Arrived at location on 2/2/22 - Arrived site check free standing floor model steamer. Customer doesn’t have steamer in operation. Checked drain connection and found customer reworked drain from unit to floor drain In steel plumbing. Air gap present. Brought steamer into operation. Steam generators filling with water and found drain plumbing connections between drain box to drain valve and to steam generator dripping water on both generators. Tightened all fittings, as some were quite loose. Stopped water leaking. Steam generators fired to heat. Tightened all 8 compression fittings, which were difficult to tighten. Checked, no water leaking from fittings. Steamer back in operation.