Hi. I have noticed that when our pool comes on in the morning (after not being on) we have very little suction. This also happens a couple of hours past my work around (see below) and the pump begins to cavitate. I have also installed a Pentair Sand shark robot and it too slows with the apparent lack of suction.
My work around has been flipping the pump off and rotating the valve to backwash, letting it run a little then putting the system back on auto and changing the valve back to its normal position. when the Pentair system turns on, Voila, suction! What is happening here? Can it be associated with Q2?
Q2., I recently fired our pool guy who was an imbecile. I believe that our Hayward 6020 has never been cleaned nor ever had any DE replaced. I know that he was back washing at times, but he never added any DE. Since I have crawled all over this system (see Q1) I can only believe that this 6020 is in need of some serious TLC. I want to open it up tomorrow and clean/inspect it. Is there anything other than the general instructions I should do to this 2 year old never maintained system other than washing and adding DE?