4 mm Compact Hole Punch for Drip Tubing

This flat, key-shaped punch is a small tool for making individual drip outlet openings without bringing a drill to the planting bed. The textured black grip helps orient the pointed working end, and the round hole provides a convenient place to hang the tool between installation sessions.

Select the opening for your fitting

The nominal 4 mm measurement describes the opening, not the tube diameter or every fitting sold as quarter-inch tubing. Choose an emitter or barb whose installation instructions specify the same hole size. Use on compatible soft irrigation tubing; hard pipe, thick walls and brittle old tubing need a separate suitability check.

Prepare and make the opening

Lay out the tube and mark the plant positions first. Isolate the water supply and support the tube near the mark. Keep your fingers clear of the point, apply controlled pressure into one wall and stop once the opening is formed. Practise on a spare piece to check the feel and resulting fit before working on the installed line.

Finish the connection and care for the tool

Inspect the opening for tears, remove any loose material and flush the tubing. Push the emitter inlet straight into the prepared hole until its retaining shoulder seats. Check the outlet under normal operating pressure. Avoid repeatedly twisting the punch in the same opening: an oversized hole can weaken the seal even when the fitting appears seated.