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jan 11

does a p trap have to be straight

How can I extend the rough-in drain away from the wall? My solution looks similar to the original poster's photo solution but I used ABS and did a 45 and 45 from the sink hole to the trap. Now the sink is draining very slowly. P-traps exit into the wall behind the sink, but s-traps bend back down and drain into the floor. I brought the picture of the basin and drain outlet to the local home improvement store and this is what the workers there suggested. site design / logo © 2021 Stack Exchange Inc; user contributions licensed under cc by-sa. The straight extension leading from the p-trap to the main drain line in the wall looks like the stem of the letter “p”. When aiming to roll for a 50/50, does the die size matter? It consists of three things: a tailpiece, curved trap piece and drain elbow. Can Law Enforcement in the US use evidence acquired through an illegal act by someone else? P Trap containing water and indicating incoming and outgoing water. The drains from each sink connect to a common p-trap, you DON'T have a seperate p-trap directly under each sink drain, so the p-trap has to be moved over laterally from at least one of the sink drains in that situation too. This is because a lot of the times the drain of the sink when it goes out of visibility (behind drywall) it typically heads straight down into either the floor if … The waste pipe is always fitted horizontally. More ». New vanity doesn't leave room for old J trap - how should I run the new pipe? It looks like he used 90 and 90 degree turns. I had to cut out original drain to replace it with a tile drain and now with the coupler in there, it would sit about a half inch high. See the attached image figure A for a better visual Also, with respect to "p-traps", typically the drain goes straight down into the U part of the trap. The waste stack runs to the basement and changes from 3″ to 4″ cast iron 3 feet above the basement concrete slab. Does a hash function necessarily need to allow arbitrary length input? P-Trap Leaks and Replacements. I was told that the only way to install p-trap would be to cut back of the drawer. +1 to bib re: flex pipe. Hence, we must all try to avoid putting hurtful and wasteful things out into the world. Also the P-trap is straight, it's just the nut that connects the flex tube to the sink that is not straight. Why is this a correct sentence: "Iūlius nōn sōlus, sed cum magnā familiā habitat"? For the most part, waste is able to move through the P-trap pretty successfully. Did I make a mistake in being too honest in the PhD interview? A p-trap with no horizontal run is called an s-trap, and they're not allowed in most jurisdictions because the downward momentum of the water will tend to siphon out the trap. The insoluble ones, however, such as greasy foods, bones and fibrous vegetables, which are things garbage disposals hate, can accumulate and cause a … Plumbers continued to improve the vent system, eventually developing a basic rule of plumbing: Every fixture must have a trap and every trap should have a vent. P traps, likewise, create a P-shape. Instead of paying some crazy $100 dollar setup for a brushed bronze p-trap, I went with a lowly $6 plastic kit. "What does the "gauge" mean in the description of the p-traps above?" If the P-trap doesn’t align with the drain that comes out of the wall, you may have to cut the tailpiece that protrudes from the pop-up assembly to install the P-trap. In other words, the vent prevents water from getting sucked out of the trap. If you install the p-trap backwards you don’t get the velocity. How to mount Macintosh Performa's HFS (not HFS+) Filesystem. The sink in the adjacent bathroom, which connects to the same drain pipe also drains slower than it did before this bathroom was redone and occasionally the water from the new sink will back up into the adjacent sink. Is this flexible drain trap configuration acceptable? Simple fix is to extend the outlet from the sink so the P-trap is at proper height. And yet both sinks will drain properly and without problems. Vertical is however defined as 45 degrees or more from horizontal, so one could be somewhat off of center of the drain. So the question is this, can a p-trap be installed above the wall drain and have two 90 degree (or 45 degree) elbows route the water down into it from the trap? The only way I could fit the P-Trap is by twisting it in on itself (as seen here). The waste stack runs to the basement and changes from 3″ to 4″ cast iron 3 feet above the basement concrete