The plumbing kits includes a water pump, 10' of 1/4" tubing, a 1/4" brass insert for brass valve connection, and a drain kit with a 3/8" pipe adapter on the end. A horizontal kit includes the same but has a 1/4" pipe adapter on the end. Vertical sanders and combo units use the standard plumbing kit. Flat sanders and mini professional lathes utilize the horizontal kit.