Buoyancy of its internal float ball provides force to operate lever valve to maintain liquid level in a tank. Feature cast iron construction, 1-1/2" NPT connections, 316 stainless steel float ball, steel lever and turnbuckle assembly. Lever and turnbuckle assembly are adjustable to ease installation and connection to lever valve. Mounting bosses present can be tapped for optional sight glass assembly. Photo: 377 w/8" diameter 316 stainless steel float ball with brass float rod, and 3' adjustable turnbuckle assembly shown separately.