We bought a new (to us) house in October and now I am finally able to get around to getting the pool functioning. The frogs we getting ready to take over. Here are the details about the pool:
Pentair IntelliFlo 3HP variable speed pump (I replaced the old one since it was 20 years old and all the seals were leaking)
Polaris 3/4HP booster pump for Polaris 280 cleaner (both of these are also brand new)
Nautilus NS DE filter (I cant tell what size it is but I think its around 50 sq ft)
There is also a spa that spills into the pool but there is not heater and looks to never have had one installed
If I take the filter out and rinse it off I will only get 2-3 hours out of it before I start to not get anything back through the return lines. If I look into the pump basket the water will not be to the top as if it's not drawing enough water. If I backwash the filter I will get another hour or so out of it before the same thing happens again.
Just to try it out I ran the pump without any DE after I cleaned it and it seemed to run longer, maybe 4 or 5 hours, before this happened.
So is this a filter problem or is it a suction problem? Or something else?