SOURCE: Sand Dollar Filter
If sand is returning to the pool, the most common cause is the laterals, or the internal pipe is not connected to the valve properly.
If you have laterals with "slots" on one side and solid plastic on the other side, the slots have to be installed so that the slots face downward, toward the bottom of tank. If one, or more, are facing upwards, you are pulling sand right into the pool. If you have the newer laterals, with slots on all four sides, one, or more, may not be tightly in place.
If you have too much sand in the filter, that could cause this issue also. Pentair recommends using the #20 Standard Silica Sand in the filters.
Hope this helps!
SOURCE: sand dollar sand filter has great pressure on
Generally, if the filter loses pressure in the filter mode, you have an air leak somewhere. When the filter is low on pressure, check your pump basket area. If there is air in the basket, that is the problem. It could be a bad o-ring under the basket lid, or the air release on the valve, but it will need to be found. Check for drips around the equipment also.
SOURCE: my pool sand filter pump isnt filtering the water
sounds like the sand has clumped together inside filter. you can open filter and replace sand charge or dump into wheel barrow loosen sand and flush clean with hose and put back in
SOURCE: How do I drain the filtration tank for winter?
There should be a drain at the bottom of your filter. There are really two drains in one ... one part lets the water out the second part (same hole) lets the sand out. Becareful not to remove the sand strainer.
Use a shop vac to blow and/or **** the lines out. Might be wise to lower the water below the suction and discharge lines (bottom drain excluded)
dont forget to pull the two (probably) on your pumps, one in the basket and one in the pump chamber.
alternatively, visit your manufacturer web site for specific instructions.
I dont think you will go too far wrong following my comment but Im not coming to fix any freeze damage :-)
You can try some sort
of epoxy to seal the crack, but I myself haven't had much luck patching these pool filters. It is worth a shot if you want to save money, but don't expect great results. If you do attempt it, try a quick drying, waterproof epoxy sealant.
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