Probably STUPID idea but I needed to change the filter. I've had 4 Intex pools that had close valves when changing the filter...this stupid pool doesn't! i figured I can get this switched out and tightened back up...BAD DECISION. Now my filter intake is leaking and I'm fit to be tied...need help! PLEASE!!! Am I supposed to put the black plug into the water intakes inside the pool??? Seriously, this is ridiculous and too much work. The only shutoff valve is where the water is put back out from filtration. Hopefully I make sense! Single mom!