How do you vent a bathtub trap?

My understanding is that the vent should be placed “behind” the trap and at least 2 drain pipe diameters distant. The vent access to get above the tub’s flood level is in front of the tub, the opposite direction of where it seems the trap should go.

Does a bathtub drain need a vent pipe?





Bathtubs should have a vent to help drain wastewater properly. All drains in your bathroom, from your bathtub to your toilet, need a plumbing vent stack. Without a proper vent, you may hear gurgling pipes, smell a putrid odor, or notice slow-draining water.

How far can a vent be from a tub drain?

The only vertical pipe of a combination drain and vent system shall be the connection between the fixture drain and the horizontal combination drain and vent pipe. The maximum vertical distance shall be 8 feet (2438 mm).

Does the trap have to be directly under the drain?

It is not ideal to have the p-trap below the the exit drain because water gravity has to force the water out instead of it flowing downwards naturally. They both work and have seen it many times. But essentially anything below already creates its own p-trap- so using another is redundant.

How do you reroute a plumbing vent pipe?

Quote from the video:
Quote from Youtube video: Make a cross right about here to connect to the existing vent line that vents the shower drain. But the problem is this copper water lines right on the way look at this copper line.

What is horizontal wet venting?





The wet vent shall be considered the vent for the fixtures and shall extend from the connection of the dry vent along the direction of the flow in the drain pipe to the most downstream fixture drain connection to the horizontal branch drain.

How far below drain should P-trap be?

Maximum Distance



However, the Universal Plumbing Code stipulates that the total developed length of all tailpieces, arms and fittings connecting the drain to the p-trap must be 24 inches or less.

Does a shower drain need a vent?

Vent Pipe Requirements for Showers



It’s easy to forget, but it’s a vital and required part of any plumbing fixture drain. The vent pipes remove sewer gases while allowing air into the system to help the water drain. Without a vent, your shower won’t drain correctly.

Do you have to put a trap on a shower drain?

According to regulations, all shower drains are required to have P-traps. This includes all fixtures connected to a building’s main plumbing system. P-traps are curved pipes installed under showers and drains of all kinds.

What can I use instead of AP trap?



Recently I discovered the amazing HepvO Waterless Valve. It’s a new solution to this old problem. Using a flexible silicon tube inside that seals out air but allows water to flow in one direction, it performs the same task without using any water and without being large and bulky like a p-trap.

How do you vent a shower drain?

Quote from the video:
Quote from Youtube video: And because my vent pipe was located above that and next to the drain. The venting the air was able to vent directly up into the drain pipe of the of the shower.

How does a waterless trap work?

Often employing a type of flexible self-sealing membrane, waterless traps open during use and allow waste water to flow through the fitting, but close once the waste water drains through the fitting. This self-sealing action allows water to flow, whilst preventing foul sewer gases from entering the building.

Can waterless traps be installed horizontally?



A relatively low cost solution that eliminates awkward, messy and time consuming fabrication work and can be fitted horizontally or vertically with a one-way flow valve that prevents back flow and seals out odours and gases.

What is a dry trap?

A dry trap. This is the most common cause of sewer odors. A trap is a very simple device that does a great deal of work. It is made from a U-shaped pipe or tubing, which connects on one end to the drain—such as a floor drain or the drain of a restroom fixture—and on the other end to the line going to the sewer.

What is an anti Syphon trap?

Anti-syphon traps, or anti vac traps as they are sometimes called, are used to avoid the possibility of the trap seal being drawn away by siphonage within the waste system. Siphonage generally occurs where there is a long run of waste pipe particularly if there is a steeper than normal fall on the pipe.

How do you get past an anti-siphon?

Use screwdriver to push aside flap over filler pipe



The flap allows you to insert a hose in but will jam when you try to remove the siphon hose. To bypass this, all you need is a long, skinny object like a screwdriver. Use the screwdriver to push the flap aside and hold it open.

When would you use an anti-siphon valve?



An anti-siphon faucet or valve is installed to prevent the backflow of dirty water into the clean water source. People use anti-siphon taps for outdoor plumbing, utility sinks, and mainly where a hose is attached to supply water outside of a home.