- ✔ Suction – Controls Water From Pool/Spa
- ✔ Pressure – Controls Water Back to Pool/Spa
- ✔ Check – Keeps Water Where it is Supposed to Be
- ✔ Backwash – DE Filters
- ✔ Air Relief – Filter Gauge Assembly
Suction:
If the suction valves in front of or before the pump are leaking or damaged, they may not let the pump run correctly because they could be allowing air into the system when on, and after the system is off. We have seen pumps fail from not being able to move water correctly and were able to track the issue back to bad o-rings on some of the suction valves.
Pressure:
An issue with a return valve will most likely show up as a leak when the system is running. At times the water leak may be small. However, when the system shuts off it could allow air to enter the system. This results in the pool filter pump losing its prime and not running correctly.
Check:
These valves are EXTREMELY important when the system shuts off after normal operation. They are designed to keep the water where it is supposed to be. This factor is very important when the pool equipment is higher than the pool. On systems where the spa is higher than the pool, they will also help keep the water level in the spa full.
Backwash:
Usually associated with DE pool filters and sand pool filters. If they are not working correctly, they could allow debris back into the pool or could be leaking water when running.
Air Relief:
These valves are normally on the top of the filter and are used to bleed off air that has gotten into the system. When the system is running and the air relief valve is opened, the air is released until water starts coming out of the release port. At this time, the valve is closed and you can get an accurate filter pressure reading.
If the air relief valve is bad, it acts like a bad pressure side valve.
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