Pentair 071442Z filter tank o-ring for 18 inch pool filter tankPentair OEM Filter Tank O-Ring, 18 Inch Tank, 071442Z In stock$5099
Pentair 071442Z filter tank o-ring for 18 inch pool filter tank
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Pentair OEM Filter Tank O-Ring, 18 Inch Tank, 071442Z

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$5099
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Quick overview

  • Genuine Pentair part The factory tank o-ring, part number 071442Z.
  • Sized for 18 inch tanks Fits the 18 inch filter tank, so measure before you order.
  • Stated size 18 in x 9/16 in Pentair gives the o-ring as 18 inches by 9/16 inch.
  • Seals the tank halves This is the seal between the upper and lower tank sections.
  • Replace on every teardown An o-ring that has been compressed for a season rarely reseals as well the second time.
  • Filter part Listed with Pentair PacFab Nautilus Plus DE filter parts.
Full description and specifications ↓

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Product details

The Pentair 071442Z is the filter tank o-ring for 18 inch tanks. Pentair gives the ring as 18 inches by 9/16 inch, and it is listed with the PacFab Nautilus Plus DE filter parts.

What it does

The tank o-ring sits between the upper and lower halves of the filter body and is what the band clamp squeezes to make the tank watertight. It is the only thing holding back full system pressure at that joint, so a flat, nicked or hardened ring shows up quickly as a drip or a spray around the seam.

When to change it

Any time the tank is opened for a grid or cartridge service, put a new o-ring in on reassembly. A ring that has been compressed for a season has taken the shape of the groove and will not seal the same way twice. Measure your tank first, because this one is the 18 inch size.

Specifications
Brand Pentair
Manufacturer part number 071442Z
UPC 788379803162
Type Filter tank o-ring
Fits 18 in tank
Size 18 in x 9/16 in
Listed under Pentair PacFab Nautilus Plus DE filter parts
Shipping weight 0.65 lb
Ships Parcel

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Questions and answers

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

What size tank does this fit?
Pentair lists it for the 18 inch tank, and gives the o-ring itself as 18 inches by 9/16 inch.
Should I replace the o-ring every time I open the filter?
It is the sensible habit. Once an o-ring has been clamped down through a season it takes a set, and a reused one is the most common source of a leaking band clamp.
Which filters is it listed with?
It appears in the Pentair PacFab Nautilus Plus DE filter parts.
Is this the genuine Pentair o-ring?
Yes. It is Pentair part number 071442Z.
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