General guidance only — all construction work must be overseen by a supervising engineer This handbook is compiled from standards and laws with every source cited, andis being reviewed for certification by engineers Use it to know what to look at, what to ask and what evidence to request on site It is not an engineering determination and can't replace an engineer · Terms of use · Limitations of the handbook

Building systems

Sanitary vent pipes

Page code P42 · 41 inspection criteria · 3 illustrations

Most houses with smells from the pipes don't have a problem with the sanitaryware but with one pipe that no water flows through and that can't be seen from anywhere in the house: the vent pipe. Thai law mentions only two things about this pipe: a diameter of no less than 2.50…

This page contains
Thai law mentions this pipe in only two ways — and you must cite the right regulation
Why smells come up without a vent pipe — the mechanism explained in one picture
Find out whether this house has a vent pipe — and three moments when you can still find out
Where the pipe end comes out — turning “smell must not bother others” into a decision
Four things Thai standards don't cover, which the project engineer must specify
A house already lived in that smells — a sequence for finding the cause yourself

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