Internal Soil Pipe

Norman_Castle

grumbler said:

Norman_Castle said:

Can narrower rectangular pipe be used to reduce the area the pipe takes. The type often used for extractor fan venting? Is there similar watertight pipe for plumbing?

Why rectangular, not round - especially as adaptors for ducting are 100mm and soil pipe is 110mm? If you mean rectangular with the same cross-section, then the difference in size will be minuscule - 11%.

I am no expert, but what I see is

Replacing 100mm round pipe with 50mm x X wide giving the same area would be a 50% reduction in  depth. 

plumb1_2

Norman_Castle said:

grumbler said:

Norman_Castle said:

Can narrower rectangular pipe be used to reduce the area the pipe takes. The type often used for extractor fan venting? Is there similar watertight pipe for plumbing?

Why rectangular, not round - especially as adaptors for ducting are 100mm and soil pipe is 110mm? If you mean rectangular with the same cross-section, then the difference in size will be minuscule - 11%.

I am no expert, but what I see is

Replacing 100mm round pipe with 50mm x X wide giving the same area would be a 50% reduction in  depth. 

If a plumber did that they’d be shouting of cowboys

MikeJXE

Apodemus said:

grumbler said:

MikeJXE said:

IMO it would be better to relocate it to outside 

Unfortunately, AFAIK, the valve can't be outside (of a house)

I was assuming that MikeJXE was meaning conversion to a traditional vent stack, rather than an AAV?

Thats true, take it up- past the edge of the roof 

grumbler

plumb1_2 said:

Norman_Castle said:

grumbler said:

Norman_Castle said:

Can narrower rectangular pipe be used to reduce the area the pipe takes. The type often used for extractor fan venting? Is there similar watertight pipe for plumbing?

Why rectangular, not round - especially as adaptors for ducting are 100mm and soil pipe is 110mm? If you mean rectangular with the same cross-section, then the difference in size will be minuscule - 11%.

I am no expert, but what I see is

Replacing 100mm round pipe with 50mm x X wide giving the same area would be a 50% reduction in  depth. 

If a plumber did that they’d be shouting of cowboys

Who they and why?

plumb1_2

MikeJXE said:

Apodemus said:

grumbler said:

MikeJXE said:

IMO it would be better to relocate it to outside 

Unfortunately, AFAIK, the valve can't be outside (of a house)

I was assuming that MikeJXE was meaning conversion to a traditional vent stack, rather than an AAV?

Thats true, take it up- past the edge of the roof 

1 mtr above any opening windows min.

MikeJXE

Norman_Castle said:

grumbler said:

Norman_Castle said:

Can narrower rectangular pipe be used to reduce the area the pipe takes. The type often used for extractor fan venting? Is there similar watertight pipe for plumbing?

Why rectangular, not round - especially as adaptors for ducting are 100mm and soil pipe is 110mm? If you mean rectangular with the same cross-section, then the difference in size will be minuscule - 11%.

I am no expert, but what I see is

Replacing 100mm round pipe with 50mm x X wide giving the same area would be a 50% reduction in  depth. 

Not possible to be square as solids would collect in the corners

grumbler

MikeJXE said:

Norman_Castle said:

grumbler said:

Norman_Castle said:

Can narrower rectangular pipe be used to reduce the area the pipe takes. The type often used for extractor fan venting? Is there similar watertight pipe for plumbing?

Why rectangular, not round - especially as adaptors for ducting are 100mm and soil pipe is 110mm? If you mean rectangular with the same cross-section, then the difference in size will be minuscule - 11%.

I am no expert, but what I see is

Replacing 100mm round pipe with 50mm x X wide giving the same area would be a 50% reduction in  depth. 

Not possible to be square as solids would collect in the corners

What solids?! It's a vent pipe. Only air.

But yes, it has to start at certain height.

MikeJXE

grumbler said:

MikeJXE said:

Norman_Castle said:

grumbler said:

Norman_Castle said:

Can narrower rectangular pipe be used to reduce the area the pipe takes. The type often used for extractor fan venting? Is there similar watertight pipe for plumbing?

Why rectangular, not round - especially as adaptors for ducting are 100mm and soil pipe is 110mm? If you mean rectangular with the same cross-section, then the difference in size will be minuscule - 11%.

I am no expert, but what I see is

Replacing 100mm round pipe with 50mm x X wide giving the same area would be a 50% reduction in  depth. 

Not possible to be square as solids would collect in the corners

What solids?! It's a vent pipe. Only air.

But yes, it has to start at certain height.

It's not just a vent pipe it carries solids from the loo downwards into the drain 

grumbler

No, I think the suggestion was for the vent pipe only.

Norman_Castle

MikeJXE said:

grumbler said:

MikeJXE said:

Norman_Castle said:

grumbler said:

Norman_Castle said:

Can narrower rectangular pipe be used to reduce the area the pipe takes. The type often used for extractor fan venting? Is there similar watertight pipe for plumbing?

Why rectangular, not round - especially as adaptors for ducting are 100mm and soil pipe is 110mm? If you mean rectangular with the same cross-section, then the difference in size will be minuscule - 11%.

I am no expert, but what I see is

Replacing 100mm round pipe with 50mm x X wide giving the same area would be a 50% reduction in  depth. 

Not possible to be square as solids would collect in the corners

What solids?! It's a vent pipe. Only air.

But yes, it has to start at certain height.

It's not just a vent pipe it carries solids from the loo downwards into the drain 

Above the height of any toilet or sink or bath drain it is just a vent so why does it need to be either round or of the same size as pipework which carries waste water? The question was does this exist which the answer seems to be no although its not clear why not. I understand why the soil pipe is 100mm but why does the vent pipe need to be the same size?