Fleck 19936SP - Fleck 2510 Seal Adapter

The Fleck 19936SP seal adapter is a genuine replacement component for the Fleck 2510 control valve, sitting between the piston and valve body to maintain a watertight seal, and WrekinWater stocks it as a straightforward fix for 2510 valve owners noticing a leak at this interface.

Technical specifications

Symptoms that mean you need this part

• A persistent drip or leak visible at the piston seal interface on the valve body
• Damp patches forming around the valve housing during or after regeneration
• A slow but steady loss of system pressure between uses
• Visible wear, cracking or deformation on the old seal adapter if the valve has been opened

Why it fails / why it matters

The seal adapter provides the precise sealing surface the piston relies on to keep water contained within its intended flow path as it moves through each stage of the 2510 valve's cycle. Like any rubber-and-plastic component under constant pressure and mineral exposure, it gradually hardens, flattens or cracks with age, and once it can no longer form a tight seal against the piston, water finds its way out at that joint rather than staying inside the valve body, which is what causes the visible leaking many 2510 owners notice.

Why buy this from WrekinWater

WrekinWater has served more than 50,000 customers over 15 years and, from its base in Bettisfield, Shropshire, stocks genuine Fleck, Autotrol, Clack and Kinetico parts, including specific 2510 valve components like the 19936SP seal adapter that keep this popular residential valve sealing correctly. As a UK company (No. 11000488) rated Excellent on Trustpilot, WrekinWater makes it easy to source the small, exact-fit parts that larger suppliers often don't stock.

How to fit it

1. Isolate the water supply and set the valve to bypass
2. Relieve residual pressure from the valve body
3. Remove the valve cap and carefully withdraw the piston assembly
4. Take out the old seal adapter from the valve body and clean the seating area thoroughly
5. Fit the new Fleck 19936SP seal adapter, ensuring it seats squarely before reinserting the piston
6. Reassemble the valve, restore the water supply, take the system off bypass and check the joint for leaks