Flush valve and drain system for recreational vehicles

A drainage system to be interfaced with a recreational vehicle to permit the contents of a holding tank from said vehicle to be emptied via a drainpipe, said drainage system comprising:

• a hollow drain valve body defining a drainage flow path communicating with the holding tank and through which fluid contents of said tank passes;
• flow control means operable in said drain valve body to control the passage of the contents of said drain pipe through the flow path of said drain body;
• manual means to enable said flow control means to be moved to a first position in said drain valve body and across the flow path to block the passage of the fluid contents therethrough or to a second position in said drain body and out of said flow path to permit the passage of fluid tank contents therethrough;
• a fluid inlet pipe composed of a transparent material and communicating with said flow path for conducting the fluid content wherein said fluid inlet pipe is interconnected at one end with said drain valve body ahead of said flow control means and loser to the recreational vehicle than said flow control means, said fluid inlet pipe supplying fluid to said drain valve body only when said flow control means is moved to said first position across said flow path;
• said fluid inlet pipe rotatably mounted on said drain valve body and having an elbow shape;
• a rotatable mounting means interconnecting said fluid inlet pipe with said drain valve body;
• and
• said rotatable mounting means includes a flange carried on said fluid inlet pipe and said flange movably disposed in a groove provided in a removable end plate of said flush valve body.

A drainage system for detachable connection between a vehicle drain outlet and a disposal conduit comprising:

• a flush valve body having a pair of removable end plates with a circular groove provided between each plate and said flush valve body;
• an inlet pipe having a circular flange disposed in one of said circular grooves and an outlet pipe having a flange disposed in the other of said circular grooves;
• said inlet pipe and said outlet pipe rotatable with respect to said flush drive body via said flange and said groove relationship;
• said inlet pipe and said outlet pipe composed of a transparent material permitting observation therethrough;
• and
• a sealing means disposed in each groove bearing against said flange to prevent leakage while maintaining rotational movement of said flanges.