1-1/4" Union (O-Ring Type), FPT x FPT PVC Schedule 40 (498-012)

The 498-012 is a 1-1/4" PVC Schedule 40 O-ring type union in an FPT x FPT (Female Pipe Thread x Female Pipe Thread) configuration, providing a tool-free, fully removable connection point in a 1-1/4" threaded PVC pipeline. Both ends accept standard 1-1/4" MPT fittings, nipples, or equipment connections, while the union body itself can be disconnected and reconnected at the slip nut without disturbing either threaded end — making this fitting the standard solution wherever a section of piping, a piece of equipment, or a valve assembly needs to be removed, serviced, or replaced without cutting into the line.

The O-ring sealing mechanism is what distinguishes this union from flat-face and threaded-joint alternatives. A captive elastomeric O-ring is compressed between the two union halves when the slip nut is tightened, producing a clean, consistent, and leak-free seal that requires no thread sealant, pipe dope, or cement at the union joint itself. The O-ring re-engages reliably each time the union is reassembled, and can be inspected and replaced independently if wear, compression set, or chemical degradation occurs over time — extending the working life of the union body through multiple service cycles.

The FPT x FPT configuration makes the 498-012 directly compatible with existing threaded piping, equipment ports, pump connections, valve assemblies, and other MPT-terminated components without additional adapters. PTFE thread tape or a compatible PVC-rated thread sealant should be applied to the male threads of all mating fittings at both ends before assembly. Avoid petroleum-based pipe dopes, which can degrade PVC over time. No sealant is needed at the union joint itself — the O-ring provides the seal when the slip nut is hand-tightened and snugged.

Schedule 40 PVC provides the pressure ratings and chemical resistance appropriate for the broad range of commercial, industrial, and irrigation applications this union serves — at a cost-effective wall thickness suited for systems where the higher pressure ratings of Schedule 80 are not required. The white color is the standard identifier for Schedule 40 PVC, distinguishing it clearly from gray Schedule 80 components in mixed systems.

Specifications:

Industries & Applications:

The 498-012 O-ring union is used wherever a threaded 1-1/4" PVC pipeline requires a reliable, easily operated disconnect point for maintenance, equipment service, or system reconfiguration:

• Irrigation & Agriculture — Disconnect points at pump stations, filter housings, pressure regulators, and zone valve assemblies in 1-1/4" pressurized irrigation mainlines, allowing seasonal removal and reinstallation of equipment without cutting pipe or breaking threaded joints
• Water & Wastewater Treatment — Serviceable union connections at chemical dosing pumps, metering equipment, UV units, and filter vessels in treatment plant piping where periodic equipment removal is required at threaded pipeline interfaces
• Commercial & Industrial Plumbing — Removable connections at water softeners, backflow preventers, pressure-reducing valves, and mechanical room equipment in commercial plumbing systems where maintenance access at threaded equipment connections is required
• Chemical Handling — Disconnect points in 1-1/4" chemical feed and distribution systems where pump heads, injectors, and inline instruments must be removed for cleaning, calibration, or replacement without disturbing the surrounding piping
• Pool & Spa — Union connections at pump and filter equipment in residential and commercial pool plumbing, allowing equipment removal for winterization, service, and replacement without cutting PVC lines
• Aquaculture & Aquatics — Serviceable connections at filter housings, UV sterilizers, and recirculating system equipment in 1-1/4" lines where frequent access for cleaning, maintenance, and component swaps is required
• General Industrial — Anywhere a reliable, repeatable disconnect point is needed in a 1-1/4" threaded Schedule 40 PVC system — isolation of instruments, inline sensors, flow meters, and other removable components where threaded union access is specified or preferred