Hello and thank you in advance for help and suggestions.

I have a 20 year old in-ground concrete pool 16x32 about 23 thousand gallons, Hayward 1.5hp pump, Hayward, S244T sand filter, Hayward CL220 Chlorinator.

I had a poor suction problem and troubleshot the problem to old worn pump seals. Because the unit was so old and the parts were unavailable I decided to change the pump and filter with the same sand filter combo but all Hayward.

After the upgrade I regained the steady 22lbs of pressure, solid flow through the pump with no air bubbles I once had, but I still have poor suction. My Barracuda pool robot can't work because of the poor suction. I also noticed that the water return jets inside the pool are very week too. When I backwash or rinse the suction increases and appears perfect as the barracuda races around the pool.

Any suggestions would absolutely be a God send I this problem has me at my witts end, Thx...