Union (O-Ring Type), FPT x FPT PVC Schedule 80 2" (898-020)

The 2" PVC Schedule 80 O-Ring Union (Part No. 898-020) is a pressure-rated, gray-body fitting engineered to provide a fully demountable, hand-tightenable disconnect point within a Schedule 80 PVC piping system where both sides of the union connect via female pipe thread (FPT). The FPT x FPT configuration accepts male-threaded pipe ends, nipples, or fittings on both sides, making this union the correct specification for installing a serviceable break point anywhere along a fully threaded PVC run — without transitioning to a solvent-cemented connection on either side.

The FPT x FPT union occupies a specific and deliberate role in threaded PVC system design. Where a slip x slip union serves fully cemented runs and a slip x FPT union bridges the transition between cemented and threaded sections, the FPT x FPT union is the natural specification for systems built entirely on threaded connections — a configuration common in systems requiring frequent disassembly, installations where solvent cementing is impractical or undesirable, and applications where the entire piping assembly is designed to be broken down and reassembled periodically.

The o-ring sealing mechanism provides the reliable, repeatable seal that defines this union type over flat-face alternatives. A captured elastomeric o-ring compresses between the union body and coupling nut as the nut is tightened, maintaining seal integrity through repeated assembly and disassembly cycles without the gasket degradation concerns associated with flat-face unions in high-cycle service. This makes the 898-020 the preferred specification at pump connections, equipment isolation points, chemical dosing system interfaces, filter and strainer service access points, and any location on a threaded PVC system where the disconnect will be operated regularly by maintenance personnel.

The three-piece construction — body, tail piece, and coupling nut — allows the line to be broken and re-made at the union joint without disturbing the threaded pipe or fitting connections on either side. At 2", this union handles flow volumes typical of mid-scale industrial, commercial, and municipal systems while remaining manageable for single-technician service operations. The coupling nut is hand-tightenable in most applications, eliminating the need for pipe wrenches at the union face and reducing the risk of over-torquing the PVC body during routine maintenance.

Manufactured from Type I, Grade I PVC compound, this fitting conforms to ASTM D2467 dimensional standards and delivers the wall thickness and pressure ratings that define Schedule 80 over Schedule 40. Thread form on both ends conforms to ANSI B1.20.1 NPT.

Specifications:

Industries & Applications:

• Industrial & Chemical Processing — Serviceable disconnect points on fully threaded chemical-resistant PVC systems at pumps, filters, heat exchangers, and chemical dosing equipment where both sides of the break point arrive via male-threaded pipe or fittings
• Municipal Water & Wastewater — Isolation and maintenance access unions on 2" threaded treatment, metering, and distribution lines where a fully threaded disconnect is required for equipment service or system modification
• Commercial Plumbing — Equipment connections and service access points on threaded Schedule 80 commercial systems where a symmetric FPT x FPT union provides a demountable joint without introducing solvent-cemented connections into an otherwise fully threaded assembly
• Chemical Dosing & Water Treatment — Dosing pump connections, chemical feed line service points, and injector assemblies on fully threaded systems requiring frequent disconnection without disturbing surrounding pipe and fitting connections
• Irrigation — Pump and valve connections on threaded pressurized irrigation systems where the union provides a clean, repeatable service point between male-threaded equipment ports and threaded mainline pipe
• Mining & Oil Field — Corrosive fluid handling systems built on threaded PVC infrastructure requiring a durable, repeatedly serviceable disconnect point at equipment interfaces or maintenance access locations
• Aquaculture & Water Treatment — Filter housing, pump, and aeration equipment connections on recirculating systems where the fully threaded configuration is preferred for periodic system breakdown and reassembly