External soil stack below window

[Grale]

Today I have had my internal soil stack removed and a new one fitted externally.

The soil pipe ends below my bathroom window with what i think is a durco valve fitted.

Several people have stated this does not meet building regs

2 questions

1) Is it within regulations to terminate the pipe below a window

2) using the durco valve, doesn't this stop the release of gasses. I though the idea was to allow free flow of gasses out of the top

 

[SimonG]

Who's the several people?

Spoke to the guy that did the work?

 

[SimonG]

Who's the several people?

Spoke to the guy that did the work?

 

[REDSAW]

did you get permission to change the out look of the property? you might not need it!
not suposed to use durgo valve outside as the jam with dust.
vent stack is not above toilet bowl either!

 

[ShaunCorbs]

its an air admittance valve

(one way) lets air in but nothing out

but a few more faults best get him back

 

[Grale]

Who's the several people?

Spoke to the guy that did the work?

Who? not builders and the reason i'm asking on here for professional opinions.

Not spoken to the guy yet as it may be a non issue.

 

[Grale]

its an air admittance valve

(one way) lets air in but nothing out

but a few more faults best get him back

What other faults?

 

[REDSAW]

the basin waste is not far enough away from the pan branch >200mm.
the top of the durgo should be min 100mm above opening window. (but there not recomended for outside as they jam open).

 

[Grale]

So you recommend taking the pipe above the window with an open vent in the soil pipe?

Thank you for your help.

 

[Grale]

So you recommend taking the pipe above the window with an open vent in the soil pipe?

Thank you for your help.

 

[REDSAW]

no, you need a meter above window opening without durgo.
its not installed correctly either way, typical builders own regs with picture teaching and no theory lessons!
soil stack changing comes under planning consent too from internal to external, but you might get away with it unless your selling up soon!

 

[Chalked]

Sorry lads, but you can use a durgo externally. It must be rated for outside use, so it won't freeze in winter. Even though a natural vent is better, as it lets the drain vent both directions.
There might be a good reason why it hasn't been taken throgh, or offset round the soffit. But as a minimum it should have been tight under the eaves.
Must have been short of pipe, or a good ladder :sosp:

 

[Chalked]

Sorry lads, but you can use a durgo externally. It must be rated for outside use, so it won't freeze in winter. Even though a natural vent is better, as it lets the drain vent both directions.
There might be a good reason why it hasn't been taken throgh, or offset round the soffit. But as a minimum it should have been tight under the eaves.
Must have been short of pipe, or a good ladder :sosp:

 

[REDSAW]

Sorry lads, but you can use a durgo externally. It must be rated for outside use, so it won't freeze in winter. Even though a natural vent is better, as it lets the drain vent both directions.
There might be a good reason why it hasn't been taken throgh, or offset round the soffit. But as a minimum it should have been tight under the eaves.
Must have been short of pipe, or a good ladder :sosp:

i know but it advises not to be used externally as they freeze or eventually jamb with dust and need exchanging! job half done imo.

 

[Chalked]

i know but it advises not to be used externally as they freeze or eventually jamb with dust and need exchanging! job half done imo.

I agree, always best to run a propper vent to atmosphere. But the answer is, you can use a durgo outside.

 

[Chalked]

i know but it advises not to be used externally as they freeze or eventually jamb with dust and need exchanging! job half done imo.

I agree, always best to run a propper vent to atmosphere. But the answer is, you can use a durgo outside.

 

[SimonG]

External rated durgo ok by regs, but not keen.

 

[SimonG]

Who? not builders and the reason i'm asking on here for professional opinions.

Not spoken to the guy yet as it may be a non issue.

Still didn't say who the several people were.

 

[REDSAW]

Still didn't say who the several people were.

bill n ben. the durgo men?

 

[chris watkins]

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

 

[chris watkins]

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

 

[REDSAW]

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]

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]

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]

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]

Everydays a school day

 

[Grale]

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

 

[SimonG]

Thanks for coming back and updating the forum with the outcome.
Surprising how many people use the advice on here without so much as a thankyou.