There is a connector that I do not know what to use it for. I understand the 3 nozzle adaptors and the pressure release valve but I do not know what the other large ?nozzle is for or what it connects to. Help!
sorry not sure either?....just use one of the nozzle so far on the boat tube?...maybe air-bed ?
The larger nozzle would be for a towable or float that uses boston valves, which have a much larger opening than most other tubes.