1 in. (25.4 mm) Bronze Sight Glass FxF NPT with 1/2 in. (12.7 mm) Restricted Orifice is a must-have flow test accessory for any water-based system, including fire sprinkler systems. Cast from bronze alloy for lasting performance and serviceability.
The National Pipe Thread (NPT) inlet and outlet make installing and using the 1 in. (25.4 mm) Bronze Sight Glass easy. This model features a 1/2 in. (12.7 mm) Female NPT 1/2 in. (12.7 mm) restricted orifice used to simulate sprinkler system head flow and a 1 in. (25.4 mm) Female NPT (FNPT) inlet.
Simulated sprinkler system head flow can be viewed through either of two high-impact acrylic windows on either side of the 1 in. (25.4 mm) Bronze Sight Glass. Each window secures with a leak-proof NBR O-ring.