Conventional water heaters store water in a tank and are available in a variety of gallon capacities. Electric or gas energy is needed to maintain the water at a set temperature until the faucet is turned on which will cause the water to be pulled through the pipe. A proper working water heater will deliver water at a desired temperature until the capacity of the tank is used up. it usually takes 30-45 mins to recover a tank of hot water. If your water heater makes noises or doesn’t make as much hot water as it used to then give us a call.