
- Dimensions (L x W x H): 8.7 x 8.7 x 34.5 inches
Questions? We’ve Got Answers.
Helpful answers about product features, setup, and more
How big is the filter cartridge?
The filter cartridge measures 8.7 x 8.7 x 34.5 inches (length x width x height). Use these measurements to plan setup space and confirm the product fits your yard or outdoor area.
What is the filter cartridge used for?
The filter cartridge is used for backyard recreation and outdoor enjoyment. It is designed for use in yards, garden spaces, or other open outdoor areas where there is room for setup and active use.
Who makes the filter cartridge?
The filter cartridge is made by Unicel. Unicel produces this item as part of its lineup, and product details such as specifications, included accessories, and warranty terms are set by the brand.
What should I know about the filter cartridge before buying?
The filter cartridge from Unicel brings together a few practical features worth highlighting:
- practical design
- everyday usability
- straightforward maintenance
Review the product description and specifications to confirm it matches your specific needs before placing your order.
How will the filter cartridge be delivered?
The filter cartridge ships from one of our fulfillment centers using standard ground or freight carriers depending on the size and weight of the item. Larger or heavier items may ship freight with curbside delivery. Estimated delivery dates and shipping methods are shown at checkout before you complete your order.
What is the return policy for the filter cartridge?
The filter cartridge can be returned in line with our standard return policy. Most items are eligible for return within the return window stated on our site, provided they are unused and in original condition. Review the return policy linked at checkout or in the site footer for specifics before ordering.
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