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Old 10-27-2012, 01:13 PM   #1
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air bubble in upstairs system!


Whenever someone in my house has a bath, 50% of the time this will lead to all the cold water upstairs not working. It's an air bubble in the pipe somewhere which is the cause. I have tried various methods to fix this problem each time it occurs, including using a Hoover to try n suck it out; fixing a tube from a working tap onto a not working one. But the only sure way we have fixed this for years is to blow air from the mouth into the open cold tap,and it usually dislodges the bubble. The problem is that blowing that much air is a massive pain, often leaving me feeling like I'm gonna collapse!
My question is:surely there is an easier way to solve this problem, or what is the cause of it?if I knew I could try and prevent it happening again.

Thanks for any help you can provide

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Old 10-27-2012, 02:06 PM   #2
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try running cold water at all affected taps while filling tub..this may work OR at least lead you to the cause by observing the water flows..How's the water pressure? Do you have copper pipes or old plugged up galvanized OR if new PEX..may be collapsing the common tubing somewhere in the supply.

weird or what!

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Old 10-27-2012, 04:22 PM   #3
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are you on a well? the water pressure should push out any air in the line if you have good pressure. sounds more like some sediment in the line.
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Old 10-27-2012, 04:35 PM   #4
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Quote:
Originally Posted by techpappy
try running cold water at all affected taps while filling tub..this may work OR at least lead you to the cause by observing the water flows..How's the water pressure? Do you have copper pipes or old plugged up galvanized OR if new PEX..may be collapsing the common tubing somewhere in the supply.

weird or what!
That's a very good idea!I will certainly try that next time. The water pressure isnt that strong,normal I would say, and I have no idea what the pipes are made out of. My house is 25
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Old 10-27-2012, 04:36 PM   #5
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[QUOTE="giodiy"]

That's a very good idea!I will certainly try that next time. The water pressure isnt that strong,normal I would say, and I have no idea what the pipes are made out of. My house is 25 years old and in London so I assume they'd be copper pipes.
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Old 10-27-2012, 07:37 PM   #6
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I think you have diagnosed this wrong----any air in a pipe would be passed without issue,by opening the nearest faucet.

I agree with DannyT---Look for sediment in the faucet valves--shutoffs or cartridges---
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Old 10-27-2012, 07:42 PM   #7
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how many locations does it happen at and what are the affected fixtures
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Old 10-27-2012, 08:41 PM   #8
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Old steel pipes?
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Old 10-28-2012, 06:12 AM   #9
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Quote:
Originally Posted by jaydevries
how many locations does it happen at and what are the affected fixtures
It happens at the upstairs bath cold tap,the basin cold tap,and also the toilet flush will not refill during this time, so essentiallly I think its the entire upstairs floors cold water supply that stops working.
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Old 10-28-2012, 06:15 AM   #10
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Quote:
Originally Posted by oh'mike
I think you have diagnosed this wrong----any air in a pipe would be passed without issue,by opening the nearest faucet.

I agree with DannyT---Look for sediment in the faucet valves--shutoffs or cartridges---
Could sediment really be the issue? How do I look in the valves? I'm sorry, I have no idea where to find the valve,or check if there is sediment inside?
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Old 10-28-2012, 06:17 AM   #11
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Quote:
Originally Posted by joecaption
Old steel pipes?
Would old steel pipes cause such a problem? I suppose my pipes could be steel,like you suggest..
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Old 10-28-2012, 07:40 AM   #12
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Steel pipe rust from the inside out, at some point it is going to at least leak, some will burst, and the inside Dia. gets smaller and smaller restricting flow which reduces pressure to the fixtures.
Also as the rust flakes off it stops up toilet flush valves, aeriators on faucets, locks up anti scald valves in the control valve in the tub, loads up the bottom of the tank on water heaters.
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Old 10-28-2012, 07:43 AM   #13
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You have the following valves in your system---

Shut off under the sink and toilet--
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Old 10-28-2012, 07:46 AM   #14
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Sink faucet
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Old 10-28-2012, 07:48 AM   #15
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Toilet flush valve

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