I need to lower the water level in my in-ground pool just a bit (it's just high enough that cold water from the pool spills over into the attached spa when I'm trying to heat the spa). I understand there is a way I can do this using my pool filter pump. I've got an IntelliFlo Variable Speed pump (new) and a Pentair Clean and Clear Plus Cartridge filter (also new). The manual for the filter seems to indicate if I loosen the air release valve atop the filter and turn the pump on, water will run out of the filter. But I"m not clear where exactly the water comes out, and is there any way I can attach a hose to it, to direct the water flow.

Of course, I am going to fiddle around and try things for myself, but before I do I thought it would be good to ask for some advice on this. Thanks in advance for any help you can provide.

-- John