Pentair 195339 stainless steel back-up ring for PacFab filtersPentair Genuine OEM Back-Up Ring, Stainless Steel, 195339 In stock$8299
Pentair 195339 stainless steel back-up ring for PacFab filters
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Pentair Genuine OEM Back-Up Ring, Stainless Steel, 195339

Ask a questionMPN 195339
$8299
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Quick overview

  • Genuine Pentair Factory part 195339, not a generic ring.
  • Stainless steel Metal construction, so it holds its shape and does not corrode in pool water.
  • Supports the o-ring A back-up ring stops the o-ring extruding out of its groove when the filter is under pressure.
  • Filter parts listing Pentair carries it in the PacFab FNS Plus DE and Quad DE parts diagrams.
  • Also grouped with Clean and Clear Plus It is listed in the Clean and Clear Plus cartridge filter parts group as well.
  • Fit it with a new o-ring The ring and the seal it backs are a pair, so change both while the filter is open.
Full description and specifications ↓

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Product details

The Pentair 195339 is a stainless steel back-up ring, a small metal part with one job: to sit behind an o-ring so the seal cannot be forced out of its groove when the filter comes up to pressure.

Why filters use them

An o-ring on its own can extrude through a gap under enough pressure, and once it has been pinched or nibbled it will never seal properly again. The rigid back-up ring closes off that escape path. It is one of those parts that goes unnoticed until it is missing or distorted, at which point the filter starts weeping at a joint that keeps failing no matter how many new o-rings go in.

Before you order

The Pentair sources list this part in more than one place: it appears in the PacFab FNS Plus DE and Quad DE parts diagrams, and it is also grouped with Clean and Clear Plus cartridge filter parts. Check it against the exploded view for your own filter, and plan on fitting a new o-ring at the same time.

Specifications
Brand Pentair
Manufacturer part number 195339
UPC 788379694654
Type Back-up ring
Material Stainless steel
Part type Pool filter part
Listed for Pentair PacFab FNS Plus DE filter, Pentair Quad DE filter
Also grouped with Pentair Clean and Clear Plus cartridge filter parts
Shipping weight 1.02 lb
Ships Parcel

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Questions and answers

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

What does a back-up ring do?
It sits behind the o-ring and gives it something solid to press against, so filter pressure cannot push the soft seal out of its groove.
Which filters is it listed for?
The parts diagrams put it on the Pentair PacFab FNS Plus DE and the Quad DE filters. It is also grouped under Clean and Clear Plus cartridge filter parts, so confirm against your own filter before ordering.
What is it made of?
Stainless steel.
Do I need a new o-ring as well?
Yes, if the filter has been apart. The back-up ring only works with a sound o-ring in front of it, and the seal is the part that ages.
Ask your own question