Long time lurker here... need a hand with this one!
Bought a new (to me) house in April. Has the same Sand Dollar filter as my last house, but base pressure is a little higher (15 PSI instead of 9 PSI), so I figure the sand is a little older. Has been fine up to today. When the PSI reaches 25 or so, I backwash back down to the base level. No problem.
HOWEVER, today I notice that the filter pressure is holding at 5 PSI (10 less than normal). Skimmer basket is clean. Pump basket is also clean. Impeller turns and is clean, as far as I can tell (used fingers and a screwdriver to check for debris). Suction beneath the skimmer basket and return pressure out of the eyeballs are both STRONG. I also detached the inflow pipe on the top of the filter to have a quick look at the inside of the valve, and it's clean in there. Detached the outflow pipe from the pump for a quick look inside. Clean there, too. Pool water is clear. Tried backwashing and rinsing the filter (3min / 30sec) which made no difference... still 5PSI. Drops to 0 when turn the pump off. Gauge is new as of April. Pump seems to prime as normal. I don't see any water leaks around the filter.
The only thing that I can think of is that a dog got into the pool two nights ago and there was some matted hair floating on the surface. We removed most of it from the surface with a sweep. I would think that dog hair in the filter would INCREASE pressure, and that it would resolve when the filter is backwashed?
Any help is very much appreciated!
Bought a new (to me) house in April. Has the same Sand Dollar filter as my last house, but base pressure is a little higher (15 PSI instead of 9 PSI), so I figure the sand is a little older. Has been fine up to today. When the PSI reaches 25 or so, I backwash back down to the base level. No problem.
HOWEVER, today I notice that the filter pressure is holding at 5 PSI (10 less than normal). Skimmer basket is clean. Pump basket is also clean. Impeller turns and is clean, as far as I can tell (used fingers and a screwdriver to check for debris). Suction beneath the skimmer basket and return pressure out of the eyeballs are both STRONG. I also detached the inflow pipe on the top of the filter to have a quick look at the inside of the valve, and it's clean in there. Detached the outflow pipe from the pump for a quick look inside. Clean there, too. Pool water is clear. Tried backwashing and rinsing the filter (3min / 30sec) which made no difference... still 5PSI. Drops to 0 when turn the pump off. Gauge is new as of April. Pump seems to prime as normal. I don't see any water leaks around the filter.
The only thing that I can think of is that a dog got into the pool two nights ago and there was some matted hair floating on the surface. We removed most of it from the surface with a sweep. I would think that dog hair in the filter would INCREASE pressure, and that it would resolve when the filter is backwashed?
Any help is very much appreciated!