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The two pipes going into the heater should be marked with either Hot and Cold or a H and C. There should be a shut off valve on the cold side, but sometimes there is one on both sides. If the piping is visible, you can follow one or the other to where it comes into the house. The water heater is usually the first thing the water line runs to.
What else can I help you with?
What is causing air in the hot water line but not the cold and it started after the hot water heater and vacuum breaker were replaced 3 months ago and has not stopped?
I think the only reasonable answer can be that the cold and hot water inlet/outlets are reversed. your hot water line is attached, at the heater to the cold water inlet or your hot water outlet is too short inside of the tank
Hot water heater the we just rerouted from bathroom to attic isn't filling... no leaks and cold water works and the tank will only fill when cold water is going ... anyone know anything about that?
Check piping. Make sure cold line going into cold side of water heater and hot side coming out hot side. Cold feed for water heater should come off main cold line. Make sure valves are open to and from water heater.
Can a hot water heater siphon to cold water faucet?
A hot water heater is designed to supply hot water to faucets, not cold water. It is not possible for a hot water heater to siphon into a cold water faucet. Each faucet is connected to either the hot or cold water supply lines, which are separate in a plumbing system.
How do I turn off the water to the hot water heater?
To turn off the water to the hot water heater, locate the shut-off valve on the cold water supply line leading to the heater. Turn the valve clockwise to shut off the water flow.
Why is the hot water pressure low in my kitchen sink while the cold water pressure remains fine?
The low hot water pressure in your kitchen sink could be due to a clog or blockage in the hot water line, a faulty hot water valve, or a problem with the hot water heater. The cold water pressure remaining fine suggests that the issue is specific to the hot water system. It may be necessary to check and repair the hot water line or heater to restore proper pressure.
Why is my cold water hot?
Your cold water may be hot due to a malfunction in your water heater, where hot water is mixing with the cold water supply. This can happen if the water heater's thermostat is set too high or if there is a cross connection in the plumbing system.
Can you use a vacuum breaker on a hot water heater to keep from emptying it when draining house pipes in winter?
Yes install it on the cold water line as close to the heater as possible.
Why does kitchen sink only have cold water?
Because hot water heater breaker has tripped, or hot water heater has failed.
Do you use the water heater when you use just cold water?
If water is only drawn from the cold faucet, then no, the water heater is not involved. However, if water is drawn from the hot faucet- even for a few seconds- hot water IS withdrawn from the heater, and fresh cold water drawn in to be heated- even if the hot water did not make it all the way through the pipe to the faucet- and the water heater will work to heat that fresh cold water.
Why do you have hot water running on the urinals?
Either this is a plumbing mistake or the cold water has been switched off and the hot water heater is draining. If no cold line valve has been turned off. It may indicate a burst pipe.
Which pipe goes to hot water heater?
Cold water pipe.
How do i know when my hot water heater is broken?
When you want to know when your hot water heater is broken, simply run your faucet and test the water. If it's cold, the heater is broken.
