Broken air release valve/sediment release valve on intex filtration system

[BigDave]

Lift the pump up higher than the pool's water line - maybe set it on a step ladder.

[Watermom]

A pool store should have a rubber stopper that will work. We have bought one before. It had a wingnut on it that you tighten. Or you could just jam a plastic bag in the skimmer but make sure you remove it before you turn the pump back on! You can take the eyeball of your return, wrap a piece of thin plastic around it and then put it back in and that should also prevent return flow backwards. (The plastic idea was from Poconos, another one of the moderators who hasn't been active on the forum recently.)