What size is a dishwasher supply line?

Asked By: Laurel Idarreta | Last Updated: 20th February, 2020
Category: home and garden home appliances
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The elbow is 1/2-inch NPT (National Pipe Thread Taper) on one end, and 3/8-inch compression fitting on the other end. The supply line is not included with the dishwasher. Most plumbing supply stores sell water supply lines of various lengths up to 10 feet long. A stainless steel supply line is recommended.

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Likewise, people ask, what size are dishwasher hoses?

Built-in Dishwasher Drain Hoses. All GE Appliances dishwashers manufactured since July 1989 include a drain hose with an inside diameter (i.d.) of 5/8". The hose furnished is 78" in length.

One may also ask, what water line does a dishwasher use? Dishwashers use only hot water for cleaning. Dishwashers are connected to the hot water line, which allows the dishwasher to wash with the hottest possible water. Hot water commonly is more effective for cleaning the dishes and, coupled with the heat cycle of the dishwasher, can sanitize the dishes.

Hereof, do dishwashers come with supply lines?

Water supply: A dishwasher needs hot water. Drain line: The dishwasher will come with a hose used to connect the dishwasher to the drain under the sink. Normally the hose is connected to an inlet in the garbage disposal. Because you don't have one and don't want one a little simple plumbing is in order.

Do dishwashers need an air gap?

Air gaps are the most effective means of preventing your drain from cross-contaminating your dishwasher with waste. If you want to protect your dishwasher from flooding with contaminated water, you need an air gap. Dishwasher air gaps are also required by plumbing codes in many locations.

37 Related Question Answers Found

Are all dishwasher drain hoses the same size?

Most residential dishwashers have the same hook up for the dishwasher drain and the water supply. The standard dishwasher drain hose size is 5/8"(I.D.) inside diameter on both ends. The drain, electric, and water connections are all located on the bottom of the dishwasher.

What is the standard size water supply line?

In most cases, the main pipeline from the street to your home is either 3/4 or 1 inch in diameter, supply branches use 3/4-inch-diameter pipe, and pipes for individual components are 1/2 inch. Remember that water pressure decreases by a half-pound per square inch for every foot pipes extend above your water supply.

Are dishwasher hoses Universal?

Corrugated Dishwasher Hose from Everbilt features a universal design that is compatible with most dishwashers. The corrugated texture allows flexibility in small, tight spaces. The ends will fit on most stubs.

Do I need a plumber to install a dishwasher?

Depending on which step is causing the hiccup during in the installation process, you may need a new part, a plumber, or an electrician. In this case, you should call a plumber. A dishwasher is an investment. To get the most out of it, and to ensure it's working properly, you need a licensed plumber to take a look.

What is an air gap for dishwasher?


An air gap, as it relates to the plumbing trade, is the unobstructed vertical space between the water outlet and the flood level of a fixture. A common use of the term "air gap" in home plumbing refers to a fixture that provides back-flow prevention for an installed dishwasher.

Why does dishwasher drain hose need a loop?

GE: "If an air gap is not required, the drain hose must have the high loop from the floor to prevent backflow of water into the dishwasher or water siphoning out during operation." This keeps the drain hose dried out and keeps any odors from backing up into the dishwasher.

Is it difficult to install a dishwasher?

This can make it difficult to remove the old dishwasher and install the new one. In some cases, you have to either loosen the countertop or remove flooring when learning how to hook up a dishwasher. Turn off the power to the dishwasher at the main panel or unplug it under the sink.

How is a dishwasher connected?

Connecting the drain hose on a dishwasher is an equally simple plumbing job. The drain hose connects to the drain trap under your sink, and on the way, it either loops up to the underside of the countertop under the sink or is attached to an air-gap fitting.

How long should a dishwasher last?

between seven and 12 years

Can I drain dishwasher into basement?


I've seen hundreds of washing machines and laundry tubs use a makeshift “stand pipe” to divert the water to a basement floor drain. They drain sinks into floor drains like that in restaurants all the time but in the basement like that with food in the dishwasher waste I would just tell them to call out a plumber.

What water line do you hook up a dishwasher to?

Check under the sink that the dishwasher line is actually hooked up to hot water pipe. If it is not, you will have to switch out the valves under the sink to you can attach the washer line to the hot water pipe.

What comes in a dishwasher installation kit?

This kit includes everything needed for easy installation and fits most dishwashers. The kit includes a 6 ft. nylon braided, industrial grade water supply hose, 5 ft. power cord, Teflon tape, strain relief bracket, wire caps, and 3/8" brass compression fitting with elbow and in-line tee.

Does a dishwasher have to be next to the sink?

The obvious place for a dishwasher is right next to the kitchen sink. Dishes and pots can be scraped and rinsed, then placed in the dishwasher without moving your feet at all. Another logical location for a dishwasher is near storage areas for dinnerware and pots.

Can you plumb a dishwasher into hot water supply?

Many dishwashers are designed to work by heating up water from cold. Some dishwashers can be connected to a hot water supply though. If so, it should say so in the instruction manual. If you do connect a dishwasher to the hot supply you should use a hot fill hose, which is designed for use with hot water.

Do water supply lines need Teflon tape?


Most faucets will have hot and cold water supply lines attached, so you just need to connect them to the appropriate water supply line. You may need to use Teflon tape (aka plumber's tape) for this part, which is used to seal and lubricate threaded pipe joints.

How do I stop my dishwasher from leaking?

Dishwasher Leaks
  1. Every six months or so, remove the kick plate at the bottom of the dishwasher while the unit is running. Take a look underneath with a flashlight.
  2. If there's water on the floor in front of the unit after a wash cycle, it's probably leaking out around a worn or defective door seal.

Where is the shut off valve for dishwasher?

The water valve to the dishwasher is usually located under the sink. There may be several valves under the sink, but the dishwasher valve should be on a pipe or hose going through the cabinet into the dishwasher. To make sure the valve is open: Turn the handle counter-clockwise (to the left).