Hi I am new to this and have tried to check building regulations and just got more confused. I have a main vented stack going from the hole in the floor all the way up and out of my roof. I want to put two toilets one into each our master suites one toilet is 3 meters from the vented stack and the other continues a further 3 meters so in total the max distance of horizontal pipe on the stack branch is 6 meters. I understand I need a fall inline with the regs but I cannot gain a clear message as to if I need an additional vent. If I do can I run it up to the loft and horizontally back to the main stack and tee it in? As I said new to this so any advice would be appreciated.
Shouldn't need an additional vent. http://webarchive.nationalarchives....gportal.gov.uk/uploads/br/br_pdf_adh_2002.pdf
Thanks for your reply, that will make my life easier. Do you know if there is a regulation distance or what is it that would dictate the need for an additional vent? I understand what the vent will do and what it helps prevent however I am keen to understand when you should install one.
But,the maximum distance is 3mtrs from a stack for a single toile I think, it's all to do with solids & gradients, but I just can't remember the figures. Look at WC manifold system,but I can't find the regs about it.
So looking at the regs and if I understand it correctly, page 9 diagram 3 it shows a WC with min 18mm fall total 6M away on a unvented pipe. I have also looked at page 10 section 1.20 and it tells me to check table 2 and diagram 3. Having checked these I can now see that I do not need an additional vent. Please correct me if I have read or understood this incorrectly.
My building services book mentions to use a 50mm vent pipe (for discharge pipe 75-100mm). The 50mm pipe needs to be combined in common vent, this can be carried to outside air or connect to stack above spillover level. The system is referred to a Fully Vented One-pipe System commonly found in factories, schools and hospitals where there are a number of sanitary appliances.
I cannot find any regs for two WC and have found loads of images and general conversations about multiple WC on one horizontal branch and assume it is ok to do. I don't see what the difference is for one, two or three WC on a branch will be as long as the last one is no more than 6mtrs and everything has the correct fall. What do you think?
I thought it was just me, I just wish they would write them in plain English and provide more pictures.
You need to be careful with connection to your horizontal pipe run & the branch you use, so when second toilet is used, solids,paper,etc don't get trapped on first toilet branch. Wonder if the WC manifold system idea would be better for first toilet were they use a manifold branch,so everything drops in to the pipe.
Ventilation is only necessary when more than 8 WC's on the horizontal branch according to G.J Blower (Plumbing and Mechanical Services - Book 2) With access left at the end via T according to Fig 9.7. Which presumambly is left for rodding.
I'm installing a downstairs bathroom 8 meters away from the soil pipe. I am a bit confused about the regulations. If it is a single WC the maximum distance is 6 meters . If it is a bathroom with shower, sink and toilet 15 meters? Thank you