I have 2 returns in an inground pool (18X36). The return that is furthest away from the pool equipment (approximately 40ft) seems to flow properly during normal use. It flows out hard and pushes my hand away as it always has. The return closer to the equipment (15ft) barely trickles out. I am not losing any water so there are no leaks. If I plug up the return furthest away, the one that is not working will work as it normally should. The return line is some sort of flexible PVC. My pool service seems to think that the line is crushed. I'm not sure that if the line is crushed that it could have the flow that it does when the other end is plugged. Could there be other reasons why this might be happening?