3/4" Flange (Loose Ring), Spigot PVC Schedule 80 (856-007)

The 856-007 is a Schedule 80 PVC loose ring flange with a 3/4-inch spigot (plain end) for solvent cement installation into any standard 3/4" Schedule 40 or Schedule 80 PVC socket. The fitting consists of two components: a PVC flange stub with a formed face and a free-rotating PVC bolt ring. Because the bolt ring rotates independently around the flange stub, bolt holes can be aligned precisely with any mating flange, valve body, pump port, or equipment connection without twisting or repositioning the pipe — a practical advantage in tight installations where rotating the pipeline itself is not feasible.

The 856-007 mates to any standard 150 lb ANSI flat-face flanged connection and is typically assembled with a full-face rubber gasket and stainless steel or plastic bolts. The flat face and full-face gasket configuration distributes clamping load evenly across the flange face, which is the correct assembly method for PVC flanges — never use a raised-face steel flange mated directly to a PVC flat-face flange, as uneven clamping load can crack the PVC face. Torque flange bolts in a cross pattern to the manufacturer's recommended specification; do not overtighten, as excessive bolt load is a leading cause of PVC flange face failure.

Manufactured from heavy-wall Schedule 80 PVC, the 856-007 is suited for industrial, chemical, and process piping applications where flanged connections are required for equipment compatibility, future disassembly, or system isolation. The dark gray color is standard for Schedule 80 PVC. Apply a medium-bodied PVC primer and standard-bodied PVC cement per ASTM D2564 to the spigot end before installation.

Specifications:

Industries & Applications:

• Industrial Process Piping — Connects 3/4" Schedule 80 PVC process lines to flanged pumps, valves, strainers, and instrumentation in corrosion-resistant chemical and industrial fluid handling systems where flanged disconnection points are required.
• Chemical Processing & Water Treatment — Used at chemical metering pump ports, filter housing flanges, and treatment equipment inlets where a PVC flanged connection allows future equipment removal or line modification without cutting pipe.
• Municipal & Commercial Plumbing — Provides a flanged termination point on 3/4" Schedule 80 service lines at meters, isolation valves, and equipment connections in commercial and institutional plumbing systems.
• Irrigation & Agricultural Systems — Installed at pump flanges, filter manifold connections, and control equipment ports on 3/4" Schedule 80 PVC systems where bolted flanged connections are specified for serviceability.
• Pool & Spa Equipment Rooms — Transitions 3/4" Schedule 80 chemical feed or auxiliary piping to flanged connections at chemical dosing equipment, secondary pump ports, and treatment system manifolds.
• Laboratory & Semiconductor Facilities — Provides a flanged disconnect point in Schedule 80 PVC ultrapure water, acid waste, or reagent distribution systems where equipment must be periodically removed or replaced without disturbing cemented upstream piping.