I look after a lot of pools, but only this one is giving me problems. When I connect the vacumn hose and switch the valves, the pump loses prime as expected and normally (in other pools) it comes back in a few seconds and im ready to vacumn.
With this pool, however, it loses prime and just doesnt come back. The pump is receiving water but now the pump is only half full with water.
To get around this, I have to open the pump, fill with water, turn it on, open the pump, fill with water, turn it on and so on. I can be there 40 minutes doing this.
I have a feeling its the pump, I have taken the pump apart and checked the impeller, no damage or blockages.
There is, however, a small leak, (drip, drip, drip) from the pump shell (not on a join or anything) but this does not affect the pump when it runs from the skimmer and drain lines, either together or seperately.
Any advise would be greatly appreciated.