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Fleck 28416-US Piston Assembly 2910 Upper

Fleck 28416-US Piston Assembly 2910 Upper

0401328115

£44.00 inc. VAT
£36.67 ex. VAT
£44.00 inc. VAT
£36.67 ex. VAT
Shipping calculated at checkout.
Shipping is calculated at checkout
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Product Description

WrekinWater stocks the Fleck 28416-US Upper Piston Assembly for the Fleck 2910 softener valve, a genuine Pentair Fleck replacement part for the upper piston stage, aimed at anyone whose softener has started weeping from the top of the valve or letting hardness through part-way into a cycle.

Technical specifications

Part Number 28416-US
Compatible Valve Fleck 2910
Position Upper piston
Assembly Type Complete piston with seals
Material Engineered polymer piston with NBR seals
Brand Pentair Fleck

Symptoms that mean you need this part

  • Water weeping from the upper section of the valve body around the piston
  • Hardness intermittently breaking through, particularly noticeable mid-cycle
  • Visible wear grooves, flat spots or scoring when the old upper piston is removed
  • A knocking or grinding sound from the upper valve stack during regeneration

Why it fails / why it matters

The upper piston on a 2910 valve controls the flow path during each stage of regeneration and takes repeated frictional wear against the bore every time the valve indexes. As the seal surface wears down with use, it stops making a clean seal between positions, letting water leak past or allowing hardness to bypass the resin bed at certain points in the cycle.

Why buy this from WrekinWater

WrekinWater has supplied genuine Fleck spares to more than 50,000 customers over 15 years from our base in Bettisfield, Shropshire, and stocks Pentair Fleck alongside Autotrol, Clack, Kinetico and other major brands, so this upper piston is matched correctly to the 2910 valve. We're UK Company No. 11000488, rated "Excellent" on Trustpilot.

How to fit it

  1. Isolate the softener at the inlet and relieve system pressure before starting
  2. Remove the valve cover and drive assembly to access the upper piston
  3. Withdraw the old upper piston and inspect the seal surface for wear, grooves or hardened rubber
  4. Clean the valve bore thoroughly to remove any scale or debris
  5. Lubricate the new piston assembly with a silicone-based lubricant approved for potable water and fit it in place
  6. Reassemble the drive assembly, restore the water supply, and run a manual regeneration to confirm correct operation with no leaks

Frequently asked questions

This is the upper piston assembly only. If your softener also shows signs of wear lower in the valve, you'll need the separate lower piston assembly.

Yes, this is a complete piston assembly supplied with its seals already fitted, ready to install as a single unit.

If the old piston shows visible grooves, flat spots or scoring when removed, the piston itself has worn and a seals-only kit won't fully resolve the leak.
Fleck 28416-US Piston Assembly 2910 Upper

Fleck 28416-US Piston Assembly 2910 Upper

£44.00 inc. VAT
£36.67 ex. VAT
£44.00 inc. VAT
£36.67 ex. VAT