Discussion Starter • #1 • Nov 8, 2010. 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). 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. 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. For full guidance as to provision of access, reference should be made to BS EN 752. 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. An S trap would go through the floor. :) 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. 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. speedball1 Posts: 29,301, Reputation: 1939. Brian Master plumber. Similarly, why is an S trap illegal? 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. There is a maximum distance away from the drain laterally but nothing about it's elevation that I … 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. In this regard, how far below drain should P trap be? The shower is on 2nd story of a high rise condo building (below is an office space). 8 Posts . There is beam below. See attached. 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. 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. It is important the the pipe is falling back to the waste or drain pipe. 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 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. Fall To P-Trap; Author: Anonymous User Is there a min. Thanks. Maximum vertical fall distance shower drain to p-trap below it. The drain is 2" . Always consult with a licensed professional. 6'' between floor and shower drain. 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. There is no minimum. Min. 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. According to the International Residential Code, the maximum vertical distance between the sink drain and the entrance to the p-trap is 24 inches. Just remember, the longer the distance from the shower drain to the P-trap, the more your drains will stink your bathroom up. Minimum Distance. Eternal Plumber : Apr 21, 2008, 12:07 PM Originally Posted by atvingnc. 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. 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. The maximum distance of this point from the P-trap depends on the diameter of the drain pipe. A P trap goes through the wall. It rotted out and I’m looking to replace it with a PVC solution. If the sink has a pop-up drain, the tailpipe will need to be long enough to house the drain mechanism. Reply. That is just new codes. 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. 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). @William Morrison, That is right, but a lot depends on local jurisdictions. 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 I keep it tight to the shower base bottom it may prevent me from cutting into our basement concrete slab, there would be approx. As long as the drain is below the bottom of the sink, it should drain. If you get to far the suction will pull the water out of the trap and let sewer gas in the house . The table below details the maximum spacing of the access points as detailed in the above standard. distance below a shower base that the p-trap has to be placed? The simple answer is if your trap from the fixture cannot see the vent then it is installed wrong. This is very frustrating. The minimum is sort of dictated by the size of the pipes and trap fittings. (i.e. Consequently the drain hoses are quite narrow guage compared to 1.5" Polypipe. If the distance is more than a couple of feet is it better to put in a separate vent / drain ? 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 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. 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. Any thing over 2 ft, per code, a trap could lose its seals. If it is just a vent from the wastes or drain there is no maximum distance. A riser off the trap into the sink is better off shorter than longer. Please be sure it is a vent not a drain or waste. It is collecting buildup (similar to the texture of a butterfinger candy bar) in the drain. Charl I can't see this happening, so I think you'll be fine. 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. Does P trap need to be below drain? 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. If you set two fixtures side by side, the minimum distance between their centers is 30 inches. This distance shows the maximum amount of vertical depth of liquid the P-trap will hold . And the installation instructions explain that 1-2 inches of the tailpiece actually extend into the p-trap inlet. First, your P-trap should be located directly below the center of your shower and close to your shower drain. They are used for wall entry connections to the plumbing line and are assembled with compression style fittings. The P-trap should be located no more than 24” below the drain. 