I have two return outlets in my pool. One is leaking, it has been patched before. My question is , Can I plug the return off and just have the other to circulate the water. It is an old pool with old pvc lines. Pool company has been here twice and it still leaks. A pressure test showed no leaks. The problem is between the pipe and outlet. I'd like opinions on whether you think the pressure may be too high and cause more problems? Suggestions are appreciated