If the suction side connection is loose this will cause the pump to suck air when attempting to prime and either significantly impair it from fully priming or prevent it from priming at all.

You may notice a substantial decrease in your pool line pressure overnight, from 15 to as little as just 5-7 psi, a low water flow rate and that your pool cleaner has almost stopped working. The most common explanation for this is suction problems, meaning that something has caused a blockage on the suction side of the pump. An air leak is caused by a problem on the intake side of the pump. ... All air leaks have their origin somewhere before the pump on the suction side of the system. In other words, the pool pump has suction (negative pressure) on the intake side of the pump and pressure on the outlet side of the pump. Everything is just on 7 months old - pool, pump, filter and everthing worked fine till about a week ago. The pump pot lid should have a good o-ring. Actually, you're both right! The suction on my hose is comparable to a shop vac or less. After backwashing or cleaning the filter (and pump basket), you have what is known as the clean, or start-up pressure on the gauge. If you have an air leak, you will notice air bubbles in the pump pot as well as air coming out the returns into the pool water. Hi, I have replaced the sand in my pool filter with a sponge medium. As a result the pool vacuum cleaner is running terribly slow. In my pool, I have occasionally neglected to check this filter and it has become clogged. I have started having endless problems with my pool pump. Pump Troubleshooting Water Pump Problems: Low suction or flow rate. Swimming Pool Pump Turns On but Does Not Circulate Water ... Fortunately, there are only a handful of problems that can cause this, including a clogged filter, a low water level or a pool line blockage. When I run the pump on filter it has low suction, but if I "block" the hose on the cleaner with my hand the suction builds up and is very strong, but as soon as I let go it gets weak very quickly. The pressure gauge on the filter tank tells you if the flow rate is normal. Cavitation in your pump pot is an indication of low pressure. The easiest thing to do to fix this problem is to lift the skimmer lid, take the filter out, clean it, and then replace it. The easiest thing to do to fix this problem is to lift the skimmer lid, take the filter out, clean it, and then replace it. (2018, December 27). Setting up the vacuum is a simple matter of attaching suction hoses into the pool's pump system and turning the pool pump on. It is the symptom of a problem – one that could be a minor or major fix. Your water pump is primed and the liquid is flowing… kind of. As a result the pool vacuum cleaner is running terribly slow. A pool vacuum is a relatively simple device in which the swimming pool's pump system is used to draw water through the head of a portable vacuum appliance that scrubs along the bottom and sides of the pool. One of the more common problems with water pumps is a reduced or lower than expected water flow.