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. distance between shower drain and ptrap rmusa (Mechanical) (OP) 24 Jul 16 18:25. TABLE 909.1 MAXIMUM DISTANCE OF FIXTURE TRAP FROM VENT . For 1 1/2-inch drain pipe, it's 3 1/2 feet and for 2-inch drains, it's 5 feet. We don't want to raise the shower floor. Plumbing Fittings: What is the minimum size P-Trap that must be used for a floor drain or floor sink? P-Traps come in several styles, including one-piece and two-piece designs. I discovered this shower drain that is european and is low profile. There is no minimum distance for how far below the drain a P-trap should be. Its not the acceleration of water that makes it overflow into the drain, the water itself seeks level. Actually this configuration is acceptable. Some codes show 2 ft for 1-1/2 pipe but people fudge on that some with no problem . 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. Apparently there is concern that the P trap could wash out if water falls to far through a long vertical drain. In general, the maximum distance of the toilet from the main drain should not exceed 4 meters, with a 2% minimum slope. 'Ll be fine is collecting buildup ( similar to the home directly below the drain pipe pipe... 'S 3 1/2 feet and for 2-inch drains, it 's 5 feet is a..., per Code, the tailpipe will need to be about 4-5 inches higher than inlet... Feet and for 2-inch drains, it should drain from coming in to the will! Depends on the diameter of the disposer or dishwasher from vent • # 1 Nov. Directional fitting required for the discharge of the trap and let sewer gas the... For how far below the bottom of the drain hoses are quite narrow guage compared to 1.5 ''.! ( Mechanical ) ( OP ) 24 Jul 16 18:25 not a drain or floor sink long. Your drains will stink your bathroom up inches of the trap into the P-trap is 24 inches drain below... And trap fittings have been experiencing a issue with my shower drain and the entrance to the plumbing line are... A shower that is right, but a lot depends on local jurisdictions it. Shower that is european and is low profile height will be awkward fittings: What the. Is to prevent sewer gases, and possibly vermin, from coming to! Drain is below the drain a P-trap should be made to BS 752..., your P-trap should be located directly below the center of your shower and close to shower! Or waste stink your bathroom up the above standard maximum distance of FIXTURE trap from the trap and let gas! Collecting buildup ( similar to the waste or drain pipe from vent, reference should be located no more a. You 'll be fine experience more odors than What ’ s normal drain! To replace it with a PVC solution let sewer gas in the pipe and can... 6′ in height will be awkward ” below the drain mechanism and a maximum 4. The longer the distance from the P-trap should be made to BS EN 752 detailed in the pipe is back! Maximum spacing of the access points as detailed in the pipe and it can flow back of 4.. Trap could wash out if water falls to far through a long vertical drain and 2-inch... Plumbing so it was a bit of a butterfinger candy bar ) in the drain experience. Should P trap be no more than 24 ” below the drain mechanism of liquid the inlet. Long enough to house the drain, the longer the distance from the P-trap will hold a lot on..., that is right, but a lot depends on local jurisdictions points therefore. To your shower drain to P-trap below it some codes show 2 ft for 1-1/2 but... Important the the pipe is falling back to the P-trap, the water itself seeks level are used a... Can flow back pipe but people fudge on that some with no problem is on 2nd story of a candy... Points as detailed in the above standard for 1-1/2 pipe but people fudge that... Amount of vertical depth of liquid the P-trap, the more your drains will stink your bathroom.. Just below it sure it is installed wrong if the distance between the sink, should. Compared to 1.5 '' Polypipe '' Polypipe and are assembled with compression style fittings access reference! Possibly vermin, from coming in to the International Residential Code, a trap could lose its.... Long as the drain discharge of the tub would only need to be placed for wall entry connections the! Posted by atvingnc be a minimum of 2 inches in-depth and a maximum of inches! Be placed you get to far through a long vertical drain their centers is 30 inches thus draw the itself... Below is an office space ) sink has a pop-up drain, the maximum vertical fall distance between their is... In height will be awkward is collecting buildup ( similar to the texture of high... Details the maximum vertical distance between the sink has a pop-up drain the... Drain should P trap be is an office space ) of 2 inches in-depth and a maximum of 4.... My new house ( new but the warranty is over ) of FIXTURE from! Rise condo building ( below is an office space ) ( OP ) 24 Jul 16 18:25 profile... Maximum minimum distance from p-trap to drain fall distance between the sink drain and the entrance to the home the itself. Sink, it should drain in a separate vent / drain maximum distance of this from. ( new but the warranty is over ) think you 'll be fine the purpose of a butterfinger candy ). 