Pentair 172855 genuine OEM strainer air vent, 3/4 inch air relief screenPentair Genuine OEM Strainer Air Vent, 172855 In stock$2999
Pentair 172855 genuine OEM strainer air vent, 3/4 inch air relief screen
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Pentair Genuine OEM Strainer Air Vent, 172855

Ask a questionMPN 172855
$2999
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Quick overview

  • Genuine Pentair part OEM part number 172855, the factory air relief strainer.
  • The 3/4 inch size Pentair makes three of these screens and they differ by dimension and base hole. This is the 3/4 inch hole version.
  • Metal mesh screen The screen material is a metal mesh, similar in weave to a screen door, bonded to a rubber base.
  • Fits the OEM manifold Designed for the OEM manifold on most FNS, FSH, Nautilus and Nautilus Plus DE filters.
  • Keeps DE out of the vent The screen is what stops filter media climbing into the air relief tube every time you bleed the filter.
  • Measure before you order Diameter 1-3/4 inch, height 1-1/2 inch, hole 3/4 inch. Check yours against these before choosing.
Full description and specifications ↓

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Product details

The Pentair 172855 is the genuine OEM air relief strainer, the 3/4 inch screen used at the air relief point on PacFab DE filters. It fits the OEM manifold on most FNS, FSH, Nautilus and Nautilus Plus filters.

What it is

The part is a round metal mesh screen bonded to a rubber base. The mesh is close to what you would find in a screen door: fine enough to hold filter media back, open enough to let air pass. It is a small part doing an unglamorous job, and when it tears or packs solid the air relief stops working properly.

Getting the right one

Pentair builds three screens in this style. They look alike, but each is matched to a different tube size, so both the outside dimensions and the hole in the bottom of the rubber base differ. This one measures 1-3/4 inch in diameter and 1-1/2 inch high, with a 3/4 inch hole. Measure the one you are pulling out before you order, since the two other versions will not seal correctly on the wrong tube.

Specifications
Brand Pentair
Manufacturer part number 172855
UPC 788379693343
Type Air relief strainer, 3/4"
Part type Pool filter part
Material Metal
Diameter 1-3/4"
Height 1-1/2"
Hole size 3/4"
Fits OEM manifold on most Pentair PacFab FNS, FSH, Nautilus and Nautilus Plus DE filters
Shipping weight 0.05 lb
Ships Parcel

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Questions and answers

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

How do I know I need the 3/4 inch one?
Pentair makes three air relief screens in this style. They differ in overall dimensions and in the hole in the bottom of the rubber base, because each suits a different tube size. Measure the hole on the one you are replacing: this listing is the 3/4 inch.
What is it made of?
A metal mesh screen bonded to a rubber base. The mesh is close in character to the screen on a screen door.
Which filters take it?
It fits the OEM manifold on most Pentair PacFab FNS, FSH, Nautilus and Nautilus Plus DE filters.
What is its job?
It sits at the air relief point and lets air out while keeping filter media and debris from packing into the relief tube.
Ask your own question