I am currently working on getting a hydro seeder running that has sat for a long time. There are two 1-1/2" bronze pipe swivel fittings for the gun on top that are leaking pretty bad under pressure. I haven't tried taking them off or apart yet. Does anyone know if they are repairable or how they come apart? I saw a listing in a McMaster-Carr catalog for a similar type joint and it mentioned bearings and an O-ring. Thought I would see if anyone was familiar with them before I started in on them.