Service Valve Buying Guide
John, DIYer & IT developer, Brighton70 guides
- Stainless steel
- Dielectric connection
What is a Service Valve?
- A check valve prevents hot water from back flowing into to the cold water entry to prevent water pollution or legionella contamination;
- A quarter-turn stop valve shuts off the water supply;
- A relief valve, calibrated to 101.5 psi, opens in case of too much pressure in the tank. This occurs when the volume of water increases due to its expansion as it is heated or if the temperature in the tank too high;
- A control knob or thumb switch on the valve for drainage which should be used prior to draining the tank directly.
Service valve: configuration and materials
The cold water entry is located on the side at a 90 degree angle to the valve. This configuration corresponds to the majority of vertical heaters and some horizontal.
It is less expensive and easy to work with, making it perfect for a device as complex as a service valve.
The resistance of stainless steel to scale is a clear choice. Ask a professional about its care and maintenance.
What are the specifics?
Integrated dielectricWhen different types of metals are joined together in plumbing, they can develop a small electrical charge that can corrode them. Using dielectric unions prevents rust from forming on the water heater tank and are sometimes advised to be used at the cold water intake.
As it is already integrated into the service valve, you do not have to worry about it! If you follow other tips, you can find independent fittings that can be mounted on the hot water outlet.
Capacity of the tank
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John, DIYer & IT developer, Brighton 70 guides écrits
Lacking space, I have not got a permanent workshop and certain tools I dream about but are not part of my collection. Not to worry, I already know a lot about DIY and I have a high-tech profile that I hope will guide you in your decisions!