
Quick overview
- Quad ring profile A four lobe seal section rather than a round O-ring section.
- Size O-389 The O-389 seal used at the multiport valve lid.
- Fits 501501 and 501601 Used on the Pentair American Products 1-1/2 inch side mount multiport valves.
- Genuine Pentair Factory part 51001000.
- Seals the lid It closes the joint at the cover on top of the valve, which is where a tired seal shows itself first.
- Cheap while you are in there Worth changing any time the valve lid comes off for a spider gasket or diverter job.
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Product details
Pentair 51001000 is the O-389 quad ring that seals the lid on the 1-1/2 inch American Products side mount multiport valve.
Quad ring, not an O-ring
A quad ring has a four lobe cross section rather than a round one. It fits the same groove as an O-ring but it is less inclined to twist or roll when a cover is turned down onto it, which is exactly the duty a valve lid asks for.
Where it is used
The seal is listed for the Pentair American Products side mount multiport valves 501501 and 501601 in the 1-1/2 inch size. It sits at the lid, which is the joint that starts to seep once the seal has hardened.
Worth doing together
If the valve is coming apart for a spider gasket or a diverter, put a fresh lid seal in at the same time. It is the smallest part of the job and the one most likely to bring you back if it is skipped.
| Brand | Pentair |
|---|---|
| Manufacturer part number | 51001000 |
| UPC | 788379693756 |
| Type | Quad ring |
| Size | O-389 |
| Location | Multiport valve lid |
| Fits | Pentair American Products 1-1/2" side mount multiport valves 501501 and 501601 |
| Part type | Filter valve part |
| Shipping weight | 0.5 lb |
| Ships | Parcel |
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