In a sense, all drains go through the floor. You cannot have a code-approved sink drain going down, unless you have a vent going up.
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Likewise, What is the standard drain size for a bathroom sink?
While a bathroom sink’s design and overall size may vary from one model to the next, the drain holes are fairly standard, 1.25 inches being a general standard, with widths of 1.5 inches and 1.625 inches also common. The size of the hole helps determine which size drain is needed for that particular sink.
Also, Can you put a 90 in a sink drain?
It’s fine to have a larger-radius (sweep) 90-degree bend at the base of a vertical drainage stack where the wastewater starts to travel horizontally. It’s also a good idea to have a sweep 90-degree fitting where a drain pipe pops out of a wall for a kitchen, vanity or laundry sink.
Moreover, Can a p-trap be higher than the drain pipe?
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 under a sink can the p-trap be installed?
According to the International Residential Code, the maximum vertical distance between the sink drain and the entrance to the p-trap is 24 inches.
What size is the drain and trap for a bathroom sink?
Traps come in 1 1/4 inch (standard bathroom sink) or 1 1/2 inch (standard kitchen sink) inside diameter sizes.
Are all bathroom sink stoppers the same size?
There is no universal drain hole diameter that applies to every bathroom sink, but 1 1/2 inches is the most common size for a bathroom sink drain opening, according to Signature Hardware. Some bathroom sinks have a slightly narrower opening at 1 1/4 inches, while others are a bit wider at 1 5/8 inches.
Do I need an overflow on my bathroom sink?
No, bathroom sinks do not necessarily need an overflow valve. The overflow serves two purposes, it diverts water back to the drain pipe and it improves drainage speed. However, even with an overflow, you should never walk away from a running faucet if you don’t want to risk water on the floor.
Does the vent go before or after the P trap?
Plain and simple, the vent comes AFTER the trap. A vent before the trap does absolutely nothing. The open drain inlet at the bottom of the sink is the vent before the trap. It is why fixtures do not need ANY vent to drain, they need a proper drain to not siphon the trap.
Are tub drains and sink drains the same size?
Are all bathroom sink drains the same size? While a bathroom sink’s design and overall size may vary from one model to the next, the drain holes are fairly standard, 1.25 inches being a general standard, with widths of 1.5 inches and 1.625 inches also common.
Can plumbing vent pipes have 90 degree angles?
Vent pipes, often narrower than drainpipes, need not slope like drainpipes. … Vent pipes must be installed so they stay dry. This means that they should emerge from the top of the drainpipe, either straight vertically or at no less than a 45-degree angle from horizontal, so that water cannot back up into them.
What can I use instead of p-trap?
Recently I discovered the amazing HepvO Waterless Valve. It’s a new solution to this old problem. Using a flexible silicon tube inside that seals out air but allows water to flow in one direction, it performs the same task without using any water and without being large and bulky like a p-trap.
Does a bathtub need a p-trap?
P-traps are S-shaped pipe components that keep toxic sewer gases from escaping into your residence. They are required on all plumbing fixtures, including sinks, tubs and showers. Toilets have built-in traps.
Does every P-trap need a vent?
A great example of siphoning is a toilet. Toilets use controlled siphoning to flush and then fill the toilet back up with water (to serve as a trap). If a p-trap does not have a vent, it does the same thing, except that, since it is not “controlled” the chances are that the siphoning effect will leave your trap empty.
Does P-trap have to be directly below sink drain?
The “P” trap SHOULD be directly under the drain, but no more than a few inches off center of it, if conditions require it. NO trap, TWO traps, and/or a 9 foot offset are NOT allowed and if he suggests any of them get a different installer who is a REAL plumber.
What can I use instead of P-trap?
Recently I discovered the amazing HepvO Waterless Valve. It’s a new solution to this old problem. Using a flexible silicon tube inside that seals out air but allows water to flow in one direction, it performs the same task without using any water and without being large and bulky like a p-trap.
Are there different size sink drains?
Most drain openings are 1 1/4 inches, although 1 1/2 inches and 1 5/8 inches are also common sizes.
How do you size a drain pipe?
Below grade drain pipes shall be not less than 1 1 / 2 inches (38 mm) in diameter. Drain stacks shall be not smaller than the largest horizontal branch connected.
…
P3005. 4.1 Branch and Stack Sizing.
| NOMINAL PIPE SIZE (inches) | ANY HORIZONTAL FIXTURE BRANCH | ANY ONE VERTICAL STACK OR DRAIN |
|---|---|---|
| 1 1 / 2 b | 3 | 4 |
| 2 b | 6 | 10 |
| 2 1 / 2 b | 12 | 20 |
| 3 | 20 | 48 |
How do I measure my bathroom sink hole?
Here’s how to measure for a basin
- Start with the width. Measure the distance from one side of the basin to the other.
- Next, measure the length. This is the distance from the rear of the basin to the front.
- Then, on the exterior of the basin, measure from the top to the bottom. …
- Finally, measure the depth.
How do you measure sink drain hole?
Measure straight down from the center of the overflow to the point at which the drain is mounted to the tub: depending on what’s easiest to get to, you can measure from outside the tub down to its underside, or from inside the tub to the tub floor. Do not follow the curve of the tub; measure straight down.
What is the most common size of the drain piping on a kitchen sink?
Pipe Size. Some older sinks may have drains that connect to a 1 1/4-inch tailpiece, but most modern drains have a 1 1/2-inch outlet. All the pipes that connect to the tailpiece, including the P-trap assembly and all the horizontal extensions, are either 1 1/4 or 1 1/2 inches in diameter.
Why does a bathroom sink drain have holes?
They serve two functions: to prevent an overflow with the drain stopper engaged and to provide an escape route for air in the drain. Without this hole, a full basin of water would drain slowly because of the resistance it puts on air escaping up from the drain.
How does the overflow work in a bathroom sink?
An overflow is an optional feature found in some bathroom sinks. As the name suggests, it helps prevent the sink from overflowing. An overflow is a small opening in the sink, and it works by letting air flow into the drain while the sink is full of water so the sink drains water more quickly.
How does pop-up sink drain work?
The pop-up mechanism is activated by simply pressing down on the drain cover. … Drains with pop-up rods feature stoppers and lift rods that are activated by pulling up on the lift rod located at the back of the faucet. The lift rod is attached to the drain underneath the sink and will lift and close the drain cover.
