Pick up the incorrect statement regarding a master trap from the following: $\cdot$

- 1
  
  It is provided a cleaning eye at the top of the trap
- 2
  
  The height of fresh air inlet pipe fixed vertically with wall is 3 m
- 3
  
  The mica flap valve which opens inwards only, is fitted at the of the inlet pipe
- 4
  
  The water seal is less than that of ordinary traps

Display Comments

Leave a comment

Login at first then you can submit comment. Click here to login.