The McAlpine 1 1/4 inch Resealing Bottle Trap is an alternative to an anti-syphon trap (otherwise known as silent trap) and may be used in similar circumstances.
- 1 1/4" connection
- 75mm Water Seal
- Fits all 1 1/4 inch plastic pipe to BS EN 1451-1-2000 and BS EN 1329-1:2000, metric or imperial copper pipe or lead pipe
- Incorporates Multifit connection ensuring a secure seal is made between the pipe and fitting wall using the internal multifit and friction washers
- Manufacturers Code - McAlpine A10R
Operation of a resealing bottle trap
When the trap is subject to syphonic conditions the automatic hydraulic action allows air to be drawn through the inlet of the trap and through the bypass columns thus breaking the syphonic action. The difference between an anit-syphonic trap and resealing trap is that the air is drawn through the inlet of the trap and not through the non-return valve. This gives the advantage of simplicity with no mechanical action ensuring retention of adequate water seal even under extreme syphonic conditions. The need for secondary ventilation is also eliminated.