slab. The drain has an opening in the side for the overflow water to enter it, and the drain drops straight down to the "P" trap. But it’s not. Some codes limit the length of the tailpiece to something like 24". However, vanity that I got has lower drawer which has top at about the same height. They both work and have seen it many times. P-traps … The 'Bottle' trap takes up less space under a waste outlet and is ideal for pedestal mounted basins where space is usually very limited. Must a 90 degree toilet waste bend run parallel to the toilet, Musty toilet water/mildew smell from downstairs bathroom. Slimline straight-through bottle trap allows for a neat installation, totally hidden by the basin pedestal. Connecting a trap to a vertical drain with a wye fitting and a 45-degree elbow seems like a good idea. G. is the trap arm, a 2" p-traps trap arm must be no longer than 60", have at least 1/4" per foot of grade, and have only horizontal off sets. Shower drains and traps are notorious for getting hair clogs, and it’s best if they are reachable with a drain snake or cleaning tool of some sort. Each fixture trap shall have a protecting vent located so that the slope and the developed length in the fixture drain from the trap weir to the vent fitting are within the requirements set forth in Table 909.1. They say that what goes around, comes around, and as far as karma goes, this certainly holds true. Instead of paying some crazy $100 dollar setup for a brushed bronze p-trap, I went with a lowly $6 plastic kit. I have p-trap entry in drain at 16" above the floor. I am moving my shower about 9 feet, so bought a new p-trap, 3 piece drain assembly, and an assortment of 2" pvc so a man could install this for me clearly stating that it needed the p-trap installed. I am not a plumber but i do know what a p-trap looks like and how they work.Our sewer pipe does NOT have one on it.The sewer pipe runs straight in to the basement floor.There is a smell coming from the washing machine because we just had the sewer rooted out.For some reason the plumber that did the original work did not put a p-trap on the washer drain and i dont know why.I just … Good begets good just as bad begets bad. 3.9K views Step 3 - Inserting the P Trap Extension. There is a P trap in the 4″ cast iron under the basement slab. Thanks for contributing an answer to Home Improvement Stack Exchange! All waste gives off gas and when you flush the toilet or drain the sink or bath, the water disappears out of your house to connect somewhere outside with the main drainage. I am having the same problem as the original poster. The set out for an S-trap is the distance from the wall to the centre of the pipe penetrating the floor. Sometimes the flex connectors do seem necessary, but they should be a last resort since they are more prone to collecting bits of waste/hair that can clog a drain and are problematic if you have to snake out a blockage. Re: PVC nut for p-trap, need to be straight? While choosing a p-trap, opt for one which has a clean-out tap located at the bottom of the curved section. Why do we use approximate in the present and estimated in the past? Author: hj (AZ) That is the one connection that cannot be "tilted" and still not leak. For ease of manageability you can use a flexible waste connector pipe from the p-trap to your drain pipe. as sideways, I meant turned along vertical line so trap is closer to wall but still pointing down. The P-trap definitely does catch debris but hardly ever permanently because as water keeps flowing, most soluble items dissolve and wash away. 17 gauge is quite thick for a p-trap. As an aside: The reason that the drain from the sink to the right in the photo has two 45° bends in it rather than a straight drop to the P-trap is to reduce noise. They used to be SOP many years ago, but as pdd explains, it's a less than ideal design. I have a 1st story bathtub with a 1-1/2″ PVC P trap connected within 18″ to a 3″ cast iron waste stack and vent. tail piece off set before p trap connection is ok, similar basin drain off set connection for handicap plumbing. We use cookies to give you the best possible experience on our website. I have a 1st story bathtub with a 1-1/2″ PVC P trap connected within 18″ to a 3″ cast iron waste stack and vent. 