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Discuss DIYer - need help with toilet pipe air-valve install in the Plumbing Forum | Plumbing Advice area at PlumbersForums.net

Hi,

New to the forum - hoping to get some help here.

I am rerouting my toilet to have the pipe work hidden in the eaves.

IMG_0337.jpg

Bath/shower/basin waste connects to the toilet drain via Barco Bos.

I need help with the air vent.
- Do I need one for toilet, and another for shower/bath/basin waste?
- Do I need one for each bath, basin and shower?

Where is the best location for the air valve (or valves)?

Many thanks for your help.
 

chris watkins

Esteemed
Plumber
Is the stack vented to outside air or is there another stack on your system that vents?
What is a Barco Bos?
What size is the waste float picking up the bath & shower & how long is the run to the bath?
 
I fink op means a strap on or glue boss to put the 1 1/2 inch waste into the 4 inch. If its inch and quarter ..uck. chking
 
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ShaunCorbs

Staff member
S. Mod
Plumber
Gas Engineer
Boxing and run to the right off the toilet
 
Gents, thanks for your replies.

Yes, perhaps not the most logical approach but I'd like to try before giving up. This will make space available that was previously unavailable.

The bos (or boss) connects the 40mm on to the 4 in pipe.

It is not going uphill - there is a drop of about 450mm from toilet outlet to outside stack. Is this sufficient?

The stack can be vented outside, but will it take care of the basin/bath/shower pipe venting?

Adding rodding point to the planning.
 
Last edited:

Riley

S. Mod
Plumber
Gas Engineer
I would say it will block in no time at all have you contemplated 45° bends
 
I have contemplated 45° bends, but they really complicate things. Pipe going in between joists, etc.

For what it's worth, i'm using wide 90° bends (don't know the actual name). Still bad?

IMG_0338.jpg
 

Riley

S. Mod
Plumber
Gas Engineer
It’s more the proximity of the bends. Every turn causes resistance and friction to the nasties trying to run away. Sometimes the easy option isn’t the right one
 

ShaunCorbs

Staff member
S. Mod
Plumber
Gas Engineer
Swept bends (what there called)
 
Thanks ShaunCorbs.

Riley -
would swept bends solve the problem in my planned setup, or do you still find them a problem?
 

Riley

S. Mod
Plumber
Gas Engineer
I wouldn’t were it me and based on the angle there you are eating up more and more space
 

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