I have 2 Leybold Trivac D60 vacuum pumps. Both came from remodeling projects and I salvaged them. One has a 3 Phase 2 HP motor. Other one I pulled motor off but saved the couplers thinking I was going to use it with a small engine. They have been sitting in my shed for about 2 years and I don't see me using them anytime soon. Gravity vacuum seems to be working well enough. Feel free to make me an offer on one or both. $750 for pump only, $1000 for motor and pump. Google them, they are a tough industrial pump. 36.7 CFM