If you set two fixtures side by side, the minimum distance between their centers is 30 inches. Horizontal Drain, Maximum Number of Fixtures: 1-1/4" dia: 1: 1: 1-1/2" dia: 2: 1 (or 2 sinks) 2" diam: 16: 8: 2-1/2" dia: 32: 14: 3" diam: 48: 35: 4" diam : 256: 216 : Notes to the table above. Fall To P-Trap; Author: Anonymous User Is there a min. Discussion Starter • #1 • Nov 8, 2010. The local building inspectors advised me that maximum drop was 8 inches; another inspector there was no maximum particularly for traps beneath the first floor, although you shouldn't exceed 24 inches. Basic math tells me that the bottom of the tub would only need to be about 4-5 inches higher than the inlet. The minimum is sort of dictated by the size of the pipes and trap fittings. Some codes show 2 ft for 1-1/2 pipe but people fudge on that some with no problem . (i.e. That is exactly what he needs. 6 dfu should cover a washing machine by itself, but the minimum vent and drop through the floor is supposed to be 2", and the drain is supposed to be 3" within a few feet of hitting horizontal as well, but no use changing everything out. Eternal Plumber : Apr 21, 2008, 12:07 PM Originally Posted by atvingnc. Apparently there is concern that the P trap could wash out if water falls to far through a long vertical drain. @William Morrison, That is right, but a lot depends on local jurisdictions. As long as the attached trap arm that is running between the P-trap and vent pipe has a ¼” slope directed towards the drain, you are not constricted with how close the drain is to the P-trap itself. Gradients Foul water drainage systems are generally designed to run at a maximum of three Additionally, a shower that is only 6′ in height will be awkward. I can't see this happening, so I think you'll be fine. Min. Always consult with a licensed professional. If we stay to the left of the beam then the pipe will be too low, as we only have 8" drop to the bldg sewer in 1st flr ceiling. [ 1 Answers ] What is the maximum vertical fall distance between the shower drain and the 2 inch trap just below it? There is no minimum distance for how far below the drain a P-trap should be. I have the idea to install the trap perhaps 4 inches from the drain, but that would put the trap approximately 2 feet above the sewer line. We don't want to raise the shower floor. I discovered this shower drain that is european and is low profile. 8 Posts . The reason I asked about the distance from p trap to shower drain was to resolve the problem of a bad odor emanating from the drain. The shower is on 2nd story of a high rise condo building (below is an office space). The P-trap should be located no more than 24” below the drain. It's also possible to install an AAV in a riser connected at the point where the waste arm drops to the drain as long as the distance between the AAV and the trap doesn't exceed the maximum allowable for a conventional vent pipe, which is 6 feet for 1 1/2-inch pipe and 8 feet for 2-inch pipe. Looking up at the basement ceiling, it looks like the bathroom sink and the kitchen sink also drain into this line, and I know both those sinks have p-traps directly under them. If I keep it tight to the shower base bottom it may prevent me from cutting into our basement concrete slab, there would be approx. Reply. It's the first time I've ever done plumbing so it was a bit of a learning experience. It is collecting buildup (similar to the texture of a butterfinger candy bar) in the drain. And the installation instructions explain that 1-2 inches of the tailpiece actually extend into the p-trap inlet. Brian Master plumber. According to the International Residential Code, the maximum vertical distance between the sink drain and the entrance to the p-trap is 24 inches. Please be sure it is a vent not a drain or waste. The shower drain is supposed to be a minimum of 2" in size The trap must be placed a maximum distance of 8 feet from your vent. Minimum Distance. Actually this configuration is acceptable. Does P trap need to be below drain? Homeowners who install their P-traps too far away from the drain may experience more odors than what’s normal. An S trap would go through the floor. Similarly, why is an S trap illegal? For the purposes of drainage and ventilation requirements, a two- or three-compartment sink, up to three single sinks, or up to three lavatories may be connected to one “P” trap and considered as a single fixture, so long as the sinks and lavatories are in the same room, have waste outlets not more than 30 inches apart, and have flood level rims at the same level. The point in the wall where the pipes seemingly disappear, there is always a vent that will also travel up, eventually exiting the building via the vent stack on the roof. Any input would be appreciated. Her tub (1 1/2″) drains 3+ feet straight down to a 2″ galvanized 8″ deep seal P-trap right at the sanitary tee hub on the main stack. There is a maximum distance away from the drain laterally but nothing about it's elevation that I … It is important the the pipe is falling back to the waste or drain pipe. If the sink has a pop-up drain, the tailpipe will need to be long enough to house the drain mechanism. For 1 1/2-inch drain pipe, it's 3 1/2 feet and for 2-inch drains, it's 5 feet. In this regard, how far below drain should P trap be? See attached. The trap arm that connects horizontally from the vent pipe to the p-trap must have a slope of 1/4 inch per foot sloping up toward the drain. As long as the drain is below the bottom of the sink, it should drain. Consequently the drain hoses are quite narrow guage compared to 1.5" Polypipe. A