[jcanavera]

On my 27' Safari the white spout on the curb side is the fresh water tank drain. The two smaller valves, like radiator drains just to the rear of the fresh water tank drain, are the low water drains for the hot and cold water lines. The other drain you are looking for may be in the streetside rear hatch. You reach in the hatch and if facing it, on the far right side of the compartment (towards the rear of the trailer) is a valve which drains the water that is in the line just upstream from the water pressure regulator.

Hope this helps.

Regards,

Jack