- Mar 24, 2013
- 8
I have a 16 x 32 Doughboy dug down to ground level ( top of pool is level with ground) . My equipment is about 4' above pool level . The problem I'm having is when the sand filter is in " filter " position , I lose a tremendous amount of suction . I have replaced the pump with a 1 hp inground pump but , I have the original tan Doughboy sand filter , maybe 20 years old ? When the valve is in : recirculate" position , it works fine , it's when I turn it to filter position when I have the problem. Should I replace the sand filter ? Is there above ground and in ground sand filters ? I replaced the sand last year and I backwashed it yesterday until the water was clear