It's called a cushion. They are expensive for what they are. I've had the aftermarket ones that come with the cheap pumps and they turn to goo.
I just used hose clamps to secure my pump the last time and ran without the cushion.
I think it prevents noise if the pump contacts the bottom of the tank. Just my guess.
I just used hose clamps to secure my pump the last time and ran without the cushion.
I think it prevents noise if the pump contacts the bottom of the tank. Just my guess.