I bought a Permagreen Centri last week. I decided to go with a used unit and graduate up to a better (or newer) machine as business progresses. Looking at the sprayer, Im not sure the hoses are connected correctly and need some input. The intake hose at the bottom of the tank and the agitation line at the top of the tank are connected together with a tee and then go into the pump. Is that correct on this unit. My thinking was the agitation line should be tee'd in after the pump with a valve to be able to switch from agitation to the spray nozzle. Can anyone conform this on this unit? Or is that line used as a pressure relief instead of a agitation line?