Split from the DE Filter Cleaning Tutorial to keep the Sticky clean. jblizzle.
something about this I'd like to clarify:
On my pool at least, there's a pretty big difference in pressure depending on which valves are open from the pool into the pump.
When I'm charging the filter with DE, I have been setting the skimmer full open, all others closed. When I've finished charging and before moving the valves, I am at about 10 psi. When I open the spa and main drains halfway for normal operation, it goes up to 18 psi. This 18 is what I'm considering as the "starting pressure".
When I backwash, I open all of them all the way. Seems the max flow I can get is what I'm after in this case.
Am I doing it right?