With NIBCO, accurately balancing HVAC and mechanical hot and chilled water systems is quick and simple. Our FLO-BOSS 1810 Series fixed orifice manual balancing valves are faster and easier to set because they do not require any special calculators or meters. Integral pressure temperature ports provide a direct readout across the orifice; optimum flow is quickly and accurately determined by simply measuring the differential pressure. NIBCO FLO-BOSS fixed orifice solder end manual balancing valves also provide an isolation function for system maintenance, with an integral memory stop feature allowing the system to be returned to its retained settings once maintenance is complete.