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The McAlpine ST90-HP2B is a trap body designed for plumbers and DIY enthusiasts needing to prevent sewer gases and odors from entering a building through a 1.5" waste pipe. Its key benefit is the 50mm water seal, which ensures an effective barrier against unpleasant smells. A potential caveat is its specific 1.5" connection size, requiring compatibility with existing pipework. This trap body features a 50mm water seal, a 135° bend, a BSP coupling nut, and a multifit outlet for 1.5" waste pipes, offering reliable odor prevention and straightforward integration into various plumbing setups.
| Model Part Number | ST90-HP2B |
|---|---|
| Brand | McAlpine |
The 50mm water seal creates a layer of water within the trap that acts as a barrier, preventing unpleasant odors and harmful gases from the drainage system from entering your living space.
No, the McAlpine ST90-HP2B is specifically designed for 1.5" (40mm) waste pipe connections. Its multifit outlet accommodates various 1.5" pipe types.
Run water through the connected appliance (sink, basin, etc.) at least once a week. This replenishes the water seal and prevents evaporation, which is common in infrequently used drains.
The trap body has a tested flow rate of 42 liters per minute when tested under a constant 15mm head of water, as per BS EN 274-2:2002.
The height of the McAlpine ST90-HP2B trap body is 85mm.
The product includes the trap body, a 135° bend, and a BSP coupling nut. However, it does not include trap tops or extension pieces, which may need to be purchased separately depending on your plumbing configuration.
It's recommended to check for debris and clean the exterior as needed. Ensure the water seal is maintained by running water regularly. Deep cleaning or descaling might be necessary if slow drainage becomes an issue over time.
Check that the water seal has not evaporated (run water through the connected appliance). Ensure the trap body is correctly installed and sealed. Verify no cracks or damage to the trap body or connections.
Inspect the trap body and connected waste pipe for blockages. Clean out any debris. Ensure the water seal is not excessively deep, impeding flow.
Ensure all connections, especially the BSP coupling nut, are tightened appropriately. Check seals and gaskets for damage or wear. Re-seat and tighten connections.
Confirm the waste pipe is indeed 1.5" (40mm) in diameter. Ensure the pipe end is clean and correctly prepared for the multifit outlet. If using a non-standard pipe material, ensure compatibility.
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