Product Overview

The Pentair 24851-9001 25" Upper Half Tank Lid Kit is the replacement top tank half for compatible 25-inch Sta-Rite System:3 filters. If the upper housing is cracked, leaking or damaged, this kit lets you replace just the top half instead of the whole filter. It is black, made for residential pool filters, weighs 29 lb, and comes with the filter's decals and labels.

⚠️ Important Purchase Notice

This is the upper tank half kit only. Check the model label on your filter and confirm part 24851-9001 before ordering. 21-inch System:3 filters use a different upper tank kit. Large item; inspect the shipment on arrival and report any damage promptly.

WARNING: This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.p65warnings.ca.gov.

Ideal For

• Replacing a cracked or leaking top half on a 25-inch Sta-Rite System:3 filter.

• Restoring a System:3 filter whose lower tank and internals are still in good condition.

• Pool service professionals repairing residential System:3 equipment.

Key Features

• Genuine Pentair replacement part 24851-9001.

• 25-inch upper tank half for Sta-Rite System:3 modular media, D.E. and sand filters.

• Includes the filter's decals and labels.

• Black finish to match the original housing.

• Backed by a 1-year manufacturer warranty.

Benefits

• Costs far less than replacing the entire filter.

• Keeps your existing lower tank, internals and plumbing in service when they are still sound.

• Fresh decals and labels keep the filter's model and safety information readable.

Compatibility

For use with these 25-inch Sta-Rite System:3 filters:

• System:3 modular media filters, models S8M150 and S8M500

• System:3 Modular SD Series pool and spa D.E. filter, model S8D110

• System:3 SS Series pool and spa filter, model S8S70

Confirm your filter model and part number before ordering.

Installation or Upgrade Context

Shut off the pump and release all pressure in the filter before loosening the clamp. Lift off the old upper tank, inspect the tank O-ring, clamp and lower tank half, and replace any worn parts at the same time. A qualified pool professional should install the new top and pressure-test the filter before returning it to service.

What's Included

• One Pentair 25" upper tank half, part 24851-9001.

• Filter decals and labels.

The lower tank half, tank O-ring, clamp and filter elements are separate parts.

Specifications

Warranty

Pentair covers this part with a 1-year manufacturer warranty, subject to Pentair's terms. Contact Pentair for warranty claim instructions; Pool Supply Depot can provide proof of purchase.

Customer Q&A

Will this fit my 21-inch System:3 filter?

No. This kit is for 25-inch System:3 filters. 21-inch models use a different upper tank kit.

Is the clamp or tank O-ring included?

No. The kit includes the upper tank half with decals and labels. The clamp and O-ring are sold separately.

Does it fit the S8M500?

Yes. Pentair lists 24851-9001 as the upper tank half for the S8M150 and S8M500 modular media filters.