does a p trap have to be straight

does a p trap have to be straight

By the grace of god the lost are lead by the blind, just be grateful that it works, Plumbing Forum, Professional & DIY Advice, (You must log in or sign up to reply here.). For this reason, you need a horizontal run of at least 4" on the outflow side of the p-trap. It would be impossible for the s portion of the trap to auto siphon. There is a P trap in the 4″ cast iron under the basement slab. lkage (Larry Kage, CMI) May 2, 2008, 1:57pm #3. Instead of paying some crazy $100 dollar setup for a brushed bronze p-trap, I went with a lowly $6 plastic kit. On a properly installed "P" trap, there is a vent at the same place the drain turns downwards, which breaks the siphon. 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? Kevin L. Bell: Hello to all that read this, I have a home built in 1961 and due to flood damage had to replace my bathroom vanity. The 'Bottle' trap, access to clean the trap is by unscrewing the bottom. Install the P trap extension by inserting it into the 12-inch section of straight pipe you have made. Having the P trap anywhere else would require that you offset the drain to the new location. Too funny! Various p-traps. Did I make a mistake in being too honest in the PhD interview? I could understand straight down, but have never seen one cemented in this orientation. 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. It consists of two pieces. The waste pipe is always fitted horizontally. Can I install a p-trap anywhere along the “horizontal” run of pipe between the shower drain and sewer stack? 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. It only takes a minute to sign up. Post Reply. The near vertical drop allows the waste water draining from the sink to enter the trap with a lot of speed so that the trap self scours. Can Law Enforcement in the US use evidence acquired through an illegal act by someone else? The old vanity did not have a bottom drawer, so the bottom of the p-trap was below the wall drain pipe. That looks good. It’s important always to use the PVC adhesive that firmly holds all these components in place. 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. Does a Washing Machine Need a Trap on the Drain Line?. 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. He failed to install the p-trap saying it would just make it … What are code restrictions on turning sink tailpiece? For this reason, you need a horizontal run of at least 4" on the outflow side of the p-trap. P-traps … I was about to give up and call a plumber...but I found a solution from a manufacturer. 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. Follow these steps to install the P-trap: Slide the short side of the P-trap onto the tailpiece that drops down from the sink drain. 17 gauge is quite thick for a p-trap. Some codes limit the length of the tailpiece to something like 24". 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. Can (must) P-trap be directly underneath the drain in stand-up shower stall? 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. For ease of manageability you can use a flexible waste connector pipe from the p-trap to your drain pipe. 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. Or do they make a shorter coupler? 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. Why do we use approximate in the present and estimated in the past? 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 … How to mount Macintosh Performa's HFS (not HFS+) Filesystem. You should be clear that your sideways P-trap refers to one flat against the back wall, and not horizontal like ppumpkin shows in. 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 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. More ». F. is the p-trap, a washing machine pipes p-trap must be installed above the floor, at least 6" above but not more than 18" above. When hooking up a new washing machine, some people look for a convenient drain line and … I brought the picture of the basin and drain outlet to the local home improvement store and this is what the workers there suggested. A p-trap can suffer damage due to age and from chemical reactions to … If it is not straight then it means it is not threaded on properly. This may be an option if everything is located appropriately. And yet both sinks will drain properly and without problems. I had a similar situation to you and ended up doing what you see in the picture below. This will be for your P trap. Even if the S-trap does siphon, it can't be worse than the previous no-trap drain. Your bigger problem is using the flexible tailpiece instead of fittings to locate the trap properly under the sink. 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. 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. The trap gets down, then incurves, turns straight, and finally, opens up to make the P-shape. This tap can help you remove clogs which the p-trap had contained, thus making maintenance easier. a p trap can be twisted into lots of shapes; it doesn't have to run in a straight plane.... just saying this in case it is not clear... 2. then , even with a full size trap (which can take on any shape), the plumber has the option under Code to run the sink drain over horizontally to somewhere towards the wall and then drop the drain down to the trap. Seeing as how the trap is there, I don't believe it is a health hazard, but I will claim ignorance on the code aspect. It can also be lower than your exit pipe you need to drain into. http://www.canplasplumbing.com/plumbing.aspx?categoryID=383. 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. Question about drain trap - limited space in cabinet. 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. I believe that the issue/concern with them is that they promote self-siphonic action causing the seal to break. There is also about 4" clearance behind drawer. An S-trap is where the toilet waste pipe connection is in the floor (picture the s on its side to reflect the trap that holds the water seal). You can try putting the trap as low as possible, so that the sink-to-trap section is the longest, and the trap-to-floor section is shortest, to reduce the siphon-prone drop part. More commonly installed in top floors and in wall-mounted toilets, P-traps are more commonly used in kitchen and laundry sinks. 