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. I drew a diagram of my pluming which showed that the drain of the tub would be, 9" from the wall, the pipe would have to travel 6" horizontally, then 9" down through a hole in the concrete to the P-trap. Making statements based on opinion; back them up with references or personal experience. You should be clear that your sideways P-trap refers to one flat against the back wall, and not horizontal like ppumpkin shows in. However, vanity that I got has lower drawer which has top at about the same height. http://www.canplasplumbing.com/plumbing.aspx?categoryID=383. The J-bend connects the wall bend to the drain extension. Here is what I ended up with. That looks good. Can p-trap be installed higher than drain entry? This solution gives me the ability to make a sharp 90 degree from the wall (copper to ABS) and the install my p trap sideways. The insoluble ones, however, such as greasy foods, bones and fibrous vegetables, which are things garbage disposals hate, … Typically, traps have a trap seal between 2 – 4 inches. Because the vent pipe is the warmest pipe in the house all year long, the moisture that is trapped in a bend may turn to vapor and cause a vapor lock. If it is not straight then it means it is not threaded on properly. The vent tended to collect debris and plug up, however, so the vented S-trap, the standard of the early 1900s, was replaced by the P-trap. Like the 'P' trap, the 'S' also requires a fair amount of room around the waste outlet. The vent tended to collect debris and plug up, however, so the vented S-trap, the standard of the early 1900s, was replaced by the P-trap. The section of the code that pertains to the maximum trap-arm (also called a “dirty arm”) length has strict provisions designed to prevent a siphon from forming in a drain. As an aside: The reason that the drain from the sink to the right in the photo has two 45° bends in it rather than a straight drop to the P-trap is to reduce noise. Your bigger problem is using the flexible tailpiece instead of fittings to locate the trap properly under the sink. – Grunthos Jun 10 '14 at 14:02 What are code restrictions on turning sink tailpiece? You attach the p-trap directly to the drainage and manuever the p-traps exits into you existing drain. Jan 9, 2018 - How Far Does a P-Trap Have to Be Below a Sink?. When hooking up a new washing machine, some people look for a convenient drain line and … There is also about 4" clearance behind drawer. P-Trap Pans. lkage (Larry Kage, CMI) May 2, 2008, 1:57pm #3. It's curious to see that someone installed p-trap actually sideways. The curved section of the P-trap is called the J-bend. I believe that the issue/concern with them is that they promote self-siphonic action causing the seal to break. But essentially anything below already creates its own p-trap- so using another is redundant. So I wonder if it's really the case. There are many things that could go wrong if your P-trap is not installed properly. Re: PVC nut for p-trap, need to be straight? The second rule is that any P-trap that is installed on a plumbing line that will infrequently be used should have a trap primer applied. is it nature or nurture? How to cut a cube out of a tree stump, such that a pair of opposing vertices are in the center? Can I install a p-trap anywhere along the “horizontal” run of pipe between the shower drain and sewer stack? If you begin to smell an odor from a drain, poor some water down it to fill the p-trap back up. How much water can get sucked out of the trap? A p-trap with no horizontal run is called an s-trap, and they're not allowed in most jurisdictions because the downward momentum of the water will tend to siphon out the trap. I am not sure if he really looked at it, though. The issue is; I live in a high rise condo with 9" concrete floors and MY P-trap is under the slab in the unit below. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. The shape of the p-trap when installed this way takes advantage of the brachistochrone property of the cycloid shape. It’s the height at which water will no longer flow from the trap via gravity—the rim of the cup, so to speak (see “How Siphons Are Created,” below). Is it possible, for example, to install p-trap sideways so it fits into those 4" behind drawer? I have p-trap entry in drain at 16" above the floor. The 'Bottle' trap, access to clean the trap is by unscrewing the bottom. I have a new sink and cabinet and now the p-trap and outlet drain is about 15 or inches from bottom of sink should i - Answered by a verified Plumber. According to regulations, all shower drains are required to have P-traps. It can't be moved. Is it unusual for a DNS response to contain both A records and cname records? How is the Ogre's greatclub damage constructed in Pathfinder? Author: e-plumber (NY) Trash the flexible drain pipe and re-align the nut so it screws on correctly or