Plumbing Supplies

Borosilicate Valve Sight Glass - Clear Glass Disc for Boiler Valves, 30-150mm Diameter, 15mm Thickness, 1pc(95mm) Durable Borosilicate Glass: Our valve sight glass is made from high-grade borosilicate glass, ensuring stability under extreme temperatures, high pressure, and vacuum conditions. Convenient Flange Installation: Designed with a flange connection for... Borosilicate Valve Sight Glass - Clear Glass Disc for Boiler Valves, 30-150mm Diameter, 15mm Thickness, 1pc(95mm)