DIYer - need help with toilet pipe air-valve install

[pc__upf]

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.

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.

 

[Trotter31]

What part of the country are you in?
There will probably be someone on the forum, who is in your neck of the woods.

 

[pc__upf]

For sure. But I'm a bit tired of calling, waiting, calling again and so on. My trusted plumber has resurfaced after 8 weeks of voice messages and texts. Eight!!!!! He promised a call after Easter. I'll report back.