Went and turned on the filter a little bit ago and as I was walking away, I heard air and then water started spewing out of the filter where the clamp is. Called my husband and he said probably the oring and there is no telling when the owners of the house last changed it. I watched a video on how to change it. In the video it said to drain the water in the filter. I know to cut off the water coming into the pump(obvious cut off switch at the pump) but does water come in from the plumbing that goes back to the pool? Can water come back through the jets or no? May be a dumb question but i honestly don't know much about this stuff.