So have an odd one again, need a float for a cattle waterer. Originals were a 7” square block of styrofoam about 4” thick. I’ve thought about making one out of 2 pieces of 2” styrofoam, however being a moist environment I wondered about water or crud collecting between the layers. Also the originals had a thin plastic coating on em, not sure if styrofoam can become waterlogged or if it was to help it slide a little in case the float rubbed the side of the housing it’s in.
Tried round floats first for like a toilet, no dice, even rigged four up together, no good, Tried square floats, those work a little better since they have more surface in contact with the water immediately, still not good as a single doesn’t create enough lift to shut the brass valve, two side be side get a little cocked then wedge in the housing.
Have tried all the online stores, so far zilch. The original manufacturer of these waterer was local but went out of business decades ago. Guessing they are 40 years old now, metal tank but porcelain coated.