Mcalpine: Self Sealing Trap

Mcalpine - Self-Closing Waste Valve

Self closing waste valves have no water seal and can never dry out through evaporation or lack of use they must not be used on baths or shower trays unless there is access for maintenance. The MacValve membrane opens under water pressure to allow discharge to flow freely and then close to form a seal to prevent foul odour or sewer gas entering the building and can be fitted n a horizontal or vertical position. The MacValve can be used to take the discharge from a pressure relief valve on an unvented domestic hot water system. Please refer to guidance notes in approved document G3 of the building regulations.

• Multifit compession outlet suits all plastic, copper and lead pipes
• Manufactured in polypropylene
• Conforms to BS EN 274-1:2002
• Available in 1¼" and 1½" sizes
•  BSP female inlet nut x universal compression outlet
•  Membrane opens under water pressure to allow discharge to flow freely and then closes to form a seal to prevent foul odour or sewer gas entering the building
•  Can be fitted in horizontal or vertical position
•  Can be fitted in installation where a non-return valve can be of benefit to the plumbing installation
•  No water seal so it can never dry out through evaporation or lack of use of an appliance as the membrane remains sealed
•  Not recommended for use with shower trays unless there is access for maintenance
•  Patent Pending