This replacement flow meter is suitable for stainless steel manifolds. These flow meters allow the installer or operator to view the flow through each circuit. By looking at the number of gallons per minute (GPM) entering each loop of the radiant heating system, you can use the gate valve and this flow meter to effectively balance the flow. It is important to balance your PEX circuit so that you can heat the floor evenly. Flowmeter interface: G1/2 thread Adapter: G1/2 to G3/4 / Surface drawing large flow manifold pipe for floor heating 304 degaussing 2-way manifold stainless steel pipe Main pipe diameter DN25 (mm), branch pipe diameter G1/2 (mm) Wall tube thickness 16mm, water pressure 100bar Colour: Red / Silver Material: brass + stainless steel / 304 stainless steel<br><br>Package Contents: 1 x Flowmeter 1 x adapter / 1 x Stainless steel tube for flowmeter<br><br>Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.