How to replace a dishwasher air gap install#

Turn the water supply back on and look for leaks. Screw the unit to the underside of the counter. В©Don Vandervort, HomeTipsДЄfter installation, it is important to adjust the applianceвЂ™s front feet to level and align it with the cabinets and countertop. Secure the dishwasher drain line to the disposal. Then do the same with the longer drain hose, running it from the smaller outlet on the air gap to the drain fitting at the base of the dishwasher. Then tighten with an adjustable wrench until snug.ДҐ Slip one hose clamp over each end of the short drain hose that will run from the garbage disposer (see photo) or the sink drainвЂ™s tail piece to the large outlet on the air gap. As you walk the dishwasher into place, be careful not to pinch or tangle the cord or hoses.Д¤ Reconnect the sinkвЂ™s supply tube to the dual-outlet valve, and connect the flexible supply tube to the valveвЂ™s second outlet and the dishwasherвЂ™s inlet. Please see the air-gap video earlier in this article for more about this.ДЈ Position the dishwasher near its opening, and then push the hose, supply tube, and power cord through holes drilled in the back corner of the sink base cabinet. Note: Some local codes allow looping the dishwasherвЂ™s drain hose up under the counter and attaching it to the underside of the counter or the wall instead of installing an air gap. Dishwasher air gap fits into hole in sink top. Tighten the locking nut, using slip joint pliers if necessary, and push the cover back onto the device. Remove the cover and locking nut from the air gap and insert the air gap through the hole from below. If you need to drill a new hole, please refer to the information on this page. Many sinks have a plug that you can punch-out with a hammer. This will require a properly sized unused hole in the sink top.

How to replace a dishwasher air gap install#

Then screw a new dual-outlet shutoff valve onto it and tighten.Дў Install the dishwasherвЂ™s air gap. Wind pipe-wrap tape clockwise around the nippleвЂ™s threads. Then, remove the shutoff valve from the supply nipple with a wrench-again, turn it counterclockwise with a wrench if itвЂ™s on a threaded nipple. Have a bowl or bucket handy to catch the water that will be inside the tube. In most cases, you do this turning the nut (that locks the tube in place) counterclockwise with a wrench. Next, disconnect the sinkвЂ™s hot-water supply tube from the existing under-sink hot-water valve.

Start by shutting off the houseвЂ™s water supply. If your local codes do not require an air gap, you can shape the drain hose of the dishwasher into a high arc instead.ДЎ Install a shutoff valve to serve hot water to the dishwasher. Connect one flexible hose to the drain of the dishwasher, and connect the other flexible hose to the trap of the sink or to the disposerвЂ™s dishwasher inlet. If your local codes require an air gap, youвЂ™ll need to buy it separately. Many local building codes require a dishwasher to connect to an air gap before the connection to a garbage disposer so wastewater doesnвЂ™t flow back into the appliance. Replace the sinkвЂ™s tailpiece with a dishwasher tailpiece. Then plan to connect the dishwasherвЂ™s drain hose to it, as discussed below. If you are connecting to the drain trap of the sink, simply remove the sink drainвЂ™s tailpiece and exchange it for a dishwasher tailpiece. (You donвЂ™t have to remove the disposal to do this.) В©Don Vandervort, HomeTips If youвЂ™ll be connecting a dishwasher drain hose to the disposal, first remove the dishwasher plug, using a hammer and screwdriver.

To connect to the garbage disposal, you must first knock out the plug inside the dishwasher nipple. The dishwasherвЂ™s drain water will exit through a flexible hose that runs from the waste outlet of the dishwasher to a tee above the sinkвЂ™s drain trap or to the dishwasher inlet of the garbage disposal. More about this in the step-by-step information below. The hookup is generally via a 3/8-diameter copper tube attached by compression to a dual-outlet shutoff valve under the sink.

The dishwasher must connect to the hot water supply of the sink.