Pentair 194997Z machined clamp nut for FNS, INS and Quad DE filtersPentair Genuine OEM Machined Nut, 194997Z In stock$1999
Pentair 194997Z machined clamp nut for FNS, INS and Quad DE filters
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Pentair Genuine OEM Machined Nut, 194997Z

Ask a questionMPN 194997Z
$1999
In stock
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Quick overview

  • Genuine Pentair Factory part 194997Z, machined rather than cast to a generic thread.
  • Fits three DE filter families Listed for the Pentair FNS, INS and Quad DE filters.
  • Brass clamp nut The nut that pulls the tank clamp band closed around the filter halves.
  • Metal, not plastic A metal nut holds torque and does not round off the way a worn plastic replacement does.
  • Common wear point Threads gall and corrode over years of seasonal opening, and a nut that will not draw down properly is the usual cause of a weeping clamp.
  • Small part, whole tank The clamp is what keeps a pressurised filter sealed, so this is not a piece to improvise on.
Full description and specifications ↓

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Product details

The Pentair 194997Z is the machined clamp nut used on the FNS, INS and Quad DE filters. It is the genuine Pentair part, described in the factory data as a brass clamp nut.

What it does

A DE filter tank is held together by a clamp band, and the band is drawn closed by a threaded nut. That nut carries the whole clamping load against system pressure. When its threads corrode, gall or strip, the band cannot be pulled down evenly and the tank starts to weep at the split line, usually right after a filter has been opened for a clean.

Before you order

Confirm you have an FNS, INS or Quad DE filter, and inspect the tank o-ring while the filter is open. A leaking split line is often the o-ring rather than the nut, and it is cheap insurance to replace both while the tank is apart.

Specifications
Brand Pentair
Manufacturer part number 194997Z
UPC 788379693671
Type Machined clamp nut
Part type Pool filter part
Material Metal
Fits Pentair FNS, INS and Quad DE filters
Shipping weight 0.15 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 nut fit?
It is listed for the Pentair FNS, INS and Quad DE filters.
What does the nut actually do?
It is the clamp nut. It threads onto the clamp assembly and draws the band tight so the two halves of the filter tank seal against the tank o-ring.
Is it metal or plastic?
Metal. The source data lists it as a metal part and describes it as a brass clamp nut.
My clamp still weeps after I tighten it. Is this the fix?
It can be. A nut with damaged or corroded threads will not pull the band down evenly. Look at the tank o-ring at the same time, since a flat or nicked o-ring leaks no matter how well the clamp is torqued.
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