Rainbow 1.5" or 2" Non Return Valve - (2 lb spring)
Rainbow Non-Return Valve
Prevents back flow of water in pipelines.
Can be installed using 1.5" pipe or 2" socket.
Best to install with a socket union either side, so you can clean & maintain.
Advised to install alongside any chemical dosing equipment to avoid chemical back flow into delicate elements such as heaters.
If using with salt water then we recommend flushing with fresh water every 6 months.