GTV Series Thrush Pumps are in-line, vertical, bronze fitted, close-coupled, centrifugal pumps specifically designed for quiet, efficient operation in hydronic heating and air conditioning systems. The GTV’s casing design allows for quiet performance and cost efficiency. Improved bracket design incorporates a diverging seal chamber that creates a vortex action which stimulates circulation within the seal chamber. Circulation is necessary to eliminate air and foreign particle buildup and carries off frictional heat developed at seal faces. The GTV bracket also incorporates internal flush line which increases recirculation in the seal chamber and provides manual venting. The GTV offers a back pull out design which allows for maintenance without disturbing existing piping. Shaft wear and corrosion are prevented by the bronze shaft sleeve. The GTV offers a 3 bolt flange and ceramic seal as standard.