Pentair 274421Z waste seal spring for FullFloXF backwash valvePentair FullFloXF Backwash Valve Waste Seal Spring, 274421Z In stock$1799
Pentair 274421Z waste seal spring for FullFloXF backwash valve
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Pentair FullFloXF Backwash Valve Waste Seal Spring, 274421Z

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$1799
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Quick overview

  • Genuine Pentair Factory part 274421Z for the FullFloXF backwash valve.
  • Waste seal spring The spring behind the waste seal, sold on its own.
  • FullFloXF specific Listed for the Pentair FullFloXF backwash valve, not the older FullFlo bodies.
  • Sold separately from the seal The waste seal itself is a different part, so order both if the seal is worn too.
  • Restores seal pressure A tired or broken spring lets the waste seal sit loose, which is a common cause of water passing to waste.
  • Small part worth stocking Cheap enough to have on the shelf when a valve rebuild is on the calendar.
Full description and specifications ↓

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Product details

The Pentair 274421Z is the waste seal spring for the FullFloXF backwash valve. It is the genuine Pentair part.

What it does

Inside the valve, the waste seal has to be held firmly against its seat to keep water from bleeding out to waste while the system is in filter. The spring is what supplies that load. When it weakens or breaks, the seal sits loose and water starts finding its way to the waste line even though the handle says otherwise.

Before you order

This listing is the spring alone. The FullFloXF waste seal is a separate part, and the two normally wear as a pair. If you have the valve open, look at the seal face before you decide to order just the spring.

Specifications
Brand Pentair
Manufacturer part number 274421Z
UPC 788379855604
Type Waste seal spring
Fits Pentair FullFloXF backwash valve
Sold as Spring only
Shipping weight 0.13 lb
Ships Parcel

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Questions and answers

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

Does this include the waste seal?
No. This is the spring only. The FullFloXF waste seal is a separate Pentair part.
Which valve does it fit?
The Pentair FullFloXF backwash valve.
Is it a genuine Pentair part?
Yes. It is the Pentair OEM part, number 274421Z.
Water keeps running to waste, is the spring the problem?
It can be. The spring loads the waste seal against its seat, and a broken or weakened spring lets the seal sit loose. Inspect the seal at the same time, since the two usually wear together.
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