Patent ID: 7793688

Claim:
In a system to winterize a recreational vehicle having plumbing lines, a recreational vehicle winterizer fitting comprising: a compressor coupler having in sequential order a nib defining a first chamber diameter, a landing lip extending radially out from the nib and then a landing defining a second chamber diameter, and a first transition defining a third chamber diameter, where the third chamber diameter is greater than the second chamber diameter, and where the second chamber diameter is greater than the first chamber diameter; a single piece construction having tabs having a fourth chamber diameter connected between a second transition having the fourth chamber diameter and a body having a male connector and a fifth chamber defining a fifth chamber diameter, where the fourth chamber diameter is greater than the third chamber diameter and the fifth chamber diameter is not greater than one inch and is greater than the fourth chamber diameter, where the first transition and the second transition are connected to define a fitting passageway through the recreational vehicle winterizer fitting characterized by each of the chamber diameters to receive a fluid flow in the nib, through the fitting passageway, and out the male connector; a bottle fitting attached through the body adjacent to the tabs to define an additive passageway having internal threads on one end and an additive passageway outlet that leads to the fifth chamber on the other end, whereby the additive passageway is orientated and configure to use the fluid flow to feed a continuous stream of additive from an additive bottle connected to the bottle fitting from a position at a bottom of the body; a stem attached through the body, where a handle is attached to the stem outside of the body, where the stem includes a plug positioned inside the body directly over the additive passageway outlet, and where a spring is positioned in compression about the stem and against both the plug and an interior surface of the of the body to bias the plug down towards the additive passageway; a pressure gage attached through the body at a position adjacent to the male connector to advantageously obtain a more accurate representation of pressure inside the plumbing lines, where the pressure gage includes a pressure gage dial; and a butterfly valve having a valve rod connected through the body at a position between the stem and the pressure gage, where the valve rod is attached to and through a plate positioned within the fifth chamber and attached to a pressure regulation knob positioned outside the body, where the pressure gage dial faces towards the pressure regulation knob.