While not "equipment," strictly speaking, no coffee shop can open without being fitted for the right electrical and plumbing requirements. Espresso machines have special electrical needs more akin to a fridge or a stove than your coffee maker at home. Espresso machines must also be directly connected to a water source to fulfill their water needs. Drainage is also required. Water softeners in the water line will prevent mineral build up in the machines, one of the biggest sources of problems with espresso makers.