**Hansen Full-Flow valves do not restrict pipe flow when fully open.
Hansen HiFlo check valve is used in-line to stop fluids reverse-flowing in the pipe. The unique Hansen design reduces flow restriction to the minimum. The screw cap allows for easy valve-access for service or replacement of diaphragm and spring. (Replacement diaphragm and spring sets are common to both check valves and foot valves of same dimension.) BSPT thread.
The Max Flo trough valve gives a much greater flow rate than Super Flo valves, and is also much more capable of dealing with sediments. It is supplied complete as pictured, with 2 adaptors, adjustable float arm, optional extension for float arm, 60cm of cord and a 100mm ball float. Max Flo flow rate is 570L/min @ 29p.s.i.