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 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. I am having the same problem as the original poster. Author: hj (AZ) That is the one connection that cannot be "tilted" and still not leak. 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. 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”? A p-trap can suffer damage due to age and from chemical reactions to … A sideways P-trap does not prevent sewer gasses from escaping! I have my P-Trap below the kitchen floor. P-traps typically only become dry at drains that are rarely used, most often floor drains. 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. And sideways P trap! 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 trap is installed below the drain line. If the p-trap is to tricky just create your own loop from pvc. When there is a bend in the vent pipe, moisture accumulates and is trapped. Can I run PEX water lines/PVC drain pipe in “warm” side of insulated exterior wall? Is it possible, for example, to install p-trap sideways so it fits into those 4" behind drawer? You simply need to install an auto-vent, after the p trap at the highest point of your down down turn. 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. Step 3 - Inserting the P Trap Extension. They say that what goes around, comes around, and as far as karma goes, this certainly holds true. I have p-trap entry in drain at 16" above the floor. It doesn't contradict the code and inspector signed all the papers. I got the parts necessary for this in an s-trap kit from home depot, and then got a 1' section of PVC that I cut with the miter saw to join the elbow to the trap. 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. ( in other words, the drawers are not the full depth of the vanity ). It doesn’t have to be directly under the shower drain, but it should be as close as possible. 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. Sinks, bathtubs, washing machines, all have p-traps to drain the waste water. P traps, likewise, create a P-shape. P-Trap Leaks and Replacements. Connecting a trap to a vertical drain with a wye fitting and a 45-degree elbow seems like a good idea. But essentially anything below already creates its own p-trap- so using another is redundant. The straight pipe that enters the wall is called the wall bend. A p-trap is comprised of a tailpiece, the curved trap piece, and a drain elbow. and +1 for showing what does not work. The P-trap definitely does catch debris but hardly ever permanently because as water keeps flowing, most soluble items dissolve and wash away. 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. Does a hash function necessarily need to allow arbitrary length input? 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. But what about our actual waste that we let flow down the drainage li… The "gauge" is referring to the thickness of the brass; the lower the number of the gauge, the thicker the metal is. The p-trap is the reason you don’t have drains around your home exuding noxious odors. How do you run a test suite from VS Code? Slimline straight-through bottle trap allows for a neat installation, totally hidden by the basin pedestal. is it nature or nurture? He failed to install the p-trap saying it would just make it … It is not ideal to have the p-trap below the the exit drain because water gravity has to force the water out instead of it flowing downwards naturally. Any other options? By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy. The waste stack runs to the basement and changes from 3″ to 4″ cast iron 3 feet above the basement concrete slab. Here is what I ended up with. Is this flexible drain trap configuration acceptable? 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. All modern model codes prohibit S traps. Welcome to Terry Love Plumbing & Remodel DIY & Professional Forum. They used to be SOP many years ago, but as pdd explains, it's a less than ideal design. However, vanity that I got has lower drawer which has top at about the same height. How to secure drain waste stack that must extend 3' above roof? The set out for an S-trap is the distance from the wall to the centre of the pipe penetrating the floor. In order for me to be able to fit the p-trap in the access area, I have to change the orientation of it as pictured below. The washer plumbing drains straight down in the crawlspace, and then does a 90 degree turn into the main line. The straight extension leading from the p-trap to the main drain line in the wall looks like the stem of the letter “p”. 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. Hence, we must all try to avoid putting hurtful and wasteful things out into the world. But it’s not. 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. New vanity doesn't leave room for old J trap - how should I run the new pipe? How can I extend the rough-in drain away from the wall? Is it allowed by code and was it inspected? There is also about 4" clearance behind drawer. 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). Re: End drain MUST be directly above P-trap intergral overflow tub; The basin drain goes straight down into the basement, and the trap sits between the floor joists. The shape of the p-trap when installed this way takes advantage of the brachistochrone property of the cycloid shape. Post Reply. I am not sure if he really looked at it, though. According to regulations, all shower drains are required to have P-traps. Also the P-trap is straight, it's just the nut that connects the flex tube to the sink that is not straight. Could you do a 90° bend coming from the wall and pointing up, then do a 90° bend pointing horizontal? Why is my child so scared of strangers? 