Pentair Genuine OEM Adapter 8-1/2" Buttress Threaded In stock$7799
Quick overview
- Genuine Pentair The factory 154521 adapter, not an aftermarket substitute.
- Buttress thread A buttress thread form, which will not mate with a standard straight or tapered thread.
- 8-1/2 inch The adapter size Pentair gives, so confirm the thread diameter on your filter before ordering.
- Filter valve part Pentair classifies it as a filter valves part and stocks it alongside multiport valve components.
- Check the seals The adapter is a single part number, so inspect any o-ring or gasket seating against it while the filter is open.
- OEM dimensions Because it is the factory part, the thread and shoulder match what came off.
Similar products
Other products people compare with this one.
Product details
The Pentair 154521 is an 8-1/2 inch buttress threaded adapter, supplied as a genuine Pentair part and classified by Pentair as a filter valves part.
What a buttress thread is
A buttress thread has an asymmetric profile rather than the symmetrical vee of a normal pipe thread. Large diameter filter and valve joints use it because it holds firmly under load in one direction while still being easy to start by hand on a wide thread. The important consequence for a buyer is that it is not interchangeable. A buttress threaded adapter will not screw into a standard tapered or straight thread of the same nominal size, so measure and identify the thread on your equipment before ordering.
Before you fit it
This listing covers the adapter on its own. Any o-ring or gasket that seats against it is ordered separately, and while the filter is already open is the cheapest moment to inspect one and replace it if it has taken a set. Fitting the genuine part means the thread pitch, diameter and shoulder match what came off, without the trial fitting that an aftermarket substitute usually involves.
| Brand | Pentair |
|---|---|
| Manufacturer part number | 154521 |
| UPC | 788379669058 |
| Type | Adapter |
| Size | 8-1/2" |
| Thread | Buttress |
| Part type | Filter valves part |
| Shipping weight | 1 lb |
| Ships | Parcel |
Request a quote
Need a volume price, a freight quote, or pricing in writing before you order? We reply the same business day.
Customer reviews
More from Pentair
Questions and answers
What people ask about this product, answered by our pool techs.