Pentair 154575Z 8-1/2 inch buttress thread top closure for Triton sand filtersPentair Genuine OEM 8-1/2" Buttress Thread Top Closure, 154575Z In stock$7099
Pentair 154575Z 8-1/2 inch buttress thread top closure for Triton sand filters
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Pentair Genuine OEM 8-1/2" Buttress Thread Top Closure, 154575Z

Ask a questionMPN 154575Z
$7099
In stock
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Quick overview

  • Genuine Pentair part Factory part number 154575Z, matched to the tank thread.
  • 8-1/2 inch closure Measure the opening on your filter tank, since Pentair used more than one closure size across the range.
  • Buttress thread The coarse buttress profile is what lets a closure this size hold system pressure and still come off by hand.
  • Called out for TR100C and TR140C Listed as the closure for the Triton C commercial sand filters in those two sizes.
  • Also grouped with Triton II It appears in the Triton II and Triton C-3 side mount filter parts listings as well, so confirm the size against your tank.
  • O-ring sold separately The square closure o-ring is a different part number and is worth replacing at the same time.
Full description and specifications ↓

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Product details

The Pentair 154575Z is the 8-1/2 inch buttress thread top closure for Triton side mount sand filters. It is the genuine Pentair part.

What it is

The closure is the large threaded lid at the top of the tank, the one that comes off when you need to reach the sand or the internal piping. The buttress thread form carries the pressure load on one side of the thread while staying easy enough to turn by hand, which is what makes a lid of this diameter practical.

Check the size and the model

The source material lists this closure two ways: specifically for the Triton C commercial filters TR100C and TR140C, and more broadly with the Triton II and Triton C-3 side mount parts. We have kept both readings rather than choosing one. Measure the threaded opening on your tank and confirm it is 8-1/2 inches.

The square closure o-ring is a separate part. A closure only holds because that o-ring is soft and unmarked, so plan on fitting a new one at the same time.

Specifications
Brand Pentair
Manufacturer part number 154575Z
UPC 788379669164
Type Top closure, buttress thread
Size 8-1/2"
Part type Pool filter part
Listed for Pentair Triton C sand filters, models TR100C and TR140C
Also cataloged under Pentair Triton II and Triton C-3 side mount sand filter parts
Shipping weight 1.45 lb
Ships Parcel

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Questions and answers

What people ask about this product, answered by our pool techs.

Which filters does this closure fit?
The source lists it two ways. It is called out specifically for the Triton C sand filters, models TR100C and TR140C, and it is also cataloged with the Triton II and Triton C-3 side mount sand filter parts. Measure the threaded opening on your tank and confirm it is 8-1/2 inches before ordering.
Does it come with the o-ring?
No. The square closure o-ring is a separate Pentair part number. Since the closure only seals as well as that o-ring does, replace both together.
What is a buttress thread?
It is a coarse, asymmetric thread form used on large filter closures. It carries the pressure load on one flank while staying easy to turn, which is why a lid this size can be hand tightened.
Is it a genuine Pentair part?
Yes. It is the Pentair OEM closure, part number 154575Z.
Ask your own question