My spa just started draining into the pool, so I am assuming I have a bad check valve. Attached is a picture of the valve and it looks like there is no room either on top of or beneath the valve to cut it out and put in a new one (will replace with Jandy). My real concern is on the bottom as there is no room at all between the check valve and the spa/pool valve. I sure don't want to have to replace the spa/pool valve. Any suggestions?