Shurflo 244-3366 1/2 in NPT 90-Degree Swivel Fitting

The Shurflo 244-3366 is a nylon 90-degree swivel fitting built for the fresh water plumbing on your boat or RV. One end is a 1/2 inch-14 female NPT inlet, the other is a 1/2 inch-14 male NPT outlet, and the wingnut swivel body lets you turn a corner right at the pump or the tank without fighting the hose. It's a small part that solves a real problem, getting a clean 90-degree turn in a tight bay without kinking a line or cross-threading a port.

If you've ever tried to route fresh water line off a demand pump that sits flush against a bulkhead, you know the trouble. A straight connection forces the hose into a hard bend the second it leaves the port, and that bend is where lines kink and flow drops off. This elbow takes the turn for you. It threads into a 1/2 inch NPT female port, and the male NPT outlet gives you a standard pipe thread to carry on to the next fitting, a shutoff valve, or an accumulator tank.

The wingnut swivel is the part most boaters appreciate. You start the thread by hand, then snug it down with the molded wings, no wrench needed in a cramped locker. Because the body swivels on the inlet, you can orient the outlet exactly where you want it to point and then tighten without the whole fitting winding your hose around with it. That matters when you're working one-handed under a galley sink or behind a water heater where there's barely room for your knuckles.

It's molded from nylon, so it won't corrode the way a plated metal fitting can in a damp bilge or a salt-air locker. Nylon also keeps the weight down and won't gall the threads on a plastic pump housing, which is exactly what you want when the port you're threading into is also plastic. For cold fresh water work, pump outlets, city-water inlets, winterizing bypass lines, it does the job and stays put season after season.

One thing worth knowing about NPT fittings in general, the threads are tapered, so they seal on the threads themselves rather than on a flat face or an O-ring. That's why the tape matters and why you tighten to a firm feel, not to a hard stop. A turn or two past hand-tight on the male end is usually plenty for a leak-free fresh water seal.

Installation is straightforward. Wrap the male NPT threads with a couple of turns of PTFE tape, thread the female end onto the pump port, orient the outlet where you need it, and snug the wingnut by hand. Don't over-torque it. Nylon threads seat firmly without much muscle, and cranking on them is how you crack a fitting or strip a thread. If you feel resistance early, back it out and start again rather than forcing a cross-thread.

A couple of honest notes before you order. This is a 1/2 inch-14 NPT fitting on both ends, female in and male out, so it's made for standard pipe-thread connections, not a direct push onto a bare hose. If your run needs a barbed hose tail, you'll add that fitting downstream of the male outlet. And it's rated for fresh cold water systems only. Keep it off fuel lines and hot process plumbing.

It's sold as a single fitting. Honestly, it's the kind of part worth keeping two of in the spares bin, because the day a pump swap goes sideways in a marina slip is the day you'll wish you had a spare elbow already aboard. At this price, stashing a backup is easy insurance against a dry tank and a long walk to the parts store.