Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.

Plumber advises to keep air inlet when removing house trap

D107
D107 Member Posts: 1,906
in Plumbing

He advised that if replacing old house trap with straight pipe and cleanout, keeping the air inlet vent is advisable since it lets plumbing system breathe. Others have said that once trap is gone, the air inlet is no longer needed.

Comments

  • Robertw
    Robertw Member Posts: 31

    The fresh air vent on a house trap satisfies the plumbing code that every trap must have a vent. With removal of the house trap the home plumbing will be vented through the stack vent through the roof and possibly other fixture vents going thru the roof as well.

    House traps are no longer required in most areas.

    Robert W.

    Energy Kinetics

  • jumper
    jumper Member Posts: 2,389

    What is wrong with extra vents? I like inverted U s to prevent stuff falling into drain line.

  • Mad Dog_2
    Mad Dog_2 Member Posts: 7,540

    Nothing wrong with leaving it. Mad Dog

    Consulting by Mad Dog & Matt Jr.
  • Intplm.
    Intplm. Member Posts: 2,217

    When it comes right down to it, if you leave the vent installed it will be an extra vent. There's no harm in leaving it there.

  • Danny Scully
    Danny Scully Member Posts: 1,441

    I’d have to disagree. You now how the entire street (and more) venting out of the side of your house. It’s no longer a fresh air INLET, it’s just allowing sewer gases to expel at an unacceptable height off the ground. With the house trap installed, the fresh air INLET is in front of the trap, not behind it.

    D107
  • D107
    D107 Member Posts: 1,906

    @Danny Scully Very good point! One would think it would be against plumbing code to leave the air inlet in if there's no trap. One wonders how often plumbers find such a setup.

  • Mad Dog_2
    Mad Dog_2 Member Posts: 7,540

    Good point Grasshopper, but it's no worse than a street manhole cover. I'm keep my house trap and my Fresh Air Inlet.....Mad Dog

    Consulting by Mad Dog & Matt Jr.
    Intplm.
  • jumper
    jumper Member Posts: 2,389

    Real stench comes when house trap leaks and there's no vent.

  • dopey27177
    dopey27177 Member Posts: 908

    Nothing wrong leaving house trap.

    I had a call once that a woman dropped her 3 carrot engagement ring in the water closet an accidentally flushed down the drain, told her to wait two weeks to allow the ring to eventually reach the house trap.

    When I got to the job using a small soup ladle eventually got the ring out of the house trap.

    what came out first was some grease then some small pocket change then the ring.

    Krrp your house trap, occasional cleaning is required.

    Jake

    Steam: The Perfect Fluid for Heating and Some of the Problems
    by Jacob (Jake) Myron

Categories