Ok, it was free. And it is OLD. We have cleaned it, put it in place. The heater/pump is 110, it heats by using the waste heat from the motor running. We have everything except an owners manual and whatever connects the heater/pump unit to the fixtures on the hot tub. We have been told it was connected by two flexible hoses? We also need to know how to put the two small tubes into the two large pvc pipes that are in the heater/pump unit. Does anyone have a clue as to what I am talking about? Thanks for any info at all! I can send pictures next week of need be!