Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here


Gully trap replaces vent stacks??

Gully trap replaces vent stacks??

Gully trap replaces vent stacks??

Hi all,

My question is if I have a Gully trap in my Drain Waste and Vent plumbing system, I do not need to add vent stacks or another venting system in my Drain Waste and Vent plumbing system?
This is because I am working in a project of a house residential village but using New Zealand Specs, and in my country the normal is The International Plumbing code.
I want to know also if this thing of Gully trap is something only of the new Zealand plumbing code or it is also use in the international plumbing code.

Thanks in advance

RE: Gully trap replaces vent stacks??

It appears to be a "master trap" which used to be used to prevent vermin and exterior sewer gases from entering the building. It is not allowed per the IPC, but check your local AHJ, because they tend to edit the IPC for their local codes.

RE: Gully trap replaces vent stacks??

Never heard of a Gully trap.

All traps are intended to provide a seal to prevent sewer gases and vermin from entering the occupied spaces of a building as Pedarrin said.

Vent systems are required to maintain a pressure balance between the two sides of a trap and facilitate smooth flow through the trap. Without a vent system, pressure differentials on the sewer side can move water in a trap to break the trap's seal, negating the purpose of the trap. Improperly sized or located vents can cause siphonage of the trap or a blow out.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


White Paper: Industrial Control Basics: Contactors
A contactor is an electrical device used for switching an electrical circuit on or off. Considered to be a special type of relay, contactors are used in applications with higher current carrying capacity, while relays are used for lower current applications. Download Now
Research Report: State of IoT Adoption in Product Development 2019
This research report, based on a survey of 234 product development professionals, examines the current state of Internet of Things (IoT) adoption by product design teams, its perceived importance, and what features and capabilities teams consider important when making decision about adding IoT functionality to their products. Download Now
Research Report: Augmented Reality for Maintenance, Repair and Overhaul (MRO)
The term Industry 4.0 denotes a cluster of technologies that’s poised to fundamentally reshape manufacturing and bring about a new industrial revolution. These include 3D printing (AM), the Industrial Internet of Things (IIoT), artificial intelligence (AI) and mixed reality technologies, more commonly known as virtual reality (VR) and augmented reality (AR). Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close