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The Thomas Dudley Sink Waste Washer is an essential plumbing component designed for homeowners and professional installers looking to establish a reliable, leak-free seal in kitchen and bathroom waste systems. It provides a durable interface for 1 1/2 inch BSP connections, ensuring long-term water containment; however, users must account for the 1 3/4 inch external diameter measurement inherent to BSP threading standards to ensure it matches their specific sink waste assembly.
| Model Part Number | PWATRA370292 |
|---|---|
| Brand | Thomas Dudley |
No, this washer is specifically sized for 1 1/2 inch BSP threaded connections.
This is due to BSP (British Standard Pipe) threading standards, where the sizing refers to the internal bore rather than the outer thread diameter.
Yes, provided the bathroom waste connection is a standard 1 1/2 inch BSP fitting.
In most cases, the design of the washer provides a sufficient seal on its own; however, if the sink surface is uneven, a small amount of plumbers' putty may be used.
The washer has a thickness of 1.5mm.
Check that the washer is seated squarely and that the backnut is tightened evenly.
Verify your waste system is indeed a 1 1/2 inch BSP size; the actual measurement of the washer should be 1 3/4 inches to fit the thread diameter.
To install, ensure the sink surface is clean and free of debris or old adhesive residue. Place the washer onto the waste thread and tighten the backnut by hand until snug. Avoid overtightening with heavy-duty tools, as this can crack plastic waste components. For maintenance, check the seal periodically during routine plumbing inspections. If a leak develops, inspect the washer for cracks or excessive flattening; replace if necessary to maintain a watertight integrity.
