The Mighty Pump drain line pump by Rectorseal is amazing. You no longer need a wet-vac to plug in to clear a drain from outside the house. This thing has so much suction it is unbelievable and is light and takes seconds to clear a clogged drain. Finally something that really makes something a little easier. no more cutting drain lines to blow out with nitrogen or co2 cartridges. Found it at gemaire distributors, very inexpensive. By the way it only sucks out and doesn't blow back into the drain like others that were on the market.