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. They both work and have seen it many times. But essentially anything below already creates its own p-trap- so using another is redundant.
How far below drain should P-trap be?
According to the International Residential Code, the maximum vertical distance between the sink drain and the entrance to the p-trap is 24 inches.
Can P-trap be higher than waste pipe?
No a P trap works in gravity with a constantly downward flow. Gravity drains dont work uphill unless you pump the fluid.
What is the standard height for a sink drain?
Average Distance
In the bathroom, the sink drain is typically between 24 inches above the floor. This measurement is based on an average bathroom counter height of 32 inches and a drop-in sink with an average depth of 8 inches.
Can your P-trap be lower than drain pipe? – Related Questions
Can you put a 90 in a drain line?
It’s a bad plumbing practice to have a hard 90-degree bend in a horizontal drain line that’s buried in a slab or otherwise hidden. If you have to make a 90-degree bend, use two 45-degree fittings and put a small piece of straight pipe between the fittings, if possible.
Can a sink drain have a 90 degree elbow?
1-1/2 in. plastic 90 degree slip joint elbow includes 2-slip joint nuts and 2-washers. This elbow is perfect for tubular drain applications.
How much drop should you have for every foot of drain pipe?
The ideal slope of any drain line is ¼ inch per foot of pipe. In other words, for every foot the pipe travels horizontally, it should be dropping ¼ inch vertically. Many drains either have too little slope or too much slope. That’s right, it is possible to have too much slope in your drain lines.
How far from a sink is a GFCI required?
The National Electrical Code requires outlets be installed in a kitchen that has a sink 12 inches wide and 24 inches deep. That outlet must also be within 2 feet of the sink. Bathrooms must have at least one electrical outlet, it must be GFCI, and it must be within 3 feet of the sink.
Can a sink drain be higher than the sink?
There is no required maximum depth of the trap, but if it gets too tall, you may get waste standing and rotting in the trap. Since this is a bathroom sink, not kitchen, that shouldn’t be an issue for you.
Can a sink trap be too deep?
When the trap is too deep, liquid may flow through it too fast, which can lead to siphoning of the trap seal and sludge buildup. The drain connection at the wall is too high on this sink, resulting in a 9-inch-deep trap seal — 5 inches deeper than is allowed by code.
Can a sink drain be too steep?
An insufficient slope slows the movement of water and solids, contributing to clogging and other problems. Too steep a pipe slope can cause liquids to separate out of the waste water and run downhill faster than solids.
What happens if a drain has too much slope?
Backups: When the slope is too steep or not steep enough, backups can occur, preventing liquids and solids from draining. Excessive erosion: When pipes become clogged due to an improperly sloped pipe, water may be forced around the pipe, causing extreme erosion to the surrounding soil and bedding.
What is code for slope of drain pipe?
According to the California Plumbing Code, a residential sewer must begin two feet outside the building, connect to the public sewer and have a minimum slope of 1/4 inch per foot.
What is the correct slope for drainage?
How Much Slope? The standard slope for proper concrete drainage is a one-quarter inch drop for every foot of length. So, to calculate the difference in height between one end of a patio or walkway and another, simply multiply the length by one-quarter.
How much slope is needed for a pop up drain?
Pop-Up Emitter Installation
In order to allow for proper flow, you’ll need to make sure the drain pipe is sloped correctly. Every yard is different, but a good starting point is a 2% slope. Start the installation process by digging a trench that extends from the starting point to where the emitter will be installed.
What is a good rule of thumb for installing drainage?
According to the DIY Network, to ensure water will drain properly and won’t back up in the drain line, a good Rule of Thumb to follow when installing pipe (or ensuring that a professional is doing it properly) is a drop of ¼ -inch per foot.
What is a 2% slope for drainage?
Using a minimum slope of 2% will encourage a good flow when directing water to a rain garden. For a 2% slope your pipe height will lower ~¼ inch for every foot of length. You can also approximate this by multiplying the pipe length in inches by . 02.