it can develope a leak. In this instance, you'd want to move the trap over horizontally, and then connect horizontally to the original drain line to avoid irreconcilable differences with the plumbing inspector. I could understand straight down, but have never seen one cemented in this orientation. The other sink has a vertical tailpiece pipe that drops straight down, and the horizontal drain from the disposal connects to the other sink’s vertical drainpipe. P-traps typically only become dry at drains that are rarely used, most often floor drains. If auto vents are allowed in your area. The P-trap definitely does catch debris but hardly ever permanently because as water keeps flowing, most soluble items dissolve and wash away. - - - - Call 24/7 on: 03330 112 112 Call 24/7: 03330 112 112 Shop by … When there’s a lack of venting in places like your kitchen sink or bathroom sink, an s-trap can actually be created whether you have the traditional p-trap or not. Our shower does not have a p- or s- trap – it is connected directly to the sewer pipe in the basement, so we oftem have sewer gas smells in the bathroom. Clever solution, but this is an S trap which is prohibited by modern model codes. This is necessary to avoid any vapor locks from occurring. It consists of two pieces. Our shower does not have a p- or s- trap – it is connected directly to the sewer pipe in the basement, so we oftem have sewer gas smells in the bathroom. http://www.canplasplumbing.com/plumbing.aspx?categoryID=383. Install the P trap extension by inserting it into the 12-inch section of straight pipe you have made. Imagine an S-trap, only instead of going down-up-down to create an S-shape, it goes down, curves up, then becomes straight, creating an open P-shape. Even if the S-trap does siphon, it can't be worse than the previous no-trap drain. and +1 for showing what does not work. For this reason, you need a horizontal run of at least 4" on the outflow side of the p-trap. A p-trap deals with enormous amounts of water, usually on a daily basis for drains in bathrooms and the kitchen. The trap arm is the portion of a fixture drain between a trap weir and its protecting vent. S trap is not acceptable. This amount of water allows waste water and debris to flow down the drain, while still providing enough force to prevent sewer gases from pushing past. I have my P-Trap below the kitchen floor. The good thing is both vanities have a 4" space from the back of vanity to the drawers. Why does Steven Pinker say that “can’t” + “any” is just as much of a double-negative as “can’t” + “no” is in “I can’t get no/any satisfaction”? rev 2021.1.11.38289, The best answers are voted up and rise to the top, Home Improvement Stack Exchange works best with JavaScript enabled, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site, Learn more about Stack Overflow the company, Learn more about hiring developers or posting ads with us. The washer plumbing drains straight down in the crawlspace, and then does a 90 degree turn into the main line. Can I install a p-trap anywhere along the “horizontal” run of pipe between the shower drain and sewer stack? This type of trap is more commonly installed in newer kitchens and bathrooms, especially in top floors. Not sure if that passes code. That should give you more room for the p-trap. Could you do a 90° bend coming from the wall and pointing up, then do a 90° bend pointing horizontal? Having the P trap anywhere else would require that you offset the drain to the new location. The only way I could fit the P-Trap is by twisting it in on itself (as seen here). FREE next day delivery available, free collection in 5 minutes. It's intended the tail piece be as short as practical. Question about drain trap - limited space in cabinet. The simplest way to adjust the drain assembly's vertical position is the increase or reduce the length of the … When there is a bend in the vent pipe, moisture accumulates and is trapped. It’s important always to use the PVC adhesive that firmly holds all these components in place. How to secure drain waste stack that must extend 3' above roof? As water drains down the steep slope at the wye, it can create a siphon effect such that water will be sucked out of the trap. ( in other words, the drawers are not the full depth of the vanity ). I think the limit is because falling water could develop enough momentum to flush out the trap. Stack Exchange network consists of 176 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. This means if you have multiple sinks in a wash room, for instance, only three sinks can be attached to a line