can any body recommend a hot water heater that dose not have a 20 min cut off I recently got one from cawoods which they used to advertised as not having a cut off.but after getting one it did as all their stock did after telling them they alterd their site.then refused to take it back.any way.im after another with out the cut off.i have a old fog wash but the diaphragm as split and I cant find a spare.