The two best water heater drain valves are the Everbilt T-30 and the Fluidmaster Universal.

The Everbilt T-30 is made of cast iron and has a 3/4-inch NPT thread. It has a maximum temperature of 210 degrees Fahrenheit and a maximum pressure of 150 psi. The Everbilt T-30 is a universal fit for all water heaters. It is easy to install and comes with a drain pan. The Everbilt T-30 is backed by a one-year limited warranty.

The Fluidmaster Universal is made of brass and has a 3/4-inch NPT thread. It has a maximum temperature of 180 degrees Fahrenheit and a maximum pressure of 100 psi. The Fluidmaster Universal is a universal fit for all water heaters. It is easy to install and comes with a drain pan. The Fluidmaster Universal is backed by a five-year limited warranty.

The Everbilt T-30 is the better water heater drain valve. It is made of cast iron, which is more durable than brass. It has a higher maximum temperature and pressure. It is backed by a one-year limited warranty.

The Fluidmaster Universal is the better water heater drain valve. It is made of brass, which is more durable than cast iron. It has a higher maximum temperature and pressure. It is backed by a five-year limited warranty.