Product Overview

The Pentair 24850-0102S 21" Bottom Tank Half Kit is the replacement lower tank half for compatible Sta-Rite System:3 filters. It forms the base of the filter housing, so a cracked, warped or leaking bottom half can be replaced without buying a complete new filter. The black tank half is a residential pool part and weighs 43.3 lb.

⚠️ Important Purchase Notice

This is the bottom tank half kit only. Check the model label on your filter and confirm part 24850-0102S in its parts diagram before ordering. 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 lower tank on a Sta-Rite System:3 filter.

• Restoring an older System:3 filter that is otherwise in good working order.

• Pool service professionals repairing residential System:3 equipment.

Key Features

• Genuine Pentair replacement part 24850-0102S.

• 21-inch bottom tank half for Sta-Rite System:3 D.E. and sand filters.

• Black finish to match the original filter housing.

• Backed by a 1-year manufacturer warranty.

Benefits

• Costs far less than replacing the entire filter.

• Lets you keep your existing upper tank, internals and plumbing where they are still sound.

• OEM fit helps the tank seal properly with the matching upper half.

Compatibility

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

• System:3 Modular SMD Series pool and spa D.E. filters

• System:3 SD Series pool and spa D.E. filter, model S7D75

• System:3 SS Series pool and spa sand filters, models S7S50 and S8S70

Confirm your filter model and part number before ordering.

Installation or Upgrade Context

Shut off the pump and relieve pressure in the filter before servicing. The filter must be drained and taken apart to swap the bottom tank half. Inspect the tank O-ring, clamp and internal components at the same time and replace any worn parts. A qualified pool professional should install the tank and pressure-test the filter before returning it to service.

What's Included

• One Pentair 21" bottom tank half kit, part 24850-0102S.

The upper tank half and filter internals 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

Does this include the top half of the tank?

No. This is the bottom tank half only. The upper tank half is sold separately.

Will this fit my S7D75 filter?

Yes. The Sta-Rite System:3 SD Series S7D75 D.E. filter is listed as compatible.

Can I install it myself?

It requires draining and taking apart the filter. We recommend a qualified pool professional install it and pressure-test the filter afterward.