Changing the Hot Water stop valve under the sink

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Old 02-14-09, 12:02 PM
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Changing the Hot Water stop valve under the sink

Hey I'm going to be changing my hot water supply valve to my kitchen sink. Do I need to worry about ruining my gas water heater when I shut off my main water supply and draining the hot water pipes and water heater (I assume drains at the same time) while changing the valve? If there is some kind of protection built into a water heater could I just shut the supply to the water heater off and drain only the hot side of the house when changing this valve?
 
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Old 02-14-09, 12:14 PM
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Old 02-15-09, 06:23 PM
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Hi No need to drain the heater. Shut the water to the heater off or main line. Turn on the faucet you want to work on and let it drain then with a pan placed under the angle stop loosen the line from the stop to the sink and let it drain into the pan then slowley remove the valve.
Good Luck woodbutcher
 
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Old 02-15-09, 09:37 PM
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Thanks woodbutcher, I appreciate the help. So water heaters must have a safety that wont allow an empty tank light. i was hoping that was the case but i didnt want to ruin a water heater changiing an eleven dollar valve. Thanks again
 
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Old 02-16-09, 11:27 AM
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So water heaters must have a safety that wont allow an empty tank light.
Not even close to that. What Woodbutcher was alluding to is that once the pressure in the system is released the water heater most likely will remain full of water as long as there is not a cold water faucet lower than the water heater left open.

I would suggest that you turn the combination gas valve to the Pilot position before turning off the water and then turning it back to On after you finish the job. Do not turn the gas completely off or it will be necessary to re-light the pilot.
 
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