Vacumming Sand?

[Mr.Mooks]

Yes it is a Hayward. I am not sure of the volume of my pool. It is an 15x26 oval and 52" tall. It's just a little sand. I don't think it would even be a pound if all put together. After I vaccume should I backwash? I have not had any pressure increase since the install so I have still never backwashed the filter yet. I was told only to backwash when your pressure increases? Is that right? Thanks for all the help. I just never expected to see sand on the bottom.

[SalemCastles]

Hayward says to back flush a new installed sand filter BEFORE putting into service on filter. This is to remove any small sand particles that the filter can't catch in the internal screens called laterals. As your filter gets dirty it will actually get more effective and might hold the sand but in any case I don't think you have anything to worry about in terms of pump or filter damage in vacuuming it up. If you keep getting more sand in the pool after a period then I'd be looking for a broken lateral in the filter. Make sure you watch your warranty period. Only backwash when the pressure gets to 8-10psi over it's clean pressure otherwise your wasting water and chemicals.

[Watermom]

Actually, some AG pool filters need to be backwashed when the pressure rise is less than 8psi. Some at more like 5psi. You can tell when you have reduced flow at the return.