Can't handle the water pressure in my house even though we have a pressure regulator. The gasket appears to be hard white plastic, not rubber. I was only able to return one of these as I had previously painted the float black so the silver plastic wouldn't be as noticeable. I did that before I tried it. One reviewer said they needed to buy a larger float, which is odd. I bought a better valve to use with a painted float. This worked too well so I filled it 1/3 full with water to keep it below water level in the small pond at the bottom of my waterfall.
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