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No Hot Water Pressure

After de-winterizing

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#1 mkenway

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Posted 16 January 2014 - 08:28 PM

After I de-winterized, I don't have any pressure on the hot water line. The pressure on the hot lines, drops off to a trickle. If I open a second faucet in the hot-cold mix position, it will increase the pressure on the hot line in the other faucet. If I open two faucets in the hot position, it's as if it creates a vacuum and I get only a dribble. I have released the pressure on the water heater until water runs out. I'm puzzled as to why I get pressure on the cold line but no on the hot!

Any suggestions as to what might be causing this?

08 ITASCA


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#2 netop43

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Posted 16 January 2014 - 08:52 PM

Is there a bypass valve on the water heater that is still open?


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#3 StellersJay

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Posted 17 January 2014 - 06:08 AM

This is not your problem, but after de-winterizing I have had plugged strainers on the faucets and they had to be cleaned before I had flow at the faucet.  Since you have pressure on the cold side, but not the hot side, I would suspect what "Newbie" above said.

 

Sam


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#4 wolfe10

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Posted 17 January 2014 - 07:52 AM

Another common issue (assuming bypass valves are completely open to the water heater) is for minerals to restrict flow through the check valve at the back of the water heater.


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#5 mkenway

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Posted 17 January 2014 - 11:17 AM

The by-pass valve is in the normal position. I have heard since my post that it may be a check valve at the end of the HW tank. If it sticks, it won't let water flow in the correct direction.

Any thoughts?
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