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Professional Building Supplies£25.85Visit shop Hydrodif Blue/Black Mdpe Stop Valve Quarter Turn - 25Mm
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B&Q£37.54Visit shop B&Q - Hydrodif Mdpe Quarter-Turn Isolating Stop Valve 25mmPolypropylene1/4 Turn Shut-Off
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The Hydrodiff MDPE Quarter-Turn Isolating Stop Valve (MD25ST) is an essential component for plumbers and DIY enthusiasts managing water flow in 25mm MDPE pipe systems. Providing a swift and reliable way to isolate water supplies, it is suitable for both blue potable and black non-potable pipe applications; however, it requires the use of appropriate pipe liners to ensure a pressure-tight, leak-resistant connection.
| Model Part Number | MD25ST |
|---|---|
| Brand | Hydrodif |
No, this valve is specifically engineered for 25mm MDPE plastic piping systems.
Yes, pipe liners are essential for MDPE fittings to prevent the pipe from crushing and to ensure a permanent, leak-proof seal.
Yes, it is suitable for use with blue MDPE pipe, which is standard for potable water supplies.
The valve is designed to meet standard pressure ratings for typical MDPE water distribution systems; consult your specific local plumbing regulations.
The materials are designed for durability, but ensure you follow local building codes regarding access to shut-off valves for future maintenance.
Ensure a pipe liner is installed correctly inside the MDPE pipe and check that the compression nut is tightened firmly.
Check for debris or grit buildup around the handle mechanism and clean with water; do not force the handle if it feels seized.
Verify that the pipe is inserted fully past the internal O-ring seal and that the compression nut is fully tightened.
For a successful installation, ensure the 25mm MDPE pipe is cut squarely and the outer surface is clean and free of burrs. It is mandatory to insert a pipe liner into the end of the MDPE pipe before tightening the valve’s nut. This liner reinforces the pipe wall, preventing deformation during compression. To care for the valve, avoid using abrasive chemical cleaners. Periodically check for any signs of moisture around the connection points, particularly after significant temperature fluctuations, and ensure the valve handle remains clear of debris or obstructions to maintain ease of use.
