How to Install a Rain Barrel Spigot | A Tight, Leak-Free Fit

Installing a spigot is the step that turns a plain barrel into a working rain barrel, and most leaks trace back to one of two mistakes: a hole drilled in the wrong spot, or a fitting cranked down far too tight. The fix for both is straightforward—pick the right location, drill the size your kit specifies, and let the rubber do the sealing.

The steps below cover the common designs you’ll find on barrels sold in North America. The exact sequence varies by kit, so check whether yours uses a simple threaded spigot, a rubber-seal bulkhead connector, or a nut-and-washer assembly. Those parts are not interchangeable, so identify yours first.

Where to Place the Spigot on the Barrel

Set the spigot low for gravity-fed drainage, but give yourself room to work. Penn State Extension’s rain barrel construction guide recommends marking the hole around 10 inches from the bottom of the barrel.

If the barrel sits directly on the ground, you’ll want the spigot high enough to clear a watering can or a hose fitting. Several assembly guides suggest 1.5 to 2 inches above the ground for hand clearance. A firm, level base matters just as much—setting the barrel on cinder blocks with a patio stone on top gives you that clearance and makes the spigot easier to reach.

The Installation Steps That Work for Every Kit

Every reliable method follows the same skeleton: empty the barrel, drill the right hole, fit the seal, thread the spigot by hand, and test for leaks before regular use.

• Empty the barrel completely.
• Drill perpendicular to the wall at your marked spot. Hole size depends on your kit. Common sizes include a 1¼-inch hole saw for one construction guide, a 1⅜-inch or 35 mm bit in a DIY guide, and a 7/8-inch hole for one rain-barrel nipple system. Use the size your manufacturer specifies.
• Insert the seal or gasket per the kit design. Some fit from the outside of the barrel; others push through from the inside. A common bulkhead design has you insert a threaded rubber seal before threading in the connector.
• Thread the spigot in by hand. Wrap PTFE tape clockwise on threaded brass spigots where the kit calls for it, keep the fitting straight, and turn until the hex end meets the barrel. Hand-tight is the rule. One kit explicitly says to unscrew the nut, insert the spigot, and hand-tighten the inside nut only—do not use pliers.

One design instructs positioning the handle upward during installation and then pointing the spigot down once it’s seated in the seal. Another has you orient the spigot downward as you thread it in. Follow your kit’s orientation note; the goal is the same—a spigot that drains fully and doesn’t trap water.

Common Leak Points and How to Avoid Them

Over-tightening is the most common cause of leaks. The rubber seal does the work, not your arm strength. Multiple instructions repeat the same warning: turn until resistance, then stop. If the threads feel rough, one DIY guide suggests soapy water or hand lotion on the threads to reduce friction—then wipe it away before use.

Hole size is the second culprit. A hole too large won’t let the seal grip; a hole too small can tear the gasket as you force the fitting through. Measure your kit’s fitting before you drill, and use the manufacturer’s specified bit or hole saw rather than guessing.

When the spigot is in, fill the barrel and watch the joint for a few minutes before letting it sit. A slow drip usually means the seal isn’t seated evenly—loosen, reseat, and re-tighten by hand. If the leak persists, the hole may be the wrong size for the fitting.

If you’re comparing kits or replacement parts and want to see which spigots hold up best in practice, our roundup of the best rain barrel spigots covers tested options with the fittings that matter.

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