90 Degree Elbow, Slip x FPT PVC Schedule 40 4" (407-040)

The 4" PVC Schedule 40 90 Degree Elbow Slip x FPT (407-040) delivers a full quarter-turn directional change in Schedule 40 PVC piping systems while simultaneously transitioning from a solvent-weld pipe connection on the inlet to a female-threaded outlet—combining a directional fitting and a connection-type transition in a single component. Manufactured from rigid white PVC conforming to ASTM D1785, this elbow is built to the dimensional and pressure standards expected in commercial, municipal, and industrial Schedule 40 PVC pressure piping.

The slip (socket) inlet accepts standard Schedule 40 or Schedule 80 PVC pipe via solvent cement, creating a permanent, pressure-rated connection integral to the pipe wall on the incoming run. The outlet is machined with a 4" FPT (female pipe thread) connection conforming to NPT standards, accepting a 4" male-threaded fitting, valve, nipple, or equipment connection directly—without requiring a separate threaded adapter at the turn. This hybrid slip-inlet, threaded-outlet configuration is the core value of the 407-series: it eliminates one fitting from the assembly at any location where a 90-degree turn and a transition to a threaded connection must occur in the same physical space.

This combination is particularly useful at equipment termination points where a solvent-weld pipe run must turn 90 degrees and connect to a threaded pump inlet, valve body, tank fitting, or instrument port. Rather than running a straight 90° slip elbow and then adding a threaded adapter on the outlet, the 407-040 handles both functions in one fitting—reducing fitting count, eliminating one solvent-weld or threaded joint, and producing a more compact, lower-leak-point assembly at the equipment interface.

The FPT outlet also provides a degree of future serviceability that a fully solvent-welded run cannot. A male-threaded nipple or fitting threaded into the FPT outlet can be removed and replaced without disturbing the solvent-welded pipe run feeding the elbow—a useful characteristic at pump connections and equipment interfaces where the threaded component may need to be serviced, replaced, or reconfigured independently of the fixed piping system.

At 4", this elbow is well-suited for pump station discharge and suction piping, irrigation mainline equipment connections, large-diameter commercial plumbing terminations, and any Schedule 40 application where a 4" solvent-weld run must execute a 90-degree turn and terminate or connect at a threaded equipment interface. White PVC provides broad chemical resistance to acids, bases, salts, and a wide range of municipal and commercial process fluids. For higher-pressure service or more aggressive chemical exposure, refer to the Schedule 80 equivalent. For service temperatures above 140°F, consult CPVC alternatives.

Specifications:

Industries & Applications:

• Water & Wastewater Treatment — Pump suction and discharge piping terminations where a 4" solvent-weld main must turn 90 degrees and connect to a threaded pump inlet, valve body, or equipment port at pump stations and treatment facilities
• Irrigation & Agriculture — Mainline equipment connection elbows on 4" commercial and agricultural irrigation pump stations, filter heads, and zone control valve inlets where the slip inlet and FPT outlet eliminate a separate adapter fitting at the equipment interface
• Municipal Infrastructure — Water distribution, reclaimed water, and drainage system directional changes terminating at threaded valves, meters, or service equipment connections on 4" Schedule 40 mains
• Commercial Plumbing — Large-diameter commercial pressure piping 90-degree turns at threaded equipment connections, riser terminations, and mechanical room equipment interfaces where a combined directional-and-transition fitting reduces assembly complexity
• Industrial Manufacturing — Process fluid distribution headers requiring a 90-degree turn and simultaneous transition to a threaded equipment connection, valve, or instrument at the end of a Schedule 40 solvent-weld run
• Fire Protection & Site Utilities — PVC-permitted large-diameter utility system directional changes terminating at threaded valves, backflow preventers, or metering equipment
• Aquaculture & Aquatics — Recirculating system supply and return main 90-degree turns at threaded pump inlets, filter heads, and equipment connections where the combined slip x FPT elbow minimizes fitting count in compact mechanical spaces