As part of our pool/backyard renovation, I am going to relocate the pump and filter, and add a SWG and solar heating. Reason being the area where the pump currently resides will be excavated when the yard is redesigned, plus it is further from the house and next to the proposed pool house.
The relocation point will be closer to the skimmer and one of the returns, but further from the other one. It appears the pool is currently plumbed in 2" (50mm) from the skimmer to the pump, then 1 1/2" (40mm) through the filter and back to the returns. I plan to keep the same set up, but will be adding a second suction point, controlled by a valve to run an automatic cleaner and also act as a suction relief point for the skimmer. I figure I can dig down the back of the concrete where the jets/skimmer is and expose the old pipe, then cut and join in the new lines. Obviously the new suction will need to be core drillled through the concrete, then epoxied and sealed.
The main difference will be that the pump/filter will now be about 18" (450mm) lower than the pool, whereas it is currently about 12" (300mm) higher. Is there anything I need to do differently or be aware of? I was planning to run all the plumbing from the pool up to just under the paving level, then to the pump to create a trap effect. Is this necessary?
For the second suction, if I am planning to attach an automated cleaner, what sort of fitting/connection does it need to be?
The pool is around 11,000gal (42,000L) and runs a Hayward Super II 1.5hp pump.
Any suggestions or experience welcome!