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. A riser off the trap into the sink is better off shorter than longer. The drain is 2" . 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. If it is just a vent from the wastes or drain there is no maximum distance. That is just new codes. According to the International Residential Code, the maximum vertical distance between the sink drain and the entrance to the p-trap is 24 inches. In general, the maximum distance of the toilet from the main drain should not exceed 4 meters, with a 2% minimum slope. 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. According to the International Residential Code, the maximum vertical distance between the sink drain and the entrance to the p-trap is 24 inches. 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. Additionally, a shower that is only 6′ in height will be awkward. 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. If you set two fixtures side by side, the minimum distance between their centers is 30 inches. 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. First, your P-trap should be located directly below the center of your shower and close to your shower drain. 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. I have been experiencing a issue with my shower drain in my new house (new but the warranty is over). 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. 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. 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. That is exactly what he needs. 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. Does P trap need to be below drain? Plumbing Fittings: What is the minimum size P-Trap that must be used for a floor drain or floor sink? 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. Charl The P-trap should be located no more than 24” below the drain. I can't see this happening, so I think you'll be fine. This is due to condensation that forms in the pipe and it can flow back. P-Traps come in several styles, including one-piece and two-piece designs. (i.e. :) 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. [ 1 Answers ] What is the maximum vertical fall distance between the shower drain and the 2 inch trap just below it? This is very frustrating. Its not the acceleration of water that makes it overflow into the drain, the water itself seeks level. The maximum distance of this point from the P-trap depends on the diameter of the drain pipe. Minimum Distance. This distance shows the maximum amount of vertical depth of liquid the P-trap will hold . We don't want to raise the shower floor. The purpose of a trap is to prevent sewer gases, and possibly vermin, from coming in to the home. 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. 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. The simple answer is if your trap from the fixture cannot see the vent then it is installed wrong. distance between shower drain and ptrap rmusa (Mechanical) (OP) 24 Jul 16 18:25. 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? It rotted out and I’m looking to replace it with a PVC solution. It is collecting buildup (similar to the texture of a butterfinger candy bar) in the drain. TABLE 909.1 MAXIMUM DISTANCE OF FIXTURE TRAP FROM VENT . Please be sure it is a vent not a drain or waste. distance below a shower base that the p-trap has to be placed? Homeowners who install their P-traps too far away from the drain may experience more odors than what’s normal. 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). 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. Discussion Starter • #1 • Nov 8, 2010. Eternal Plumber : Apr 21, 2008, 12:07 PM Originally Posted by atvingnc. 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. 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. Gradients Foul water drainage systems are generally designed to run at a maximum of three Would I get a vacuum and thus draw the water from the trap. Any input would be appreciated. I discovered this shower drain that is european and is low profile. Any thing over 2 ft, per code, a trap could lose its seals. There is a maximum distance away from the drain laterally but nothing about it's elevation that I … 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. If the sink has a pop-up drain, the tailpipe will need to be long enough to house the drain mechanism. And the installation instructions explain that 1-2 inches of the tailpiece actually extend into the p-trap inlet. speedball1 Posts: 29,301, Reputation: 1939. The minimum is sort of dictated by the size of the pipes and trap fittings. For 1 1/2-inch drain pipe, it's 3 1/2 feet and for 2-inch drains, it's 5 feet. Maximum vertical fall distance shower drain to p-trap below it. 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. If the distance is more than a couple of feet is it better to put in a separate vent / drain ? There is beam below. Fall To P-Trap; Author: Anonymous User Is there a min. There is no minimum distance for how far below the drain a P-trap should be. @William Morrison, That is right, but a lot depends on local jurisdictions. Per codes, a trap has to be a minimum of 2 inches in-depth and a maximum of 4 inches. Consequently the drain hoses are quite narrow guage compared to 1.5" Polypipe. 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. Brian Master plumber. 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. If you get to far the suction will pull the water out of the trap and let sewer gas in the house . Just remember, the longer the distance from the shower drain to the P-trap, the more your drains will stink your bathroom up. 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. They are used for wall entry connections to the plumbing line and are assembled with compression style fittings. 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. 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. The shower is on 2nd story of a high rise condo building (below is an office space). The table below details the maximum spacing of the access points as detailed in the above standard. Min. 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 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). Table 2. For full guidance as to provision of access, reference should be made to BS EN 752. 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) ? Thanks. Actually this configuration is acceptable. Similarly, why is an S trap illegal? As long as the drain is below the bottom of the sink, it should drain. 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. An S trap would go through the floor. Apparently there is concern that the P trap could wash out if water falls to far through a long vertical drain. Basic math tells me that the bottom of the tub would only need to be about 4-5 inches higher than the inlet. See attached. 8 Posts . A P trap goes through the wall. It is important the the pipe is falling back to the waste or drain pipe. It's the first time I've ever done plumbing so it was a bit of a learning experience. Some codes show 2 ft for 1-1/2 pipe but people fudge on that some with no problem . In this regard, how far below drain should P trap be? 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