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Old 12-14-2016, 04:39 PM
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Default Air in water lines

How does it get in there? I just had to bleed a cold water supply line to release an airlock in the vanity valve. Any ideas as to why this is happening?
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Old 12-14-2016, 05:33 PM
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Default Re: Air in water lines

Did the water dept recently do any water line repairs or upgrades?
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Old 12-14-2016, 10:39 PM
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Default Re: Air in water lines

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Did the water dept recently do any water line repairs or upgrades?
No. It's been worsening over time and has accelerated in recent months.
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Old 12-15-2016, 11:38 AM
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Default Re: Air in water lines

Well or city water?
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Old 12-15-2016, 11:41 AM
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Default Re: Air in water lines

The rubber bladder leaking on the expansion tank? Just a thought. I'm not a plumber....
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Old 12-15-2016, 11:47 AM
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Default Re: Air in water lines

City water, 100 year old house, copper supply lines, no expansion tank. Looks like my pressure regulator valve has a small leak. Could that be the culprit?
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Old 12-15-2016, 11:51 AM
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Default Re: Air in water lines

Yep, I'd guess that is the culprit.
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Old 12-15-2016, 12:02 PM
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Default Re: Air in water lines

I knew I had a leak once in the bathroom when the sink taps starting singing.
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Old 12-15-2016, 12:56 PM
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Default Re: Air in water lines

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I knew I had a leak once in the bathroom when the sink taps starting singing.
The imagination boggles!!!
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Old 12-15-2016, 02:08 PM
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Default Re: Air in water lines

If that is the culprit then you also have a small leak elsewhere. The only way for air to enter the pressurized system is for it to leak backwards behind a closed valve via the force of gravity.

You may have a small faucet leak that allows a back flow upstairs when you turn something on downstairs. Perhaps a toilet valve, or a damper tube ( prevents water hammer) in the walls of your 100 year old house that has a small corrosion leak.

A leaking pressure valve alone will be unlikely to create the condition all by itself. There has to be a backflow. Meaning the system is open elsewhere.

Is it hot or cold water? Sometimes the hot water heater will create steam in the line. Doesn't happen with an expansion Tank/valve.
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Old 12-15-2016, 04:09 PM
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Default Re: Air in water lines

It's in the cold water line. Other symptoms I'm noticing include water hammer when the washer stops drawing cold water, and more pronounced sputtering on the second floor fixtures after the laundry has run (washer is in the basement).

Laundry equipment is brand spanking new, and the upstairs sputtering happened with the old washer too.
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Old 12-15-2016, 04:22 PM
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Default Re: Air in water lines

Air bubbles do work their way up, as they are lighter than water. They easily get trapped in bends and can be tricky to get rid of.
I once read, never tried, that low pressure allows them in. Unhooking your washer and hooking a short hose from the hot to the cold and turning both on, then turning on water at the furthest spicket from the washer might force the 'bubble' out.
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Old 12-15-2016, 05:10 PM
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Default Re: Air in water lines

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Originally Posted by jpr62902 View Post
It's in the cold water line. Other symptoms I'm noticing include water hammer when the washer stops drawing cold water, and more pronounced sputtering on the second floor fixtures after the laundry has run (washer is in the basement).

Laundry equipment is brand spanking new, and the upstairs sputtering happened with the old washer too.
Water hammer is a sure sign the dampers are failing. If they leak air(it's how they work) they will fill with water and no longer cushion the sudden shut off of a washer solenoid valve.

This is all theory as I am not a plumber. Just a hack carpenter who has flipped a few houses. Old plumbing is a bane.
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Old 12-15-2016, 11:18 PM
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Default Re: Air in water lines

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Originally Posted by FrancSevin View Post
Water hammer is a sure sign the dampers are failing. If they leak air(it's how they work) they will fill with water and no longer cushion the sudden shut off of a washer solenoid valve.

This is all theory as I am not a plumber. Just a hack carpenter who has flipped a few houses. Old plumbing is a bane.
Thanks for the input, Franc. What's a damper?
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Old 12-15-2016, 11:21 PM
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Default Re: Air in water lines

Quote:
Originally Posted by Doc View Post
Air bubbles do work their way up, as they are lighter than water. They easily get trapped in bends and can be tricky to get rid of.
I once read, never tried, that low pressure allows them in. Unhooking your washer and hooking a short hose from the hot to the cold and turning both on, then turning on water at the furthest spicket from the washer might force the 'bubble' out.
Thanks, Doc. I just loosen the supply hose to an upstairs vanity faucet until all the air is forced out. Works every time.
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Old 12-16-2016, 11:54 AM
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Default Re: Air in water lines

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Originally Posted by jpr62902 View Post
Thanks, Doc. I just loosen the supply hose to an upstairs vanity faucet until all the air is forced out. Works every time.
Why don't you just open the faucet fully and let the air out?
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Old 12-16-2016, 12:08 PM
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Default Re: Air in water lines

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Why don't you just open the faucet fully and let the air out?
Because the air bubble, once big enough, creates an airlock which disables the valve for the faucet.
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Old 12-16-2016, 01:57 PM
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Default Re: Air in water lines

Buy a new house............
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Old 12-16-2016, 05:42 PM
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Buy a new house............
Drinking at 12:57 in the pm? Again? I would be too, if I enjoyed your level of success. Cheers, Fred!
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Old 12-16-2016, 06:58 PM
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Default Re: Air in water lines

I was drinking Diet Vernor's Ginger Ale. Neat.
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