Top-filling tanks have a dip tube, which routes the incoming cold water to the bottom of the tank. They can become damaged or detached, allowing cold water to dilute the warmer water in the top half of the tank. They are easily replaced, just remove the incoming water supply nipple. Some tanks combine the anode rod with the dip tube, but if not, this is a great time to replace that, as well.
Zerobeat50125 t1_itszhie wrote
Reply to Water Heater Suddenly Only Produces Warm Water by PernPorson
Top-filling tanks have a dip tube, which routes the incoming cold water to the bottom of the tank. They can become damaged or detached, allowing cold water to dilute the warmer water in the top half of the tank. They are easily replaced, just remove the incoming water supply nipple. Some tanks combine the anode rod with the dip tube, but if not, this is a great time to replace that, as well.