Installing Irrigation Valves: Is Using "Double Unions" Really Overkill

In the world of irrigation system installation and maintenance, there is a debate that consistently divides professional contractors and hardcore DIYers: When installing new valves, is using "double unions" a brilliant future-proofing move, or is it just leak-prone overkill?

Recently, this exact question sparked a heated discussion in Reddit’s r/Irrigation community. Some argue it’s a lifesaver for future repairs, while seasoned veterans often scoff at the practice. Today, we are going to look at both sides of the aisle objectively and explore how choosing the right professional product—specifically a True Union Ball Valve or a Single Union Ball Valve—can perfectly resolve this industry standoff.

Why Do Professionals Call DIY Double Unions "Overkill"?

We don't shy away from the concerns of industry veterans. In the Reddit thread, irrigation specialists with decades of experience raised highly valid criticisms against piecing together a double-union setup. Their core arguments are grounded in real-world trench experience:

• Multiplying Potential Failure Points: The golden rule of plumbing is "fewer fittings mean fewer leaks." Forcing threaded adapters and separate unions onto a standard inline valve introduces 4 to 6 new potential weak spots for leaks to develop.
• The Trap of Cheap Fittings: Many homeowners grab standard Schedule 40 unions from big-box hardware stores. Under long-term water hammer impact or ground settling, the flanges on these cheaper unions are highly prone to cracking.
• The "Unnecessary Work" Dilemma: Veterans correctly point out that modern valve bodies rarely fail (unless exposed to freezing or heavy vehicle traffic). Furthermore, since union sizes and "lay lengths" vary by brand, a broken DIY union 10 years down the line might force you to cut the pipe anyway.

The Veteran's Verdict: Instead of risking leaks with cheap, pieced-together unions, it is safer to solvent-weld (slip) the PVC pipes directly into the valve.

Why Do Installers and DIYers Still Want Unions?

Despite the risks, the desire to "leave a backdoor for the future" remains strong for a reason:

• What if the valve body actually cracks from a hard freeze?
• What if you need to flush out stubborn debris from the mainline?
• What if you want to upgrade the system layout later?

With a solvent-welded system, your only option is to get into a muddy trench with a hacksaw, cut the pipe, and figure out how to bridge the new gap. With a high-quality union connection, you can simply unthread the nuts and slide the entire valve out in minutes. In fact, some Reddit users even suggested a hybrid approach: threading one side and using a union on the other.

The Breakthrough: Stop "Piecing it Together" and Choose True Union or Single Union Ball Valves

The core of the Reddit debate stems from people trying to create a removable system by frankensteining a standard valve together with aftermarket adapters and unions. That pieced-together approach is what causes the weak points.

In professional plumbing terminology, what DIYers call a "double union" setup is engineered flawlessly as a True Union Ball Valve. If you only need a union on one side, it is called a Single Union Ball Valve.

The answer to the debate is simple: Stop piecing parts together, and use an industrial-grade True Union Ball Valve from the start. This is exactly why the Jaro Industry JRV15 True Union Ball Valve was engineered.

Why the JRV15 is the Ultimate Solution to the Debate

The JRV15 doesn't treat unions as an afterthought or a bolt-on accessory; the unions are natively integrated into the valve body design. As shown in the exploded view below, this eliminates unnecessary joints and incorporates premium internal components to solve every pain point mentioned by the professionals.

• Ditching Schedule 40 for Industrial Strength: A top comment in the Reddit thread noted, "If you're going to use unions, shoot for Schedule 80." The JRV15 is manufactured with high-quality, industrial-grade materials (PVC/CPVC/PPH). Its integrated union nuts and robust valve body easily handle high pressure (up to PN16), eliminating the cracking risks associated with cheap hardware store unions.
• Zero "Frankenstein" Joints (Fewer Leaks): Because the union is part of the valve, you don't need additional male/female threaded adapters. By minimizing the overall number of fittings, the risk of leaks drops dramatically.
• True Non-Destructive Maintenance: Whether you are clearing a blockage or completely replacing the line, simply hand-loosen the two union nuts and the center valve block slides right out. No hacksaws, no damaged pipes, and no trench-digging required.
• Reliable Internal Sealing: Featuring premium EPDM/NBR O-rings and PTFE seats, the JRV15 offers exceptional internal sealing and smooth flow control.

Precise Dimensions for Professional Replacements

A major complaint from contractors is dealing with unpredictable "lay lengths" when a valve needs replacing. To support precise engineering and straightforward retrofitting, the JRV15 provides standardized dimensions across all sizes.

Conclusion: Make a Smart Investment, Not a Blind Compromise

Let's return to the original question: Is installing "double unions" overkill?

If you are buying a pile of cheap adapters from a local hardware store to patch together a DIY manifold, yes—it is likely overkill and will cause more harm than good.

But if you choose an intentionally designed, fully integrated solution like the Jaro Industry JRV15 True Union Ball Valve (or a Single Union Ball Valve depending on your layout), it is not overkill at all. It is the smartest, most efficient, and most professional choice you can make for the longevity of your system.

Do your future self (and your maintenance contractor) a massive favor. Visit our JRV15 True Union Ball Valve product page to explore the technical specifications and bring true industrial reliability to your next flow-control project.