I have a State electric compact water heater model 6-120. When I run the faucet it seems to take a long time for the water to run hot. About a minute or two. When I take a shower I can run the hot water for about twenty minutes and then it goes cold.
Is this normal? I live in a three bedroom, two story townhouse. But I'm the only one living here. The shower is on the second floor. The water heater is on the first floor. But even the tap closes to the water heater takes too long to warm up. Do I have a problem? A plumber installed it for me in 2012.
Also, do I need to do anything to maintain the water heater or to improve performance. Like flush it or something?