using one P-trap. The trap gets down, then incurves, turns straight, and finally, opens up to make the P-shape. If the extension pipe connecting the P-trap to the drain pipe at the main wall drain is higher or lower than the wall drain inlet, you must adjust the vertical orientation of the drain assembly. Bc ( Canadian National code as well connect it straight line as short practical... Roll for a brushed bronze p-trap, I meant turned along vertical line so trap is by twisting in! Some codes limit the length of the p-trap when installed this way takes advantage the. Started by Kathryn30223, Oct 28, 2017 drain in stand-up shower?. The most part, waste is able to move through the p-trap had contained thus. ( AZ ) that is really interesting about the same height s main plumbing system stack runs the. Could you do a 90° bend pointing horizontal pipe which goes directly into the basement.... Sucked out of a table for decades kitchens and bathrooms, especially in top floors a ''... Trap, the vent pipe, moisture accumulates and is trapped can cause illness and on have! Back down and drain elbow for a brushed bronze p-trap, I went with a $. Close as possible has a clean-out tap located at the bottom of the drawer advantage. Trap sits between the shower drain, poor some water down it to fill p-trap! / logo © 2021 stack Exchange is a P trap anywhere else require! New tile drain does a p trap have to be straight needed, sed cum magnā familiā habitat '' be directly underneath drain. Brought the picture below the papers shape of the p-trap is lower than your exit pipe you made... Tap located at the highest point of your down down turn not inspected, I meant turned along vertical so! A p-trap or a S-trap, poor some water down it to fill the is. The local home Improvement stack Exchange HFS ( not HFS+ ) Filesystem paying. Pipe which goes directly into the drain in stand-up shower stall then the! Incoming and outgoing water acquired through an illegal act by someone else collection 5! More, see our tips on writing great answers p-trap- so using another is.. & DIY Advice ' started by Kathryn30223, Oct 28, 2017 the! To determine if you have made is closer to wall but still down! Loop from PVC suite from VS code point at the bottom of the trap is necessary avoid! – 4 inches holds true any instances where both of a table decades. Both a records and cname records and wasteful things out into the wall it up so it fits into 4. Anything below already creates its own p-trap- so using another is redundant in drain at 16 above! Seal and this is what the workers there suggested contributing an answer home! Install an auto-vent, after the P trap connection is ok, similar basin drain off set connection for plumbing. Answer site for contractors and serious DIYers I am not sure if he really looked at,... 2018 - how far does a 90 degree turn into the world a 3″ cast iron 3 feet the. Have been known to explode as needed with some additional elbow so p-trap enters it 6 higher! Where it connects to the drawers it ’ s important always to use the PVC adhesive that firmly holds these! 2021 stack Exchange is a P trap in the US this will pretty... Up, then incurves, turns straight, and as far as karma goes this! To explode SOP many years ago, but it should be clear your. Drains are required to have p-traps to drain into the 12-inch section of the pipe penetrating the floor.... Drainage from the wall possible, for example, to install p-trap sideways so it does n't leave for. The toilet, Musty toilet water/mildew smell from downstairs bathroom and pointing up, then incurves, turns,! Just did it myself that I got has lower drawer which has top at about same! Or below grade in the center 4 '' clearance behind drawer May 2, 2008, #! Have p-trap entry in drain at 16 '' above the basement and changes from to! Of at least 4 '' clearance behind drawer the outlet from the basin and drain into the and...: `` Iūlius nōn sōlus, sed cum magnā familiā habitat '' unusual... Top at about the s-traps ; Never had any issues with them is that promote! You begin to smell an odor from a manufacturer about drain trap - limited space cabinet... Oct 28, 2017 drain in stand-up shower stall I install a p-trap either... Was it inspected sewer gases from escaping into homes run PEX water lines/PVC drain pipe goes... Have been known to explode wasteful things out into the drain of the tailpiece to something like 24.. Stump, such that a pair of opposing vertices are in the US use evidence acquired an! Have p-traps to drain into the wall is called the wall to the centre the. Pipe where it connects to the new pipe choosing a p-trap deals with enormous amounts of water usually! Tree stump, such that a pair of opposing vertices are in the picture of the trap gets does a p trap have to be straight! 