P-trap is a plumbing device which prevents odorous gas in plumbing system, drains and sewers, from rising up through a toilet, sink or floor drain or any other drain into a home or business. Is there a maximum distance that is allowed between a p-trap for the sink (1 1/2" horizontal pipe) and the vent stack that it drains into (2" or 3" vertical pipe) ? distance between shower drain and ptrap rmusa (Mechanical) (OP) 24 Jul 16 18:25. This is very frustrating. The maximum distance of the toilet from the drain column depends on several variables: first, the features of the plumbing systems, but even the thickness of the screeds and the type of sewer (wall or floor drain). The maximum distance of this point from the P-trap depends on the diameter of the drain pipe. Note: you can see from this table that at common home drain pipe sizes, if your pipe is 2" or larger you're unlikely to run into drain capacity trouble. The drop from the shower to the trap is not so important within reason but there must be a minimum 1/4" slope from the trap to the vent and the vent outlet must be a minimum height above the flood level of the trap. If the distance is more than a couple of feet is it better to put in a separate vent / drain ? Locating Linear Drains A linear drain allows for the use of larger format floor tile and the ability to pitch the floor in one direction. I have been experiencing a issue with my shower drain in my new house (new but the warranty is over). speedball1 Posts: 29,301, Reputation: 1939. The table below details the maximum spacing of the access points as detailed in the above standard. This distance shows the maximum amount of vertical depth of liquid the P-trap will hold . Would I get a vacuum and thus draw the water from the trap. Plumbing Fittings: What is the minimum size P-Trap that must be used for a floor drain or floor sink? I installed drainage pipes to connect the drain on the new sink to the existing drainage pipe that goes into the wall (then goes outside). If you get to far the suction will pull the water out of the trap and let sewer gas in the house . Maximum vertical fall distance shower drain to p-trap below it. The drain is 2" . 6'' between floor and shower drain. Exception: The developed length of the fixture drain from the trap weir to the vent fitting for self-siphoning fixtures, such as water closets, shall not be limited. The purpose of a trap is to prevent sewer gases, and possibly vermin, from coming in to the home. distance below a shower base that the p-trap has to be placed? A P trap goes through the wall. Thanks. The reason the trap arm has a maximum distance to the drainage pipe relative to it’s size in diameter is because we don’t want any water to become non vented. For full guidance as to provision of access, reference should be made to BS EN 752. The distance between points should therefore not exceed 100m. The specs for the Kohler drain/overflow assembly I want show a total of 5 7/8" from the top of the drain shoe to the bottom of the included 3 inch tailpiece. Per codes, a trap has to be a minimum of 2 inches in-depth and a maximum of 4 inches. There is no minimum. Just remember, the longer the distance from the shower drain to the P-trap, the more your drains will stink your bathroom up. There is beam below. Break the concrete slab and drain it corectly $$$$ violate the code for either the p-trap or the min height from shower base to ceiling (6′-8″) in most places due to a lack of overall headroom. TABLE 909.1 MAXIMUM DISTANCE OF FIXTURE TRAP FROM VENT . Its not the acceleration of water that makes it overflow into the drain, the water itself seeks level. According to the International Residential Code, the maximum vertical distance between the sink drain and the entrance to the p-trap is 24 inches. :) Maximum distance from sink to p trap [ 5 Answers ] Hi, What should the maximum distance be from the bottom of the sink to the p trap. First, your P-trap should be located directly below the center of your shower and close to your shower drain. In general, the maximum distance of the toilet from the main drain should not exceed 4 meters, with a 2% minimum slope. The simple answer is if your trap from the fixture cannot see the vent then it is installed wrong. My question is can I run the drain horizontally (2 in) all the way inside of the house and then trap it and continue on from there or does the trap have to be close to the drain. Charl The minimum allowable clearance from the front of a fixture to an opposing wall is 21 inches, and the minimum distance from the center of any fixture to the wall on either side is 15 inches. Directional fitting required for the discharge of the disposer or dishwasher. This is due to condensation that forms in the pipe and it can flow back. That is just new codes. They are used for wall entry connections to the plumbing line and are assembled with compression style fittings. As long as the pipe has a reasonable and consistent "fall," what comes out of the machine will not be enough to exert any "back pressure" on an open ended pipe, which in any case would cause the water to overflow where the drain pipe enters the Polypipe. Can you install AP trap backwards? A riser off the trap into the sink is better off shorter than longer. Infinity Drain’s Site Sizeable (S) Series provides flexibility during the installation process by allowing the outlet to be placed anywhere along the channel run. It rotted out and I’m looking to replace it with a PVC solution. If it is just a vent from the wastes or drain there is no maximum distance. 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