Why does my pool keep losing prime?
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Debris blocking the suction strainer or foot valve is the most common cause. A blockage in the intake line can cause the water in the pump casing to overheat and literally boil out of the casing causing the pump to lose prime.
What happens if pool pump loses prime?
If it does not loose prime when you close your skimmer and main drain valves, it would tend to lead to a suction side leak between the skimmer and valve or main drain and valve. You can isolate each as see which allows the pump to loose prime overnight.

Why is there no suction in my pool skimmer?
When your pool skimmer has no suction, the cause is most likely a blockage. This can put the entire filtration system of the pool into question, as there will be low water pressure.
How to fix a vacuum cleaner that has lost its suction?
Change the bag anyways when checking for why the vacuum has lost its suction- to be sure. Also, wipe down the canister to clean it up in case of dirt buildup. The hose collects the dust and debris from the surface and deposits it into the collection bag.

Why won’t my vacuum cleaner pick up anything?
The vacuum will continue to sound like it’s working, but won’t have any suction power to pick up the stuff on your floor. Most often, simply emptying the collection canister or changing the vacuum bag will solve a vacuum’s suction problems. If that doesn’t work, it’s time to check out the hose. Here’s how…
What causes a vacuum hose to lose suction?
Any crack, hole or kink will cause a vacuum to lose suction. If the hose is compromised in this way, it must be replaced. Conversely, turn an upright vacuum upside down to inspect the opening that leads up into the body of the vacuum.
Why does my central vacuum have low suction?
There are a few issues that can cause a central vacuum system to have low suction. You will want to first check the suction directly at the power unit to determine if the unit is the problem, or if there is a clog somewhere else.