Ductile Iron Fittings

We offer a wide variety of DI fittings for pipes in many sizes– from ductile iron elbows to joint restraints to gaskets, couplers, reducers and tees. And we only offer the industry’s best – the strongest, the most durable, the easiest to install in or above ground and the most resistant to impact and corrosion.

When you’re looking for strong, dependable fittings for ductile iron pipes, you need the best balance of strength, durability and resistance to corrosion and impact. You also need ease of installation.
That’s why we offer only the best, from top brands like Harco, Romac and Underhill.

A leading developer of fittings made of ductile iron, Harco’s known for DI push-on joint fittings that stand up to the harshest real-world conditions. That’s because they offer the most substantial gaskets and deep socket bells to keep pipes securely seated in the fitting – even with pipe expansion and contraction.

Rated at 350 PSI, each Harco’s ductile iron pipe fitting offers 65,000 PSI tensile strength and a wall thickness of 0.31 inches. Ductile iron’s extreme strength and ability to absorb impact gives this fitting the ability to withstand the cyclical surges and mechanical stresses of golf course irrigation systems. This is especially critical for systems on the new computer controllers that are experiencing surges.

Harco - Ductile Iron IPS Swivel Joint Lateral Connection Swivel Tee

Lateral to main connections are now easy, quick and durable, with this ductile iron tee.  They’re also easy to seal and orient, unlike conventional NPT pipe joints.

This Harco swivel tee also features one distinctive size for male and female swivel joint connections, so all male swivel parts fit all female swivel parts. Use it on IPS-PVC pipe and steel pipe in below-ground water mains, irrigation systems and sewer force mains.

Harco – Ductile Iron IPS Repair Coupling – Knock-On

This pipe fitting of ductile iron is part of Harco’s celebrated “Knock-On” line of repair couplings. The best DI repair coupling available on the market today, its unique gasket design allows for travel in both directions, making it easier than ever to slide the coupling onto the repair section and back onto the existing pipe.

The square-face bell design allows for a larger object, such as a bar or wood block, to be placed against the fitting in order to knock the repair coupling into place.

All Harco repair couplings require no bolts, nothing to tighten to engage the gasket, no glue and no set time before backfilling can begin. As soon as it’s installed, you can immediately turn the water pressure back on.

Harco – 6" Ductile Iron IPS Fitting to Valve Joint Restraint

This ductile iron fitting to valve joint restraint allows you to install underground gasketed piping without the use of concrete thrust blocks. And it now has fewer parts and allows for easier installation of the grip rings and ductile iron restraint rods from the side. The restraint clamps the valve directly to the fitting and fits push-on valves for IPS-PVC pipe.

Harco pipe grip rings are machined to ensure sharp, consistent serrations and roundness. This allows perfect gripping of the pipe every time, so longevity and performance is guaranteed. Threaded, multiple restraint rods adjust to different dimensions and distribute force uniformly for even pull on the pipe and fitting. So, you don’t have to worry about “cocking” that can wreck pipes over time.