Non Return Isolating Ball Valves
Non Return Isolating Ball Valves by AVG
The NRI's from AVG is the perfect twin function valve widely used when installing appliances. The non-return & isolating valve provides two important functions;
- It is an isolating valve isolating the incoming mains water from the appliance, a typical usage would be the installation of a hot water tank allowing easy service of the hot water heater without isolating the properties water supply completely.
- It is a non-return valve prevents water returning back up the supply line.