I don't doubt that, almost all of the reviews I saw said the valve leaked at the stem. Open or closed did not matter. Maybe a different brand is better. Also from my experience quality has gone down on everything in the last 20-30 years.Maybe if one regularly opens/closes this valve they will fail but my similar valve hasn't failed since I closed it in 1994. I'll bet similar valve will outlast factory heater valve & it's a lot cheaper & easier to install.