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The Fluidmaster 40mm 90 degree waste pipe elbow is designed for DIY homeowners and professional plumbers seeking a reliable, leak-free connection for 40mm waste systems. Its primary benefit is the universal compression multi-fit design, which allows for quick installation on various pipe materials without the need for messy solvent welds. Note that while this fitting is highly versatile, it is specifically sized for 40mm pipes and will not fit standard 32mm systems without an adapter.
| Model Part Number | 40mm 90 Deg Knuckle Elbow |
|---|---|
| Brand | Fluidmaster |
No, this fitting is specifically sized for 40mm pipe. Using a 32mm pipe will result in a poor seal and leaks.
No, this is a compression fitting. It relies on the internal washer and nut to create a seal, meaning no adhesives are required.
Yes, it is designed for typical residential waste water, which includes hot water from sinks and basins.
Yes, one of the primary advantages of this compression fitting is that it can be unscrewed and reused or repositioned.
In most cases, you only need your hands to tighten the nut. A pipe cutter or fine-toothed saw is needed to prep your pipes to length.
Ensure the pipe is pushed in deep enough past the compression seal and confirm the washer is not pinched or misaligned.
Check for cross-threading; unscrew fully, realign the nut with the threads on the elbow, and attempt to tighten again by hand.
To install, ensure the end of your 40mm pipe is cut square and free of jagged burrs or debris, which could compromise the internal rubber seal. Slide the compression nut and then the tapered washer over the pipe. Push the pipe fully into the elbow housing until it hits the internal stop, then screw the nut onto the threads by hand.
Avoid using abrasive tools to tighten the plastic nuts, as this may crack the fitting; hand-tightening followed by a quarter-turn with a wrench is typically sufficient. Periodically check the connection for moisture if you have moved the pipes recently, and clean the assembly using only standard non-caustic drain cleaners to preserve the integrity of the plastic and seals.
