the garbage disposal can be operated by an air switch. works great. our electic outlets are built in at the ends of the island into cabinetry.

The Plumbing Codes will permit up to 3 sinks of a common type and size in the same room to be connected to one common P-trap permitting that the maximum horizontal distance from the center of the sink drain opening to the P-trap is not more than 30". When a disposal is attached to one sink the sink drains are required to be connected by means of a baffled Tee. Under ordinary circumstances if the "waste arm" from the wall is midway between the sinks we would use a "Center Waste Kit" which has a horizontal baffled tee and a short horizontal line to each sink. With the common center waste kit both of the horizontal lines have a 90-degree bend on the end of the line turning upwards to attach to the sink tailpiece. When we attempt to connect a disposal with a common "Center Waste Kit" or "End Waste Kit" we run into a problem because the discharge port from the disposal is approximately 3" below the sink drain and the disposal drain port is a horizontal port. If we then attach the manufacturers supplied ¼ bend to the disposal port that will place the waste kit to low to properly connect to the waste arm from the wall. When connecting a double sink with a disposal you should first select a "Disposal Type Center Waste Kit". The disposal type kit has one horizontal line with the preformed 90-degree bend to attach to the sink opposite the disposal. The cross tube to the disposal is a straight tube with a flange on the end. You begin by discarding the formed ¼ bend that comes with your disposal unit and attach the flanged cross tube to the disposal using the rubber gasket and steel lock-ring supplied with your disposal. This will give you a cross tube coming straight off the disposal at the same level as the disposal discharge port. You then connect the baffled tee with the side opening pointing downward, which will then input into the P-trap. From the opposite side of the Tee you attach the horizontal cross tube with the preformed ¼ bend on the end, which will then connect to the sink tailpiece. To answer your second question, will it matter which way the TeeÂs are oriented? The answer is yes. An "End Waste Kit" has a vertical Tee; which only has one baffle to direct the flow from the side input to the vertical drop position. A Center Waste Kit has a Horizontal Baffled Tee which two baffles, one in each direction to direct the flow from the ends of the Tee to the side outlet. If the TeeÂs are used in the wrong configuration the baffles will cause an obstruction to flow.

Dave Gardner, Thank you for the question. I is rull interested in plumbing problems. I am great at this and highly qualified due to my dual degrees in Quantum Mechanics and Toilets. Water standing is bad mmmmkkkk. Water flows downhill. I recommend you consult this website for help. http://en.wikipedia.org/wiki/Quantum_realm Good luck with your plumbing endeavors, PlumberPatty

No idea. I just bought the house a couple months ago. It almost looks like it is twisted from the inside somehow. Guess I need a new one?