Patent attributes
An adjustable valve includes a main valve body having a first end portion, an oppositely disposed second end portion, and an endless cylindrical wall extending therebetween. Oppositely disposed flanges, including respective flange apertures, are formed in the endless cylindrical wall for accepting cylindrical fluid conduits. A fluid flow volume is positioned within the main valve body and disposed between the aperture flanges. A plug is controllably insertable through the first end portion into the valve to at least partially obstruct the fluid flow volume. An at least partially hollow cylindrical drum is rotatably connected within the main valve body, wherein the drum has a pair of oppositely disposed drum apertures formed through a wall thereof. The drum is rotatable to at least partially align the pair of oppositely disposed flange apertures to define an unobstructed fluid flow path through the valve body.