Andrews Pipe Pump Return To Isolation Valve 28mm 7709338

The Andrews 7709338 is a 28mm pipe assembly that connects the pump return to the isolation valve on twin heat exchanger water heaters. It forms part of the Andrews water heater spares range and is used across the Maxxflo EVO appliance family. Its role is to carry return water between the pump and the isolation valve, allowing the heat exchanger circuit to be isolated for service.

• Weeping or visible leaks at the pipe joints or connections
• Corrosion, pitting or heavy scale build-up on the pipework
• The isolation valve no longer shuts off flow through the pipe
• Physical damage, distortion or cracking of the pipe assembly
• Water tracking along the pipework during operation

• Confirm your appliance model against the fits list above
• Check the pipework diameter required is 28mm
• Verify the appliance has a twin heat exchanger configuration
• Inspect the isolation valve and adjacent connections for condition