CP fittings run, and traps checked for leaks and smell
Why — act while you have leverage
A tap that runs is not a tap that is finished. Leaks at the connection and a missing trap seal both show up after you move in, and both are trivial to catch now.
What to look at
- Every outlet run to full flow, with the connection watched underneath
- Each trap filled and drained, then smelled
- Shower and diverter tested in every position
How to check it yourself
Run every tap and shower to full flow, and fill and drain every basin, sink and floor trap while watching the connection underneath. A drain smell means the trap is dry, wrongly fitted or missing — it is not something that settles down.
Where this comes from: NBC 2016 Part 9 (Plumbing Services); IS 2065 — water supply in buildings (indian standard or building code)