General description Replacement flow meter fits stainless steel manifolds, allowing the installer or operator to view the flow rate through each circuit. By monitoring the number of gallons per minute (GPM) entering each loop of the radiant heating system, you can effectively balance the flow rate using the valve and flow meter. This is crucial for ensuring even heating across your PEX circuit. Technical specifications Flow Meter Interface: G1/2 Thread Adapter: G1/2 to G3/4 Color: Red Material: Brass + Stainless Steel Measurement allowed error: +/- 1-3 cm Package contents 2 x Flow Meter 2 x Adapter