First off, thank you for reading my post.
I have recently bought a house and with it, my first pool. I have had only problems! Let me tell you what I have done and then my problem :
* Changed the couplings going into the pump and out of the pump
* Changed the lid and O-Ring on the pump weir
* Dug-up my suction side pump and completely replaced that
* Replaced my filter sand
* Replaced my pool cleaner pipes
* Put thread tape on each and every coupling
Now my problem ... when the pool cleaner is not connected, the pump runs like a dream with no air bubbles, water is sucked in and pumped into the pool for hours on end with absolutely no hassles.
As soon as I connect the pool cleaner, the pump weir basket level drops a few centimetres and then after a while, the "whirlpool" in the pump weir basket disappears and the water stream pumping back into the pool becomes very weak. All the while, the pool cleaner is still running and (sort off) do its thing. I have the weir basket connected onto the pool cleaner pipes and this is clean. The pool cleaner stops as well after a while. When I switch off the pump and on again it runs like there is no tomorrow and then, after a while, everything stops as explained.