Bought this from a local mom n pop appliance store. They gave me the specifications sheet and told me to check the dimensions because the batch feed disposals take up a lot of vertical height. I checked and there seemed to be no problems and they sold me on using the stores delivery and installation. The guy installed it halfway and then realized we also needed a plumber to lower the drain. Had to chase them back to get a refund on the installation but it was only a partial refund. The dimensions on the insinkerator spec sheet are not detailed enough to show where the position of the drain and the p-trap needs in relation to the disposal unit. Would have saved a lot of headaches.