Its my first post in the forum, first week learning about pools and have read most related posts here, so please excuse my ignorance
Pool:
100 squared meter, inground pool, with grout and tiles,
three suction tubes with a valve for each (main drain, skimmers (2joined), & side vacuum).
Problem:
The pump only fully primes (with almost no air bubbles in pump basket) when only the side vacuum valve is open, and both main drain and skimmer open) with bubbles and little pressure in return jets.
When skimmers are open too, more air appears in pump pre basket and more bubbles in return jets and alternating pressure from low, to lower. (also if i Put my hand over tube in skimmer, suction seems to stop completley before returning to low pressure a few seconds later, alternating between both states.
When main drain is open with side vacuum and with/without skimmers, the amount of bubbles is even more and the pump basket is empty, losing oprime completely.
I recently filled the pool after having the pool cleaned from immense algae and then the main drain area re-grouted.
Could this be a clog in maindrain &/or skimmer, Or should I empty pool fully and pressure test both drain and skimmers?
I hope it makes sense,
Kind regards
