Vaillant condensate into washing machine stand pipe

[green4rrow]

hi, i have a 40mm boss connection at the top of a horizontal soil stack that runs in the room. I'm intending to put a washing machine stand pipe at the end of this.

I also have a Vaillant ecotec pro 28 boiler next to where the washing machine will sit and was hoping to get the GSR to reroute the boiler condensate internally once this lockdown is over (currently goes outside). Before i complete fitting the washing machine stand pipe was just wondering where the boiler condensate would be best incorporated so i can add in a 40mm swept tee where the GSR can weld in the 21mm condensate piping.

I understand my boiler has a 145mm trap incorporated but just want confirmation on whether the tee would end up before or after the washing stand pipe p trap.

page 14 of the maintenance manual has a bit more information about what the manufacturer recommends for anyone that understands better than i do.

https://www.vaillant.co.uk/downloads/aproducts/ecotec-pro/combi-2/24-28/ecotec-pro-24-28-installation-manual-1414773.pdf

 

[EvilDrPorkChop]

I would fit your Tee before the stand pipe, but I think some pictures of your set up might help.

 

[green4rrow]

thanks, not at home to take a picture but have tried drawing it out.

soil pipe is laid horizontally and going to be subfloor. it comes from the downstairs toilet
green pipe currently going outside. wanting it all internal to be done by GSE
red pipe is 40mm washing machine stand pipe with p trap and bossed into soil pipe. want to incorporate the swept tee in here

hope that helps

 

[king of pipes]

As above s picture of the proposed connection would help ?

 

[king of pipes]

I would use one of these and add a separate connection into the soil pipe for the condense. Kop

 

[green4rrow]

thanks kop, and apologies as it seems to be taking a while for replies to be approved.

only reason i was questioning where in the WM stand pipe was because i understood the MI to suggest it should go into a vertical part of an internal soil pipe if it went directly. dont think that'd be necessary in this instance?

a) preferably the discharge pipe should run and terminate internally to the house soil and vent stack (at least 450 mm above the invert of the stack). A trap giving a water seal of at least 75 mm (3) (built into the boiler) should be incorporated into the pipe run, and there must be an air break (4) in the discharge pipe upstream of the trap.

 

[Scott_D]

Separate into the stack would be best if possible

 

[green4rrow]

thanks all, so straight into soil pipe seems to be the consensus. will that just go in with the above soil pipe boss and a 32mm to 22mm reducer without a trap/air break?