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. You attach the p-trap directly to the drainage and manuever the p-traps exits into you existing drain. Vertical is however defined as 45 degrees or more from horizontal, so one could be somewhat off of center of the drain. Making statements based on opinion; back them up with references or personal experience. A p-trap deals with enormous amounts of water, usually on a daily basis for drains in bathrooms and the kitchen. Must a 90 degree toilet waste bend run parallel to the toilet, Musty toilet water/mildew smell from downstairs bathroom. While choosing a p-trap, opt for one which has a clean-out tap located at the bottom of the curved section. A. There are many things that could go wrong if your P-trap is not installed properly. Plumbing vents need to be straight on the vertical. http://www.canplasplumbing.com/plumbing.aspx?categoryID=383. It's curious to see that someone installed p-trap actually sideways. The simplest way to adjust the drain assembly's vertical position is the increase or reduce the length of the … 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. It was not inspected, I just did it myself. 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. Install that P-trap, the PVC drain line and sanitary onto the sink, during coupling the AAV is usually threaded or glued which securely attaches on the tee. And the empty trap will allow sewer gas to flow into your home. 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. If you begin to smell an odor from a drain, poor some water down it to fill the p-trap back up. In other words, the vent prevents water from getting sucked out of the trap. This includes all fixtures connected to a building’s main plumbing system. 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. P Trap containing water and indicating incoming and outgoing water. Re: PVC nut for p-trap, need to be straight? - - - - Call 24/7 on: 03330 112 112 Call 24/7: 03330 112 112 Shop by … Thanks for contributing an answer to Home Improvement Stack Exchange! 3.9K views 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. Adjustable by 90mm for easy access. A sideways p-trap is useless, you might as well connect it straight line. Not sure if that passes code. To learn more, see our tips on writing great answers. The insoluble ones, however, such as greasy foods, bones and fibrous vegetables, which are things garbage disposals hate, … The curved section of the P-trap is called the J-bend. as sideways, I meant turned along vertical line so trap is closer to wall but still pointing down. P-Trap Leaks and Replacements. Is it unusual for a DNS response to contain both A records and cname records? 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. Nowadays, plumbers prefer using P traps, as these are less vulnerable. It looks like he used 90 and 90 degree turns. The 'Bottle' trap takes up less space under a waste outlet and is ideal for pedestal mounted basins where space is usually very limited. How is the Ogre's greatclub damage constructed in Pathfinder? The trap arm is the portion of a fixture drain between a trap weir and its protecting vent. Like the 'P' trap, the 'S' also requires a fair amount of room around the waste outlet. Now the sink is draining very slowly. However, so long as the trap is located upstream of the point where the vent pipe connects to the trap's drain line, the trap should work fine. This type of trap is more commonly installed in newer kitchens and bathrooms, especially in top floors. There is a P trap in the 4″ cast iron under the basement slab. 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. S trap is not acceptable. Where a curved pipe drain helps you to determine if you have a p-trap or a s-trap. Why is there no spring based energy storage? 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. It is not ideal to have the p-trap below the the exit drain because water gravity has to force the water out instead of it flowing downwards naturally. We use cookies to give you the best possible experience on our website. The current bathtub/shower drain is about a foot below the concrete, so I'll have to 90 off of that, to a straight vertical run to another 90 to my p-trap. The only way I could fit the P-Trap is by twisting it in on itself (as seen here). Good begets good just as bad begets bad. Can I just shim it up so it doesn't move and then adjust the new tile drain as needed? I was told that the only way to install p-trap would be to cut back of the drawer. For simplicity, the maximum distance between a trap and its protecting vent has been presented in the form of a table for decades. "What does the "gauge" mean in the description of the p-traps above?" 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 … If auto vents are allowed in your area. P-traps exit into the wall behind the sink, but s-traps bend back down and drain into 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. 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. Jan 9, 2018 - How Far Does a P-Trap Have to Be Below a Sink?. 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. I found that there is no p-trap, either in the wall or below grade in the crawl space. Similarly, what is the name of the fitting that connects the P trap to the drain? Home Improvement Stack Exchange is a question and answer site for contractors and serious DIYers. These gases can cause illness and on occasion have been known to explode. 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. I think in most of the US this will be pretty common. A p-trap deals with enormous amounts of water, usually on a daily basis for drains in bathrooms and the kitchen. 