Description Watflow 2" Dry Gas flowmeter 2-20 SCFH for 2-3 Chamber, Brass Connection. 1/8" female NPT inlet and outlet. Without valve: 100 psig/6.9 bar @ 65°C/150°F. With valve: 100 psig/6.9 bar @ 48°C/120°F. It made of acrylic plastic body include o-ring. metal parts: brass(standard) or stainless steel (applicable models), float (varies by range): blackglass, nickel/copper alloy, stainless steel, or aluminum