Pentair 154521 Flange Valve Adapter 6 TPI 8.5"
Pentair 154521 Flange Valve Adapter 6 TPI 8.5"
Tired of a worn out or leaking backwash? The Pentair 154521 Flange Valve Adapter creates the seal between your multiport valve and the sand filter dome. This part typically needs replacement after disassembling the unit.
Who is this for?
Pool technicians replace this adapter when the threads on a fiberglass sand filter no longer seal water. This part can be installed by home owners as well; Swap it during a valve rebuild rather than replacing the whole tank.

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Key Features
- Direct fit for Pentair Tagelus TA 100 and TA 100D fiberglass sand filter tanks
- Also fits Pentair top mount and side mount multiport valves
- Buttress thread pattern matches OEM tank threads for a leak-free seal
- Measures 8-1/2 inches across the flange
Technical Specifications
- Thread type: Buttress
- Thread count: 6 TPI
- Diameter: 8-1/2 in
- Compatible models: Tagelus TA 100, TA 100D
- Manufacturer part number: 154521
Specs
- Part Number: 154521
- Manufacturer: Pentair
Pro Tip: Pentair 154521 Flange Valve Adapter 6 TPI 8.5"
Check your existing adapter's thread count before ordering. Pentair uses more than one buttress thread pattern across its Tagelus filter line.
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What our customers are saying
Online help made this happen it was fast and convient prices were fair
Online help made this happen it was fast and convient prices were fair
Christopher D
Easy to order and arrived on time.
Easy to order and arrived on time.
David F
Fast ship, salt cell was vital to get replaced! Thank you
Fast ship, salt cell was vital to get replaced! Thank you
Stacie S
FAQ
Our expert staff answers customer's most asked questions.
Is this part OEM? Or from the manufacturer?
Yes this part is original, from the manufacturer, and contains a manufacturer part number.
Does this part come with any warranty?
Replacement parts do not come with a warranty, although many of our equipment comes with a manufacturer warranty.
Is installation simple?
Pentair makes it easy to install their replacement equipment, with numerous guides and videos available online.
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