Blind Flange, PVC Schedule 80 1-1/4" (853-012)

Blue Monster 76037 1-Step PVC Cement Clear (32OZ)

The 1-1/4" PVC Schedule 80 Blind Flange (853-012) provides a solid, pressure-rated means of terminating, blanking off, or isolating a flanged pipeline end without cutting or permanently capping the line. Manufactured from rigid gray PVC conforming to ASTM D1784 Cell Class 12454, this blind flange is built for the chemical resistance and pressure demands of industrial, municipal, and commercial piping systems.

Unlike a solvent-welded cap or plug, a blind flange bolts directly to a mating flange face, creating a fully removable closure. This is a critical advantage in systems that require periodic access—such as flushing ports, testing tees, future connection points, or cleanout locations—where a permanent cap would require cutting into the line to reopen. Simply unbolt the blind flange when access is needed, and re-bolt when the line is returned to service.

The 150 lb. ANSI/ASME B16.5 bolt pattern ensures direct compatibility with standard PVC slip flanges, threaded flanges, and flanged valves and equipment throughout the system. Schedule 80 construction meets the same pressure class as the surrounding Schedule 80 pipe and fittings, maintaining consistent system ratings from end to end.

Gray PVC delivers broad chemical resistance to acids, bases, salts, and a wide range of industrial fluids, making this blind flange a practical and economical choice wherever stainless steel or other metals would be subject to corrosion. For service temperatures above 140°F, refer to CPVC equivalents.

Specifications:

Industries & Applications:

• Chemical Processing — Blanking off unused branch connections or isolating line segments during system modifications
• Water & Wastewater Treatment — Capping flanged test ports, cleanouts, and future tie-in points at pump stations and treatment facilities
• Industrial Manufacturing — Terminating process piping runs with a removable closure for periodic flushing or inspection access
• Irrigation & Agriculture — Sealing flanged mainline ends on pump stations and filter manifolds while preserving future expansion capability
• Municipal Infrastructure — Isolation and blanking of flanged connections in lift stations, distribution systems, and treatment plant piping
• Aquaculture & Aquatics — Capping unused flanged ports on recirculating system manifolds and filter housings
• HVAC & Plumbing — Terminating flanged runs in commercial mechanical systems with a reusable, non-destructive closure