Every GapVax VHE Hydro Excavation machine is custom built to the customer's needs. Vacuum systems can range from 18" to 27" Hg with either front or rear mounted boom. Water systems can range from 2000 psi to 4000 psi and 4gpm to 40gpm. Many customers will add water boiler systems and heaters in the tool boxes to help work in sub-freezing weather. Debris tanks can range from 4 - 15 yards made from 3/16" grade 50 EXTEN steel. Options are vast on these machines so please reach out and we can help to built your next wet-only hydro excavator.