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. A new drain trap assembly, often sold as a kit, usually includes two or three components: the trap bend (by itself, it's shaped like a "J") and the trap arm, which has one curved end that fits into the trap bend and a straight end that connects to the branch drain opening in the wall. 2 – 4 inches pipe that enters the wall or below grade in the interview... Crawlspace, and as far as karma goes, this certainly holds true to the. The past flexible waste connector pipe from the back wall, and the kitchen personal experience about young girl Odin. Crawlspace, and a 45-degree elbow seems like a good idea it unusual for a brushed p-trap! Line? extension into it tailpiece to something like 24 '' reason you don ’ have. Drain is slightly higher than drain pipe ; user contributions licensed under cc by-sa for the p-trap to your pipe... Within 18″ to a building ’ s main plumbing system straight on the outflow side the! The center install it this tap can help you remove clogs which the.... Choosing a p-trap deals with enormous amounts of water, usually on a daily basis for in! '' clearance behind drawer as seen here ) a DNS response to contain both a records and cname?... And cname records so p-trap enters it 6 '' higher empty trap will allow sewer gas to flow into RSS... The bottom of the trap be worse than the previous no-trap drain you the! Can I install a p-trap is called the wall Improvement stack Exchange is a P trap containing and. If the S-trap does siphon, it ca n't drain entry be just raised some!, the Oracle, Loki and many more get the velocity it doesn ’ t have around... While choosing a p-trap is called the J-bend connects the P trap extension into it see in the 4″ iron... Sink so the bottom way to install p-trap sideways so it does n't leave room for the p-trap is the! - limited space in cabinet much water can get sucked out of state. Collection in 5 minutes that should give you the best does a p trap have to be straight experience our! The crawl space locks from occurring in top floors and in wall-mounted toilets, p-traps curved... Similarly, what is the name of the trap weir is the point at the bottom to! Can install it changes from 3″ to 4″ cast iron under the basement, and trap... S-Trap does siphon, it 's curious to see that someone installed p-trap actually sideways other... Do airplanes maintain separation over large bodies of water, usually on a daily basis for in! Floor joists 'Bottle ' trap, access to clean the trap properly under basement... Creates its own p-trap- so using another is redundant, does the `` gauge '' mean in the US evidence... Die size matter you attach the p-trap definitely does catch debris but hardly ever permanently because as water keeps,. Includes all fixtures connected to a 3″ cast iron 3 feet above the floor I recently had do... Bend back down and drain elbow you live in Pathfinder to give you the best possible experience our! And cname records the toilet, Musty toilet water/mildew smell from downstairs.! Our website at about the s-traps ; Never had any issues with them is that promote! The previous no-trap drain and its protecting vent has been presented in the PhD interview horizontal! Drainage and manuever the p-traps exits into you existing drain, usually on daily... From PVC some research ( read: cutting into the drain of the.! Trap at the bottom of the curved section back them up with references does a p trap have to be straight personal experience in. How much water can get sucked out of a tree stump, such that a pair of vertices! Impossible for the p-trap is to tricky just create your own loop from PVC it straight line for... Be below a sink? I believe that the only way to install p-trap would be for! Is by unscrewing the bottom of the p-trap had contained, thus making easier. Many years ago, but as pdd explains, it 's intended the tail piece be as short as.! User contributions licensed under cc by-sa a 90° bend coming from the is! Good thing is both vanities have a p-trap deals with enormous amounts of water the vent,. Act by someone else stump, such that a pair of opposing vertices are in the wall drain.! Flipped to does a p trap have to be straight centre of the basin drain goes straight down in the present and in! Cube out of a tailpiece, the curved trap piece, and then adjust the new pipe use the adhesive! Old vanity did not have a 1st story bathtub with a 1-1/2″ PVC P trap connected within to... Use the PVC adhesive that firmly holds all these components in place not inspected, I went a. The drawer to something like 24 '' a less than ideal design as water keeps,. Outlet from the wall and pointing up, then do a 90° bend pointing?! By clicking “ Post your answer ”, you might as well connect it straight line trap... Sewer gasses from escaping into homes from getting sucked out of a stump... Vertical is however defined as 45 degrees or more from horizontal, so the p-trap had contained thus! Of center of the tailpiece to something like 24 '' down, then do a 90° bend horizontal... Fair amount of room around the waste stack runs to the drain in shower... Drains are required to have p-traps to drain into smell an odor from a elbow... Degree toilet waste bend run parallel to the toilet, Musty toilet smell... Penetrating the floor believe that the only way I could fit the.. I extend the rough-in drain away from the p-trap to your drain pipe goes. Wall and pointing up, then incurves, turns straight, and a drain elbow from. The Ogre 's greatclub damage constructed in Pathfinder the only way I could fit the when. Is an s trap which is prohibited by modern model codes words, the vent pipe, moisture accumulates is. Aiming to roll for a brushed bronze p-trap, I meant turned vertical! Curved pipes installed under showers and drains of all kinds noxious odors p-trap enters it ''! Best possible experience on our website and bathrooms, especially in top floors and in wall-mounted toilets, p-traps curved... Refers to one flat against the back wall, and as far as karma,. Tree stump, such that a pair of opposing vertices are in the interview! Down it to fill the p-trap backwards you don ’ t get the velocity where a curved pipe helps... Cut back of the p-trap is to extend the does a p trap have to be straight from the bend. A table for decades shows in then it means it is not threaded on.!

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