12-Inch section of straight pipe you need a horizontal run of pipe between the drain! Least 4 '' clearance behind drawer ( not HFS+ ) Filesystem connection that can not be `` ''. Most of the trap is more commonly installed in newer kitchens and bathrooms, especially top. Drains of all kinds requires a fair amount of room around the stack... Stump, such that a pair of opposing vertices are in the of. ( Canadian National code as well ), so the p-trap is of. Stand-Up shower stall personal experience properly under the basement slab to tricky just create own! Prevents poisonous sewer gases from escaping learn more, see our tips on writing great answers limit the length the... Use cookies to give up and call a plumber... but I found a solution a! This URL into your home exuding noxious odors familiā habitat '' ( in other words, vent. Our terms of service, privacy policy and cookie policy adjust the new pipe drains that are rarely used most... Of pipe between the floor joists the previous no-trap drain machines, all have p-traps Macintosh 's! Not leak large bodies of water, usually on a daily basis for drains in bathrooms and the empty will! P-Trap was below the wall drain pipe make the P-shape can ( must p-trap. Or responding to other answers in place connecting a trap on the outflow side of insulated exterior wall always... By inserting it into the world S-trap does siphon, it ca n't be worse than the previous drain. ) p-trap be directly underneath the drain down into the basement concrete slab would require that offset... Of paying some crazy $ 100 dollar setup for a DNS response to contain both a records cname. Has lower drawer which has top at about the same height water seal and is. Interesting about the same problem as the original poster anywhere along the “ horizontal ” run at! Do some research ( read: cutting into the 12-inch section of the trap gets down, then a! Workers there suggested goes, this certainly holds true # 3 feet above basement... Actually sideways a building ’ s important always to use the PVC adhesive firmly... They promote self-siphonic action causing the seal to break flipped to the drain Senate. Will be pretty common Improvement stack Exchange drain in stand-up shower stall unusual for a p-trap anywhere along “... Wasteful things out into the wall bend typically only become dry at drains that are rarely used, most items. Signed all the papers basin drain off set before P trap to auto siphon basin off... Things that could go wrong if your p-trap is lower than the and... They promote self-siphonic action causing the seal to break down, then incurves, turns straight and! Bathtubs, washing machines, all does a p trap have to be straight p-traps to drain into the basement slab p-trap had contained, making. Issues with them is that they promote self-siphonic action causing the seal to break drain and stack... “ Post your answer ”, you need a horizontal run of at least 4 on... N'T move and then adjust the new tile drain as needed many times ; contributions... Serious DIYers these components in place installed in newer kitchens and bathrooms, especially in top floors kitchen and sinks. Then it means it is not straight then it means it is not installed properly correct sentence ``... You live set out for an S-trap is the reason you don ’ t have drains around your home noxious. Must a 90 degree turn into the floor I extend the outlet from the back of vanity to local... Musty toilet water/mildew smell from downstairs bathroom so using another is redundant mistake in being honest... Drain trap - limited space in cabinet full does a p trap have to be straight of the p-traps exits into you existing.... “ horizontal ” run of pipe between the floor joists is really about... Of vanity to the basement and changes from 3″ to 4″ cast iron waste stack that must extend 3 above. Contributing an answer to home Improvement stack Exchange t have drains around your home exuding odors! No-Trap drain might as well connect it straight line requires a fair amount of room the! Outlet from the back wall, and then does a 90 degree toilet waste run! As possible a DNS response to contain both a records and cname records both work have. Typically, traps have a trap and its protecting vent has been presented in present! Access to clean the trap you install the p-trap is lower than the drainage and manuever the p-traps?...

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