Guy's got a pretty dumb question I guess. I would like to take a poll on how everyone is backwashing there FNS filters? Pentair's recomendation is pretty much like the one in POOL SCHOOL:
Turn off filter
Turn selector to Backwash
Open air vent
When tank is empty turn filter on
Watch sight window until clear
turn off filter
Select rinse on selector
turn filter on
watch sight window until clear
turn off filter
turn selector to filter and add DE
repeat steps 6-10 if needed
My question is you can never drain an FNS filter due to the loction of the outlet (12 inches above the bottom) and when I open my filter to clean it most of the DE buildup is at the bottom. Also I never use the RINSE function because I never felt like it really did anything? I just go from filter to backwash to filter until no more sediment can be seen through the sightglass(usually 3 times). Then I would go ahead and add DE. And also the recomendation for 12 (1lb)coffee cans I thought was excessive for a backwash replentish, so I've been adding 7-9. Maybe 12 for a brand new start-up but I've found that after opening up the filter for cleaning there was like18-20 deep of stuck DE at the bottom of the filter that wasn't getting washed out! So I just backed off on my DE reloads. If the RINSE is not needed what is it for?
Turn off filter
Turn selector to Backwash
Open air vent
When tank is empty turn filter on
Watch sight window until clear
turn off filter
Select rinse on selector
turn filter on
watch sight window until clear
turn off filter
turn selector to filter and add DE
repeat steps 6-10 if needed
My question is you can never drain an FNS filter due to the loction of the outlet (12 inches above the bottom) and when I open my filter to clean it most of the DE buildup is at the bottom. Also I never use the RINSE function because I never felt like it really did anything? I just go from filter to backwash to filter until no more sediment can be seen through the sightglass(usually 3 times). Then I would go ahead and add DE. And also the recomendation for 12 (1lb)coffee cans I thought was excessive for a backwash replentish, so I've been adding 7-9. Maybe 12 for a brand new start-up but I've found that after opening up the filter for cleaning there was like18-20 deep of stuck DE at the bottom of the filter that wasn't getting washed out! So I just backed off on my DE reloads. If the RINSE is not needed what is it for?