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B&Q£7.22Visit shop - 20mm Mdpe Straight Coupling Compression Fitting Pn10 For Water And Irrigation Systems
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The B&Q 40mm MDPE Straight Coupling is an essential component for plumbers and DIY enthusiasts needing to connect two lengths of 40mm MDPE pipe securely. Designed for efficiency and durability, it offers a high-performance, leak-resistant seal for mains water and irrigation systems, though it requires precise pipe preparation to ensure a watertight fit.
| Model Part Number | MDPESTR40001 |
|---|---|
| Brand | B&Q |
No, the compression mechanism is designed to create a seal through mechanical pressure on the internal gasket. Additional tape can sometimes interfere with the fit.
This fitting is designed for cold water supply and irrigation systems. Check your system specifications before use in high-temperature applications.
Yes, compression fittings can generally be disassembled and reused, provided the internal seal/O-ring remains in good condition.
Most couplings have an internal pipe stop. You will feel the pipe hit a solid internal shoulder when it is inserted to the correct depth.
While hand-tightening is often sufficient, a strap wrench or pipe wrench may be used for a final firm turn if necessary.
Unscrew the coupling and check that the internal O-ring is seated correctly and that the pipe end is not scratched or jagged.
Ensure the pipe end is clean and cut squarely; use a small amount of pipe lubricant if necessary to help it pass the internal seal.
Ensure the threads are aligned correctly; cross-threading can cause the nut to seize. Back it off and retry starting the thread slowly.
To install, ensure the 40mm pipe is cut perfectly square using a pipe cutter. Slide the nut and split ring over the pipe, insert the pipe into the coupling body until it hits the internal stop, and tighten the nut by hand or with a wrench until firm. The fitting is compatible with standard 40mm MDPE piping. For maintenance, periodically check that the nut remains tight, especially if the system experiences significant thermal expansion or ground movement. Avoid using abrasive tools that might damage the outer surface of the fitting.
