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Water in VMC pipe.

Posted by GoneandDunit - Created: 3 years ago
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7 replies (Showing replies: 1 to 7)

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Posted by Joe-Huelgoat-383105 - 3 years ago

Kitchen and bathroom VMC exits are going to be loaded with humid air. As soon as the air hits the pipe in the loft it will condensate. Modern VMC units are designed to be left on 24/7 to keep air pumping up the pipes. Am I correct in assuming you have fitted a switch ?

Our bathroom exit is fitted with a humidity strip on the switch that will not allow the vent to close until only dry air is being extracted.

 

 

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Posted by geegee42 - 3 years ago

If they are exposed in the loft space then they really need to be insulated, you can replace the section that's giving you problems with a length of pre insulated stuff.

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Posted by GoneandDunit - 3 years ago

just standard flexi.

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Posted by geegee42 - 3 years ago

Are the existing pipes insulated or just the standard plastic extendable type?, 

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Posted by GoneandDunit - 3 years ago

Thanks folks.

No dips in pipe so will look for some kind of insulation.

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Posted by bifna-396742 - 3 years ago

Also, one of the flexible pipes might have dip in, allowing the water to accumulate due to the condensation.  If poss, trim off the excess and reattach. 

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Posted by geegee42 - 3 years ago

The vent pipes should all be insulated to stop problems with condensation, if the insulation is inadequate and you cannot get access to it then its difficult to cure, if you can get access then try more insulation.