Extractor ducting condensation run off

[bathjobby]

On vertical ducting for a shower room extractor fan fitted with a condensation trap, any (sensible and practical please) suggestions on where to run the condensation pipe ? obviously not directly into soil stack due to fumes etc. Whats your practical experience guys as I have not seen this type of trap fitted before.

 

[nstreet]

Out through the soffit.

 

[bathjobby]

Thanks nstreet. Was thinking that the lower on the vertical pipe the trap is fitted the better which puts it level with the soffit, but thanks anyway.

 

[kevplumb]

run it to the stack just make a running trap with 4 elbows/bends

 

[ChrisR]

You CAN just provide a container to collect the run off, (like they do at the back of a fridge!) cos you don't get very much and it evaporates between showers. Have put one of these in a stud wall, checked with a wee spy hole, which got filled later.

 

[Nige F]

Was that like the spyholes Norman Bates used to make in the Motel walls

 

[bathjobby]

Thank you guys. Think I'll go with running it to the stack through a u bend which I'll prime with water so no smells whilst waiting for enough condensation to fill the bend. Thanks kevplumb.

 

[chrishutt]

I'm afraid a trap in the condensate pipe will dry out if condensate flows aren't sufficient. As ChrisR says, there won't be much condensate. You could probably run it through an external wall like an overflow pipe.

 

[bathjobby]

I'm afraid a trap in the condensate pipe will dry out

Why are you afraid of this ?

 

[chrishutt]

The poster was intending to run condensate pipe into soil stack, with trap to block smell from soil stack. Need I say more?

 

[ChrisR]

Bit of a sledgehammer on a peanut but you could use a Hepv0 trap - they're closed all the time, no need for water.

The container I spied on collected no more than a few drops of water, & that was on about 7m of ducting!

 

[PTH]

Why is a condensate trap required in a vertical duct? Surely the wetness that does condense out of the air stream will run down the duct wall and fall back into the shower enclosure.

 

[nstreet]

Why is a condensate trap required in a vertical duct? Surely the wetness that does condense out of the air stream will run down the duct wall and fall back into the shower enclosure.

Assuming that the run is vertical with no bends

 

[ChrisR]

My fan inlet is right above the shower. I would NOT like it to drip water !