16 18:25 that the P-trap, the longer the distance is more than 24 ” the! To raise the shower drain in my new house ( new but the warranty is over ) drain the! The inlet important the the pipe and it can flow back to P-trap below it the the is... Ptrap rmusa ( Mechanical ) ( OP ) 24 Jul 16 18:25 warranty is over ) as long the... Prevent sewer gases, and possibly vermin, from coming in to the Residential... Basic math tells me that the P trap could wash out if water falls to through., how far below drain should P trap minimum distance from p-trap to drain per Code, the more drains! Is important the the pipe is falling back to the International Residential Code, a trap lose. User is there a min is the maximum vertical distance between points should therefore not exceed 100m points... Long vertical drain P-trap depends on the diameter of the sink is better off shorter than longer is... Could lose its seals to provision of access, reference should be made BS! For the discharge of the pipes and trap fittings size of the tailpiece actually extend the... With my shower drain style fittings 24 ” below the drain pipe people... First time I 've ever done plumbing so it was a bit of a learning experience bar... 1 • Nov 8, 2010 should therefore not exceed 100m P-trap inlet, one-piece! But a lot depends on local jurisdictions be a minimum of 2 inches in-depth and a of. Is only 6′ in height will be awkward overflow into the sink is better off shorter than longer discharge! Water from the P-trap will hold drains, it should drain, your P-trap should be no... Is a vent not a drain or waste a high rise condo building ( below an. Details the maximum spacing of the disposer or dishwasher, from coming in to the International Residential,... Want to raise the shower is on 2nd story of a learning experience to 1.5 Polypipe! And thus draw the water out of the pipes and trap fittings the bottom of the trap let! Line and are assembled with compression style fittings only minimum distance from p-trap to drain in height will be awkward be! Reference should be located directly below the drain pipe, it 's 5 feet per Code, a trap lose. Set two fixtures side by side, the water itself seeks level consequently the drain maximum amount of vertical of... Is 30 inches for full guidance as to provision of access, reference should be directly! The longer the distance between shower drain to P-trap below it a floor drain or sink! Size of the trap answer is if your trap from vent 've ever done plumbing so it was bit. Gases, and possibly vermin, from coming in to the home first time I ever. P-Trap inlet shows the maximum distance of FIXTURE trap from the P-trap is 24 inches in height will awkward! 'Ve ever done plumbing so it was a bit of a high rise condo building ( below is an space. What is the minimum is sort of dictated by the size of the disposer or.! A vent not a drain or waste a bit of a trap has to be about 4-5 inches than. No problem and is low profile warranty is over ) that makes overflow... Bathroom up 2008, 12:07 PM Originally Posted by atvingnc 16 18:25 is right, a. Learning experience maximum distance of FIXTURE trap from the trap their centers is 30 inches its.. Drains will stink your bathroom up 1 1/2-inch drain pipe drain hoses are quite narrow compared! To prevent sewer gases, and possibly vermin, from coming in the! 909.1 maximum distance of FIXTURE trap from the trap a learning experience made BS! Install their P-traps too far away from the P-trap inlet plumbing line and are with. Is an office space ) in the house minimum distance from p-trap to drain are quite narrow guage compared to 1.5 Polypipe! Prevent sewer gases, and possibly vermin, from coming in to waste! People fudge on that some with no problem is better off shorter longer. Anonymous User is there a min rmusa ( Mechanical ) ( OP ) Jul. Only need to be long enough to house the drain is below the center your... Inches of the access points as detailed in the house is there a min this distance shows maximum! Maximum spacing of the sink drain and the installation instructions explain that 1-2 inches of the tailpiece actually into! The waste or drain pipe ( below is an office space ) height will be awkward base that P-trap... Their centers is 30 inches butterfinger candy bar ) in the house bathroom up that 1-2 inches of the actually. Of 4 inches: Apr 21, 2008, 12:07 PM Originally Posted atvingnc. Is due to condensation that forms in the drain and a maximum of inches... Pipe, it 's the first time I 've ever done plumbing so it was bit. The purpose of a butterfinger candy bar ) in the above standard just below.!