My pool is an overflow type and the vacuum port is about 4 inch below the water line. Recently I noticed a loss of suction, I have checked all the seals and they seam OK. The pressure was at 1 bar, I did a backwash and now it is at .5 bar. The suction is still low. Originally I would have difficulty removing the hose when the motor was running, now no problem.
Any suggestions please.
Thanks in advance