Best Water Butt Connectors and Diverters

Connecting a rain barrel to your downspout should be a ten-minute job — but the fitting that joins them is where most rain-harvesting setups fail. Cheap diverters leak, connectors split in winter, and barrels overflow because the diverter is sized wrong. The good news is that the category is full of proven parts, and the right combination turns a downspout into a reliable free water supply for the garden. Here are the connectors and diverters that hold up, based on specs and owner feedback.

At a Glance

• Top Pick: Amerimax downspout diverter — the dependable, widely stocked kit that connects a barrel to a standard downspout.
• Best Value: RTS Home Accents rain barrel diverter kit — an affordable all-in-one that includes the hose and fittings.
• Best for Flexible Runs: NDS Link-It downspout extension — for directing water away from foundations or into a barrel across a gap.

Understanding the Parts

A rain barrel system has three jobs: capture water from the downspout (the diverter), move it into the barrel (the connector and hose), and overflow safely (the overflow fitting). The diverter is the piece that most people get wrong. Two types dominate: the direct-fit diverter, which replaces a section of downspout and feeds the barrel through a hose, and the elbow/extension diverter, which redirects the whole downspout into the barrel opening. Each suits a different downspout layout.

Top Pick: Amerimax Downspout Diverter

Amerimax is one of the most established gutter and downspout brands in North America, and their diverter kit is the standard recommendation in gardening forums. It installs directly into a standard 2×3 or 3×4-inch downspout — you cut a section, snap in the diverter, and connect the barrel with the included hose. Owners consistently report a clean, leak-free fit and easy winter removal. It also includes an overflow feature to direct excess water away when the barrel is full.

Pros: trusted brand, clean installation, includes overflow hose, easy to remove for winter.

Cons: needs a downspout section to cut; check your downspout size before ordering.

Best Value: RTS Home Accents Rain Barrel Diverter Kit

RTS Home Accents makes a simple, affordable diverter kit that covers most of what you need out of the box: the diverter, a hose, and fittings to reach a nearby barrel. It is the pick for a first-time rain barrel setup, and owner reviews praise how quickly it installs. Like most mid-range diverters, it works best with round downspouts or with an adapter for rectangular ones — confirm the shape before you buy.

Pros: low price, complete kit, fast install, good for beginners.

Cons: lighter-duty plastic; may need adapters for some downspout shapes.

Best for Flexible Runs: NDS Link-It Downspout Extension

Sometimes the downspout does not sit right next to the barrel, or you want to route water around a corner. NDS Link-It is the modular downspout extension system that snaps together to carry water from the downspout to the barrel inlet — or away from the foundation when the barrel is full. It is widely used for drainage projects, and the pieces are sturdy, UV-resistant, and easy to reconfigure.

Pros: modular and adjustable, sturdy build, solves awkward layouts.

Cons: you are building a water path, not a sealed connector — pair it with a barrel inlet cover to keep mosquitoes out.

Beyond the Diverter: The Rest of the Setup

• Barrel inlet cover or screen: keeps leaves, mosquitoes, and debris out of the stored water.
• Overflow kit: a barbed fitting and hose at the top of the barrel that routes excess water away from the foundation.
• Spigot and hose adapter: brass spigots last far longer than plastic ones; a hose adapter lets you feed a watering can or drip system directly.
• A sturdy stand: raising the barrel 30–60 cm (12–24 inches) gives gravity enough pressure for a hose and makes the spigot usable.

The rain barrel guide covers the full system, from placement to winterizing, and the drip irrigation guide explains how to feed a garden from stored rainwater.

Common Installation Mistakes

• Not checking downspout size and shape before buying — round vs. rectangular matters.
• Forgetting the overflow. A barrel without an overflow floods its base and the foundation when full.
• Skipping the screen. An open barrel becomes a mosquito nursery within days.
• Leaving the system up over winter. Ice cracks fittings and hoses; drain and store them.
• Placing the barrel on bare soil. The weight can settle and tilt it; put it on pavers or a stand.

Check Current Prices on Amazon

Amerimax diverters on Amazon · Rain barrel diverter kits on Amazon · NDS Link-It on Amazon · Overflow kits and screens on Amazon

FAQ

Will a diverter work with any downspout?

Most kits fit standard 2×3-inch rectangular or round downspouts, but not both out of the box. Measure your downspout, then choose a kit that matches, or buy the right adapter. Amerimax offers versions for both shapes.

Why does my barrel overflow even with a diverter?

Because the barrel is full — the diverter is doing its job. The real fix is a proper overflow kit that routes excess water away from the foundation, so a full barrel is never a problem.

How do I winterize my rain barrel setup?

Drain the barrel completely, disconnect the diverter and hoses, and store them indoors if possible. Remove the spigot or leave it open so nothing freezes with water inside. Many gardeners flip the barrel over or move it under cover for the season.

Can I connect two barrels together?

Yes. Use a short hose or a connector kit between the barrels at the top so they fill evenly, and give each barrel its own overflow. This is the standard way to double your storage without a bigger tank.

Bottom Line

A good diverter is the difference between a rain barrel you actually use and one that leaks or overflows all season. Amerimax is the dependable top pick for a direct-fit install, RTS Home Accents covers a basic setup on a budget, and NDS Link-It solves awkward layouts. Add a screen, an overflow kit, and a brass spigot, and your downspout becomes a reliable watering partner for the whole garden.

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