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

Shipping Information

VMInnovations is proud to offer fast, free shipping every day. Items are typically delivered between 1-3 days.

Most orders placed before 2:00 PM CST ship the same day.

Free Shipping Details

• Our free shipping service is standard ground shipping with FedEx, USPS, or a regional carrier.
• Items are usually delivered in 1-3 days, but some may take up to 5 days.
• Some orders may require a signature before delivery.
• At this time, we only offer free shipping inside the 48 continental United States.
• Free shipping is not available for APO/FPO.
• Some items can be shipped to Alaska, Hawaii, or Puerto Rico. Please note free shipping does not apply to these locations. You will need to select the AK/HI/PR shipping in your cart.
• We are currently unable to ship items internationally.

Freight Shipping Information (LTL)

Some items are too large to be shipped with a regional carrier, FedEx, or USPS, and we ship these items with our freight carriers.

Please read the information below so you fully understand the delivery process and requirements.

Required Actions

We will need your phone number for the delivery. The carrier will need to call you in order to set up a delivery time. Please make sure the number you provide during checkout is the best one to reach you. If paying with PayPal, please make sure the number on your account is accurate.

You'll need to inspect your package upon arrival before you sign. If your order arrives damaged, you should sign "DAMAGED" on the delivery receipt. If the item is damaged to the point that it is not usable, you can refuse the item.

Please notify and, if possible, send photos of any damage to vminnovations_help@email.spreetail.com, along with your order number. A member of our Customer Experience team will reach out to you with further instructions.

Delivery Information

At this time, we do not offer "in-home" deliveries. Your shipment must be delivered to the curbside and will require a signature. Please be sure you are able to move the item after it arrives, as the carrier will not be able to assist.

We do our best to ship orders as fast as we can. If you need to cancel your order, please let us know as soon as possible by calling our Customer Experience team at 866-639-9320. Please note that if we are unable to cancel your order before it ships, you will be responsible for the shipping charges.

If the item is returned from the freight company for any reason other than damage, additional shipping or storage fees may apply. Reasons may include invalid or incorrect address information, and incorrect phone number or contact information, or failing to schedule or missing an already scheduled delivery appointment.

If the item is delivered and a return is requested, the freight shipping fees will be deducted from the final refund amount.