Closing pool with a cartridge Filterl

[Bob H]

I have a cartridge filter (hayward 325Sqft) and am wondering if I take the cartridge assembly out of the body and reassemble can I safely blow out my return lines going through the filter. I would be using a 2.5 hp shop vac. (oops, I need to update equip. profile... no more sand filter and no more clorinator)
Thanks everyone
Bob

 

[JasonLion]

For blowing out the lines, as long as the body is fully assembled it doesn't matter if the cartridges are inside or not.