External soil stack below window

chris watkins · Mar 21, 2017

ttps://www.gov.uk/government/uploads/system/uploads/attachment_data/file/442889/BR_PDF_AD_H_2015.pdf

REDSAW · Mar 22, 2017

chris watkins said:
Building Regulations Part H (2015) still states the following -
1.33 Ventilated discharge stacks may be terminated inside a building when fitted with air admittance valves complying with BS EN 12380:2002. Where these valves are used they should not adversely affect the amount of ventilation necessary for the below ground system which is normally provided by open stacks of the sanitary pipework. Air admittance valves should be located in areas which have adequate ventilation, should be accessible for maintenance and should be removable to give access for clearance of blockages. Air admittance valves should not be used outside buildings or in dust laden atmospheres. Where there is no open ventilation on a drainage system or through connected drains, alternative arrangements to relieve positive pressures should be considered.
Page 10 of H1

i knew i knew that from somewhere ingrained.lol

Chalked · Mar 22, 2017

chris watkins said:
Building Regulations Part H (2015) still states the following -
1.33 Ventilated discharge stacks may be terminated inside a building when fitted with air admittance valves complying with BS EN 12380:2002. Where these valves are used they should not adversely affect the amount of ventilation necessary for the below ground system which is normally provided by open stacks of the sanitary pipework. Air admittance valves should be located in areas which have adequate ventilation, should be accessible for maintenance and should be removable to give access for clearance of blockages. Air admittance valves should not be used outside buildings or in dust laden atmospheres. Where there is no open ventilation on a drainage system or through connected drains, alternative arrangements to relieve positive pressures should be considered.
Page 10 of H1

Looks like your right Chris.
A lot of "should's" in there! No mention of must, or must not.

Radioman · Mar 22, 2017

Regardless of Durgo or not to Durgo, you will "defo" need building control approval to sign the work off and usually you will need planning permission to move or install a soil stack to the outside of a building and make a new connection to the sewer. Also a little known fact is that not to do so will invalidate your buildings insurance and may contravene the conditions of any mortgage. Best make a quick phone call to the council imho.

chris watkins · Mar 22, 2017

Chalked said:
Looks like your right Chris.
A lot of "should's" in there! No mention of must, or must not.

As there always is with them but I think we can all agree even if the Durgo is approved for external use & there is ventilation at the head of the run etc, etc, why or why wouldn't you just stick an open vent pipe up to terminate above the top floor window ? it really is a no brainer.

SimonG · Mar 22, 2017

Everydays a school day 🙂

Grale · Apr 1, 2017

Radioman said:
Regardless of Durgo or not to Durgo, you will "defo" need building control approval to sign the work off and usually you will need planning permission to move or install a soil stack to the outside of a building and make a new connection to the sewer. Also a little known fact is that not to do so will invalidate your buildings insurance and may contravene the conditions of any mortgage. Best make a quick phone call to the council imho.

Thought i'd update the outcome.
Council came and checked the work last week and gave approval and signed it off.

Now, he was happy with the way it was done and was happy to sign it off there and then. I was very surprised after the comments here about the Durgo valve and the pipe being lower than the toilet waste. Anyway he did recommend that the pipe was extended above the gutter and left open naturally and remove the Durgo as they are troublesome. They either work or they don't and as we were getting drain smells back in the house i did as he recommended and extended the pipe and left it open.

I do think the council were more interested in the money than what had been done. It wasn't cheap for a 5 minute visit!!

Thanks all for the help and recommendations. Much happier now 🙂