Pool Building and Repair
Pool Care and Cleaning

You have only about half pressure on your pool pump?


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Answered 2009-12-16 11:17:59

Usually the pressure gauge on your pool equipment indicates how much pressure there is before the filter. as the pressure goes up it indicates that the filter is getting blocked and needs a backwash or cleaning. while the pressure is low the filter does not need cleaning.


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pump was ok until I cleaned mess in pool. after that lost pressure. Changed sand but no luck

When the pressure on your pump goes up

The only thing that needs to be done before removing the lid from the pool filter is to stop the pump. once the pump is idle there is no presure to speak of.

In most cases a booster pump is used to provide additional water pressure to an automatic pool cleaner , sometimes they are used to provide additional water flow and pressure to a connected spa. A low pressure pump may also be used to pump water through a solar heater.

The pressure increasing indicates that something is blocking the filter.

The one way you colud tell if the pool pump is not working propley is by checking if the pool is getting air inside or idf theres a hole in the pool or in the pool pump. If your pressure on your filter is low then check to see if your basket has crack and letting debris get past. This will clog the impeller and slow down the water flow. If you have good return in the pool then you are getting a good return through your pump. If you can see that the pump basket area (trap) is full of water or in this case full prime than you are OK. If you have half or 1/4 full in this area then the impeller or you have air coming into the pump. If your pressure gauge is high try to backwash or clean your filter and see if this didn't help the flow.

A pool pump motor which is drawing half the amps listed on its nameplate can indicate a problem with the windings or a lack of incoming current. Pumps will only draw as many amps as are required to operate under the current load.

A pool pump should only be replaced if and when it fails. A pool pump needs proper maintanance in order to function properly,and should last the life of the pool ith proper care.

A pool with a sand filter or for that mater any filter is set up to push water through the fitter to be filtered. when the filter is clean the gauge in front of the filter Will have a low pressure reading. As the filter gets loaded with more of the dust and dirt that comes from the pools water it becomes harder for the water to pass through the filter and the pressure on the gauge goes up when the pressure get high on the gauge it is time to backwash the sand filter or to clean the cartridge filter. When the pressure on the gauge is high the suction from the pool is low. When the suction from the pool is low even when the pressure on the gauge is low there may be a problem with the pump, or a blockage between the pump and the pool, To increase the amount of pressure on a clean filter the only thing that can be done is to enlarge the pump.

Not necessarily, it depends on the condition of the original pump. It may have a worn or warped impeller. I would look into making sure the original pump is in good shape.

You will need to backwash the pump, and then rinse out the filter.

Strainer basket id full or blocked

When the pressure on the filter pump is above 20 psi.

Normaly pool pumps have only one speed " flat out" unless you have a two speed pump.

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No. generally a booster pump is used to run a pressure side cleaner.

Main reason for pump seal (mechanical seals) in a pool pump any pump for that matter is to contain liquid (water in this case) in the pump and hold prime and pressure. Other reasons, lower friction,reliability it can last for years.

You need to backwash only when your pump pressure is 15 or 20 psi above the normal pressure rate.To backwashTurn OFF the pool pump.Turn pool control handle to "backwash"Turn ON the pool pump. Watch for the dirty water to flow until it becomes clear. (Most filters have a clear bubble on the side that allows you to see the water as it flows out of the system)Turn OFF the pool pump.turn the handle to rinsestart the pump again for about 10 seconds or until the water in the bubble is clear.Turn the pump of again.Return the filter handle back to the filter position.Start the pump up againcheck that the pressure in the gauge has dropped considerably and if it has you once again have a clean filter until the pressure builds up again.Note : When you backwash a filter, you drain allot of water from your pool.According to my directions: Let water turn dirty and then clear up and no longer than 3 minutes. And after every vacuuming.

Backwash the filter when the pressure increases 10 psi above the pressure when it was clean

A clogged filter? The pressure AT THE GAUGE will drop after the pool is backwashed and also during vacumning. As the filter becomes clogged the pressure AT THE GAUGE will increase. The opposite effect occurs at the inlet eyeball.

When vacuuming a pool manually a loss of pressure can be caused by something getting stuck in the hose. A leaf or a large bug can get stuck in the hose and cause it to lose pressure.

It is a great pump. It isn't only quiet but it also produces the highest water flow offered by any pump.

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