The McAlpine Self-Closing Basin Waste Valve MACVALVE-1 provides a highly effective waterless sealing solution for domestic plumbing installations. Specifically, it features a unique membrane that opens under water pressure to allow discharge to flow freely and then closes to form a seal to prevent foul odour or sewer gas from entering the building.
Therefore, the McAlpine MACVALVE-1 suits installations where a non-return valve is beneficial, particularly where a standard water seal might dry out through evaporation or lack of use. Additionally, it can be fitted in either a horizontal or vertical position and features a 1¼” BSP female inlet nut with a 1¼” universal compression outlet, which simplifies installation and ensures a secure joint.
The MACVALVE-1 forms part of McAlpine’s trusted range of self-closing waste valves. As a result, it delivers dependable operation across a wide variety of domestic plumbing applications—including taking discharge from an unvented hot water storage system pressure relief valve—and fits 1¼” waste systems specifically.
Odour & Gas Prevention: The internal membrane closes completely when not in use. Consequently, it provides a convenient and effective plumbing solution to stop foul odours or sewer gases from entering the property.
Dry-Out Resistance: Functions without a traditional water seal, meaning the membrane remains sealed and can never dry out through evaporation or lack of appliance use.
Problem-Solving Design: Overcomes issues associated with unvented domestic hot water storage systems, safely handling discharge from pressure relief valves in accordance with Building Regulations Approved Document G3 guidance.
Trusted McAlpine Quality: McAlpine manufactures this component, ensuring dependable performance and high manufacturing standards.
Technical Specifications:
Product Type: Self-Closing Waste Valve
Model: MACVALVE-1
Application: Preventing foul odours and sewer gases in plumbing installations
Outlet Connection: 1¼” Universal Compression
Manufacturer: McAlpine
