Maximum vertical fall distance shower drain to p-trap below it. 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. Per codes, a trap has to be a minimum of 2 inches in-depth and a maximum of 4 inches. distance below a shower base that the p-trap has to be placed? 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 . Brian Master plumber. Any thing over 2 ft, per code, a trap could lose its seals. 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. Always consult with a licensed professional. If it is just a vent from the wastes or drain there is no maximum distance. Gradients Foul water drainage systems are generally designed to run at a maximum of three 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. 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. It's the first time I've ever done plumbing so it was a bit of a learning experience. This is due to condensation that forms in the pipe and it can flow back. Minimum Distance. The maximum distance of this point from the P-trap depends on the diameter of the drain pipe. This distance shows the maximum amount of vertical depth of liquid the P-trap will hold . According to the International Residential Code, the maximum vertical distance between the sink drain and the entrance to the p-trap is 24 inches. An S trap would go through the floor. A riser off the trap into the sink is better off shorter than longer. distance between shower drain and ptrap rmusa (Mechanical) (OP) 24 Jul 16 18:25. Eternal Plumber : Apr 21, 2008, 12:07 PM Originally Posted by atvingnc. There is no minimum. Can you install AP trap backwards? Please be sure it is a vent not a drain or waste. The purpose of a trap is to prevent sewer gases, and possibly vermin, from coming in to the home. 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. 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. Charl For 1 1/2-inch drain pipe, it's 3 1/2 feet and for 2-inch drains, it's 5 feet. Apparently there is concern that the P trap could wash out if water falls to far through a long vertical drain. 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. We don't want to raise the shower floor. Table 2. Would I get a vacuum and thus draw the water from the trap. In general, the maximum distance of the toilet from the main drain should not exceed 4 meters, with a 2% minimum slope. I can't see this happening, so I think you'll be fine. Fall To P-Trap; Author: Anonymous User Is there a min. There is beam below. 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) ? 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. The shower is on 2nd story of a high rise condo building (below is an office space). I have been experiencing a issue with my shower drain in my new house (new but the warranty is over). @William Morrison, That is right, but a lot depends on local jurisdictions. 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. 6'' between floor and shower drain. 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. 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. For full guidance as to provision of access, reference should be made to BS EN 752. As long as the drain is below the bottom of the sink, it should drain. 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. A P trap goes through the wall. 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. Homeowners who install their P-traps too far away from the drain may experience more odors than what’s normal. It rotted out and I’m looking to replace it with a PVC solution. The drain is 2" . 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. If the distance is more than a couple of feet is it better to put in a separate vent / drain ? 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. And the installation instructions explain that 1-2 inches of the tailpiece actually extend into the p-trap inlet. 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. 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. Directional fitting required for the discharge of the disposer or dishwasher. 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. 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. See attached. The minimum is sort of dictated by the size of the pipes and trap fittings. 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. 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. There is a maximum distance away from the drain laterally but nothing about it's elevation that I … That is exactly what he needs. The distance between points should therefore not exceed 100m. speedball1 Posts: 29,301, Reputation: 1939. 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). In this regard, how far below drain should P trap be? This is very frustrating. 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. 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. :) 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. 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. 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. Some codes show 2 ft for 1-1/2 pipe but people fudge on that some with no problem . They are used for wall entry connections to the plumbing line and are assembled with compression style fittings. The table below details the maximum spacing of the access points as detailed in the above standard. I discovered this shower drain that is european and is low profile. If the sink has a pop-up drain, the tailpipe will need to be long enough to house the drain mechanism. Consequently the drain hoses are quite narrow guage compared to 1.5" Polypipe. According to the International Residential Code, the maximum vertical distance between the sink drain and the entrance to the p-trap is 24 inches. If you set two fixtures side by side, the minimum distance between their centers is 30 inches. Any input would be appreciated. Additionally, a shower that is only 6′ in height will be awkward. Thanks. Min. Discussion Starter • #1 • Nov 8, 2010. First, your P-trap should be located directly below the center of your shower and close to your shower drain. [ 1 Answers ] What is the maximum vertical fall distance between the shower drain and the 2 inch trap just below it? That is just new codes. 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. Similarly, why is an S trap illegal? Does P trap need to be below drain? Actually this configuration is acceptable. The simple answer is if your trap from the fixture cannot see the vent then it is installed wrong. The P-trap should be located no more than 24” below the drain. 8 Posts . It is collecting buildup (similar to the texture of a butterfinger candy bar) in the drain. 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. There is no minimum distance for how far below the drain a P-trap should be. (i.e. P-Traps come in several styles, including one-piece and two-piece designs. Its not the acceleration of water that makes it overflow into the drain, the water itself seeks level. Reply. Plumbing Fittings: What is the minimum size P-Trap that must be used for a floor drain or floor sink? It is important the the pipe is falling back to the waste or drain pipe. Fixture to P Trap Horizontal Distance; Author: bootlogic100 (IL) What I have is a room underneath my garage (new construction) and am going to have a drain in the concrete garage floor. 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