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What you need
A cordless drill is suitable for making holes in PVC pipe for irrigation, drainage, brackets, or cable routing. PVC is soft, so you do not need a hammer drill or a high-powered tool. A basic drill with a variable-speed trigger, a sharp bit, and a way to hold the pipe securely will do the job.
Choose a bit based on the hole diameter and the pipe wall thickness. A standard twist bit works for small holes; a hole saw is more useful for larger openings. For a large or especially clean hole, consider a step bit if its cutting range covers the diameter you need. A variable-speed cordless drill is a sensible all-purpose choice, but if you already own one, there is no reason to buy a new drill just for PVC.
Also gather a marker, tape measure, clamp or padded vise, and safety glasses. A deburring tool or utility knife can tidy the cut edge afterward. Check that the pipe is empty and disconnected before drilling. Do not drill into a pressurized water line or a pipe that may contain electrical wiring, gas, or hazardous material.
Choose the right bit
Match the bit to the finished hole, not just the drill chuck. Most household cordless drills accept bits with a 1/4-inch hex shank or a round shank up to 3/8 or 1/2 inch, depending on the model. A large hole saw may need a 1/2-inch chuck and a drill with enough torque to turn it safely.
| Bit type | Best for | Trade-off |
|---|---|---|
| Twist bit | Small holes, roughly 1/8 to 1/2 inch | Inexpensive and widely available; can grab as it breaks through thin pipe. |
| Step bit | Clean, round holes in a range of sizes, often up to about 1 inch | Convenient for several diameters, but check its size range and use in plastic. |
| Hole saw | Larger openings, such as for a pipe fitting or cable pass-through | Fast on big holes, but creates more torque and can catch or chatter. |
A sharp general-purpose twist bit is usually fine for a small hole. For repeated work or a finish where ragged edges matter, a bit intended for plastic may cut more cleanly, but it is not essential for an occasional hole. Avoid using a hammer setting: the repeated blows can crack or damage the pipe.
Secure and mark the pipe
Measure the hole location and mark it clearly. If the hole must line up with a fitting or a second pipe, measure from the same reference point on both parts. On a round pipe, a strip of masking tape over the mark can help the bit start without skating. Mark the center on the tape.
Clamp the pipe so it cannot roll, but do not crush it. Use padded jaws or a folded cloth between the pipe and the clamp. For a short section, a helper can hold it steady, but hands should stay well away from the bit and the pipe should still be supported against rotation. Do not try to hold a loose pipe between your feet while drilling.
If you are drilling near the end of a pipe, leave enough material around the hole to avoid splitting. The right margin depends on the pipe size and intended load; for a structural attachment, follow the fitting or project instructions rather than guessing. PVC pipe is not a substitute for a structural support.
Drill the hole
Put the drill in its low-speed range if it has a two-speed gearbox. Hold it square to the pipe, start the bit slowly, and increase speed only when it has a stable bite. Use light, steady pressure. PVC cuts easily; forcing the bit can make it grab, melt the plastic, or leave a rough opening. If the pipe or bit begins to heat up, stop and let it cool.
For a twist bit, ease up as the point approaches the far side of the pipe wall. The bit can break through suddenly and catch the opposite wall, especially in thin-walled pipe. Keep a firm two-handed grip on the drill and keep the work clamped. If you are drilling a large hole with a hole saw, make sure the pilot bit is centered and keep the drill straight. Stop if the saw binds; release the trigger, let it come to a full stop, then clear the cuttings before continuing.
In thin-wall PVC, drilling both sides in one pass may leave a ragged exit. One option is to drill through the first wall, then reposition the bit from the other side using the first opening as a guide. For a large hole, make sure you know whether the project calls for a hole through one wall or all the way through the pipe.
Clean up and check the hole
Remove loose shavings and inspect both sides of the hole. Trim small burrs with a deburring tool or carefully with a utility knife, cutting away from your hand. Do not enlarge the hole while deburring unless the fitting requires it. A rough edge can snag a cable or prevent a washer from seating flat.
If the pipe is part of a water system, follow the fitting manufacturer’s instructions for the hole size, sealing method, and required distance from an end or joint. A drilled hole by itself is not a reliable connection. Check for leaks at low pressure before returning the line to normal service.
For several holes in the same pipe, measure and mark every location before drilling. A simple drilling guide or a scrap block with a correctly sized pilot hole can help repeat placement, but it must be secured so it cannot shift. For a one-off hole, careful marking and clamping are generally enough.
Common mistakes to avoid
Using a hammer drill is unnecessary and can damage PVC. Running a bit at full speed with heavy pressure can produce heat and melted plastic rather than a clean cut. An unrestrained pipe can roll or spin when the bit catches, and a large hole saw can twist the drill suddenly. Use a clamp, keep the drill aligned, and stop rather than forcing a binding bit.
For occasional small holes, the inexpensive bit you already own is usually adequate. Buy a step bit or hole saw only when the hole size or finish calls for it, and check the cutting diameter before ordering. A PVC deburring tool is useful if you regularly cut pipe; for one or two holes, careful cleanup with an appropriate hand tool is enough.