Setting up a water butt for the garden

A water butt collects rainwater from a roof downpipe for use on the garden. Even a 200-litre butt can save significant water during summer — useful for watering, washing the car, or cleaning paths.

Choose a downpipe from your house, garage, or shed near your vegetable patch or garden area. The butt must sit on a raised stand or paving slabs to allow a watering can to fit under the tap — most stands raise the butt 300–400mm.

Fit the diverter kit: cut the downpipe at the correct height using a hacksaw (the kit instructions specify the cut point). Insert the diverter — when it rains, flow is redirected into the butt; when the butt is full, overflow returns through the diverter back down the pipe.

Drill an overflow hole near the top of the butt and fit the overflow pipe — direct this away from the house foundations. Ensure the butt has a tight-fitting lid to prevent mosquito breeding and keep water clean.

Position the butt on level ground or a purpose-made stand. A full 200-litre butt weighs 200kg — ensure the base is solid and stable. Fit the tap supplied: typically a ¾-inch brass tap with a rubber washer.

In winter, drain the butt completely to prevent ice cracking the container. Disconnect the diverter so the full downpipe flow continues to the drain. Store the butt upside down or inside if possible.