How Long Does It Take to Drain a Water Heater? Average.. Draining a water heater can take anywhere between five and fifteen minutes, depending on the following factors. 1. Tank Capacity. In general, the larger the tank capacity, the longer it takes to drain the water heater. For example, suppose you have a 40-gallon water heater and a 60-gallon unit.
How Long Does It Take to Drain a Water Heater? Average. from 2yuji79eutrt8fuy48ewvhkr-wpengine.netdna-ssl.com
Most 40-gallon units incorporate a high-pressure valve, so you can expect it to drain in just about 4 minutes. Compared to a 60-gallon unit, which drains longer (an hour or so), it is.
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