Female Adapter, Slip x FPT PVC Schedule 80 1-1/2" (835-015)

The 835-015 is a 1-1/2-inch Schedule 80 PVC female adapter with a slip (socket) connection on one end and a female pipe thread (FPT) connection on the other. A female adapter is a straight connection-type transition fitting — both ends are the same nominal size, and the fitting's sole function is to bridge a solvent weld PVC pipe run to a female NPT threaded port that accepts a male NPT fitting, valve stem, equipment nozzle, or threaded pipe directly. It is the foundational adapter for transitioning permanently routed Schedule 80 PVC pipe into the threaded portion of a piping system at any point where the connection type must change from solvent weld to threaded.

The slip end accepts standard 1-1/2-inch Schedule 80 PVC pipe for solvent weld assembly, creating a permanent, pressure-rated joint that becomes structurally integral to the pipe run. The FPT end provides a female NPT threaded port that can receive and release male NPT connections as many times as needed over the system's life — isolating valves, union nipples, equipment inlet fittings, instrument connections, and threaded pipe extensions can all be threaded in and out of the FPT end without disturbing the upstream solvent welded pipe run. This combination of a permanent solvent weld on one side and a serviceable threaded connection on the other is the defining operational advantage of any slip x FPT adapter.

It is important to distinguish the 835-series female adapter from the male adapter equivalent: the 835-015 FPT end receives a male NPT threaded fitting inserted into it, while a male adapter's MPT end inserts into a female threaded fitting or port. Selecting the correct adapter type requires knowing whether the mating equipment connection or fitting is male or female threaded — a female adapter mates with a male NPT connection; a male adapter mates with a female NPT port.

At 1-1/2 inches, the 835-015 is one of the most widely used adapter sizes in industrial PVC piping — 1-1/2-inch NPT is a near-universal connection size for pumps, valves, filter housings, chemical equipment, and pool and spa components, making this adapter a standard fitting on systems where Schedule 80 PVC pipe runs terminate at threaded equipment connections. Schedule 80 wall thickness provides the higher pressure rating and mechanical strength required for industrial chemical feed, process piping, and utility water systems. Gray PVC construction delivers broad chemical resistance to acids, alkalis, salts, and many industrial process fluids with no corrosion risk in continuously wet or chemically aggressive environments.

The slip end is manufactured and dimensioned to ASTM D2467 standards for Schedule 80 PVC socket fittings; the FPT end conforms to ASTM D2464 for Schedule 80 PVC threaded fittings. Thread form conforms to ANSI/ASME B1.20.1 for NPT compatibility across manufacturers.

Specifications:

Pressure rating is for water service at 73°F. Derate for elevated temperatures and aggressive chemical service per manufacturer guidelines. Use PTFE thread tape or appropriate thread sealant on all male NPT connections threading into the FPT end — do not overtighten male threaded fittings into PVC female threads.

Industries & Applications:

The 835-015 Schedule 80 female adapter is a standard transition fitting across industrial, commercial, and process piping wherever 1-1/2-inch Schedule 80 PVC pipe runs must terminate at or connect into male NPT threaded fittings, valves, or equipment:

• Pump Connections — Terminating 1-1/2-inch Schedule 80 PVC suction and discharge lines at pump body inlet and outlet ports where male NPT pump connections thread directly into the FPT end; one of the most common applications for this fitting size given the prevalence of 1-1/2-inch NPT pump body connections across centrifugal and positive displacement pump lines
• Chemical Processing & Water Treatment — Connection-type transitions on chemical feed, chlorination, acid dosing, and reagent distribution lines where the solvent welded Schedule 80 pipe run terminates at a threaded chemical equipment nozzle, metering pump inlet, or treatment skid port accepting a male NPT connection
• Valve & Isolation Assemblies — Adapter fittings ahead of threaded ball valves, gate valves, butterfly valves, and check valves where the upstream pipe run is solvent weld Schedule 80 and the valve body inlet is male NPT threaded; pairs naturally with a union nipple or close nipple on the valve body for serviceability
• Industrial Process Piping — Connection-type transitions on process headers, recirculation loops, and utility water lines at equipment connections, control valve inlets, and inline instrument housings where male NPT threaded connections interface with permanently routed Schedule 80 PVC pipe runs
• Filter & Strainer Connections — Terminating Schedule 80 PVC supply lines at filter housing and strainer body inlet and outlet ports where 1-1/2-inch male NPT nozzles are the standard equipment connection size across most filter and strainer manufacturers
• Swimming Pool & Aquatic Facility Plumbing — Transitioning Schedule 80 PVC pipe runs to 1-1/2-inch male NPT pump connections, heater inlet and outlet ports, chlorinator fittings, and filter head connections on commercial and residential pool and spa systems where Schedule 80 fittings are specified for their higher pressure ratings
• Municipal & Commercial Plumbing — Connection-type transitions on 1-1/2-inch Schedule 80 utility water and service lines at backflow preventer bodies, pressure reducing valve inlets, and mechanical equipment connections where male NPT threaded inlet ports require a female NPT adapter on the upstream pipe run
• Agricultural & Irrigation Systems — Pipe-to-equipment transitions on pressurized 1-1/2-inch Schedule 80 irrigation and pump discharge lines connecting to male NPT valve bodies, filter housings, and flow control equipment at system service and control points