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Old 07-11-2019, 08:10 PM   #1
jlonginav
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Possible air in water line

Every once in awhile when i dry camp, I get what I think is a air bubble in the water lines leading to the shower. It really shacks good. Happens whenever the pump is on, not just when the shower is running. Do you all have a order you turn on your sinks / showers after filling up your tanks?
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Old 07-11-2019, 09:29 PM   #2
bobbecky
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We rarely have an empty water tank, so never have the situation where we have to pump air to prime the pump. The quickest way is to open a couple faucets while the pump is running until water flows, then your system is ready for use without any surprises.
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Old 07-12-2019, 08:38 AM   #3
JRTJH
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I think what you're saying happens is that every once in a while you get a "blast of cold water" in the shower?

If that's what is happening, if you turn the shower water control off, it will "back up cold water into the shower hose". That will cause a burst of cold water as soon as you turn the shower water control back on...

If what's happening is that you get a blast of cold water while the shower head is flowing, even without touching the water control valve, then you might want to first verify that the bypass valve on the back of the water heater is completely turned to flow water into the water heater (ie: bypass valve off). If that is positioned properly and it continues to occasionally "blast cold water for no reason" then I'd look at the one way valve at the hot water discharge connection on the water heater. That valve may be sticking, then closing slightly when water pressure changes and some flow occurs through the bypass pipe from the lower (cold water inlet) to the upper (hot water outlet).

If it's none of these, then I'm not sure what may be happening.
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