It is necessary that the will be used in the water system to permit the technique to be forbidden in an efficient and safe manner. The number, size and the types of valves required may rely on the complexity and the size of the system. There are lots of valves that can be acquired in types and sizes to counterpart the sizes of the pipes used in the water system installations.
1. Shutoff Valves – the shutoff valves must be installed in between the pressure and the pump tank and between a pressure tank and the service entry to the building. The globe, ball and the gate valves are the usual shutoff valves. The ball and the gate valves cause lesser friction loss when compared to the globe valves; the ball valves last even longer and leak lesser than the gate valves. The shutoff valves permit the servicing of the parts of a system without the need to drain the whole system.
2. Relief Valves – these relief valves allows the air or the water to escape from a system to relieve the excess pressure. These are spring-controlled that are normally adjustable to alleviate the changeable pressures, usually more than 60 psi. The relief valves must be installed in the systems that will develop pressures beyond the rated restrictions of the distribution system or the pressure tank. Positive displacement, submersible pumps and the water heaters may develop those excessive pressures. These relief valves must be installed in between the first shutoff valves and the pump and should be able of setting free the flow rate in a pump. The temperature relief valve and combined pressure are desired on all the water heaters. The vacuum relief valves and also the combined pressure must be installed to shun from vacuum damage in the system.
3. Altitude Valves – usually, the altitude valve is being placed in the base of the hot water tank so it can prevent from overflowing. The altitude valves sense a tank level by the pressure line to a tank. The adjustable spring permits setting the level and so that a valve close and shuns more inflow when a tank became full.
4. Check Valves – the check valves have that function that is the same with the foot valves. They allowed water flow in a direction by a pipe only. The submersible pump can use some of the check valves. The other one is situated at the peak of the pump so it can shun from backflow from sourcing the back spin of impellers. Some methods use one more check valve and the snifter valve. This will be in the pitless unit or the drop pipe in the well case and permit the weep hole situated in between the 2 calves to drain the parts of the pipe. If a pump is starting, it can oblige the air from its drained part of the pipe to a pressure tank, therefore, recharging a pressure tank.
5. Pressure-reducing valves – the pressure-reducing valves are used to decrease the line pressure. On the main lines, this permits the application of the thinner walled pipes and protects the house plumbing. At times these valves are being installed on solo services to protect the plumbing.