6 Pipe Hole Saws for Routing New Supply Lines

Whether routing a new water line for an upgraded refrigerator or extending a sink drain to a utility room, the right hole saw makes the difference between a five-minute task and a frustrating afternoon. Selecting a tool that matches the material—be it soft drywall or stubborn structural studs—prevents damage to the home’s infrastructure. This guide evaluates six reliable options to ensure plumbing projects remain manageable, clean, and professional.

Milwaukee Hole Dozer Kit: For All-Around Use

For households tackling occasional plumbing upgrades or furniture modifications, the Milwaukee Hole Dozer kit serves as the reliable standard. The tooth geometry is designed to resist premature dulling, which is critical when drilling through hidden nails or dense wood framing.

Storage remains a primary benefit of this system, as the compact carrying case fits easily into a crowded garage shelf or under a utility sink. While the price point reflects a premium tool, the durability ensures it will likely be the last kit purchased for many years.

Bottom line: Choose this kit for its versatility across various household materials and its ability to withstand accidental contact with metal fasteners.

DeWalt Bi-Metal Set: Best for Faster Cutting

When a project requires drilling through multiple joists to run a supply line across a basement or crawlspace, speed becomes a priority. The DeWalt bi-metal set utilizes aggressive tooth designs that penetrate wood surfaces rapidly, minimizing the time spent in awkward positions.

This speed does not come at the expense of control, provided the drill is kept perpendicular to the surface. For homeowners who value efficiency and want to complete plumbing repairs during a lunch hour, this set provides the necessary bite to get the job done quickly.

Bottom line: Opt for this set if the priority is completing the task efficiently without sacrificing the integrity of the surrounding wood.

Lenox Speed Slot Hole Saw: For Tough Materials

Older homes often feature harder woods like oak or dense pine, which can stall lesser-quality hole saws. The Lenox Speed Slot system features a unique stair-step design that assists in prying the cut material away from the edges.

This feature is particularly helpful for deep cuts where wood shavings usually become compacted and difficult to remove. Investing in this brand pays off when working with denser materials that would otherwise cause standard saws to overheat or bind.

Bottom line: Select this model when drilling through hardwoods or aged timber where standard bi-metal teeth might struggle.

Klein Tools Bi-Metal Saw: Easy Plug Removal

The most annoying part of using a hole saw is often digging the wooden plug out of the cylinder after a cut. Klein Tools incorporates a design specifically intended to make plug ejection effortless, which saves time and prevents bruised knuckles.

This focus on usability makes it an excellent choice for homeowners who may not use these tools daily and prefer a frustration-free experience. The construction is robust enough for residential plumbing, and the ease of use encourages tackling smaller, multi-hole projects without hesitation.

Bottom line: Buy Klein if the primary goal is minimizing physical strain and avoiding the hassle of stuck debris.

Diablo Snap-Lock Plus: For Quick Size Changes

Modern plumbing projects often require switching between a small pilot hole for a supply line and a larger hole for a drain pipe. The Diablo Snap-Lock Plus system allows for near-instant size changes without the need for additional tools or complex chuck adjustments.

This convenience is ideal for those who maintain a small, organized tool kit rather than a massive tool chest. While the mechanism is slightly more complex than a standard mandrel, the time saved during a multi-stage plumbing project is significant.

Bottom line: Use this system if the workflow involves frequent changes between different pipe diameters.

Spyder TCT Hole Saw: Cleaner Holes in Wood

Carbide-tipped (TCT) hole saws like the Spyder provide a surgical cut, leaving edges that are remarkably smooth compared to traditional bi-metal options. This is essential when drilling through exposed cabinetry where a jagged hole would be visible and unsightly.

Because they cut cleaner, they also reduce the risk of splintering veneer or decorative wood trim. While these are typically more expensive, the quality of the finish often justifies the cost in high-visibility areas of the home.

Bottom line: Choose TCT saws for visible installations where aesthetics are just as important as structural access.

Choosing the Right Size for Common Pipe Types

Correct sizing prevents leaks and structural instability. For standard 1/2-inch copper or PEX supply lines, a 7/8-inch or 1-inch hole saw is typically sufficient to allow for movement and thermal expansion.

When working with 1-1/2-inch PVC drain lines, a 2-inch hole saw provides the necessary clearance to feed the pipe through floor joists. Always account for the exterior diameter of the pipe, not just the nominal size, by using calipers or checking the manufacturer’s pipe specifications before making the cut.

• 1/2-inch Supply: 7/8-inch or 1-inch hole.
• 3/4-inch Supply: 1-1/8-inch or 1-1/4-inch hole.
• 1-1/2-inch Drain: 2-inch hole.

Bi-Metal vs. Carbide: Which Saw Do You Need?

Bi-metal hole saws are the workhorses of the household, blending high-speed steel for the cutting edge with a flexible backing. They are perfect for general-purpose wood and metal drilling at a lower cost point.

Carbide-tipped saws, however, are significantly harder and retain their edge far longer than bi-metal counterparts. They are the preferred choice for abrasive materials like fiber cement siding or hardened hardwoods, though they are more prone to chipping if dropped on a concrete floor.

Bottom line: Stick with bi-metal for general household DIY, but keep a carbide-tipped saw on hand for specific, tough-material tasks.

Tips for Cutting Straight, Clean Holes Every Time

A drill guide is a small, inexpensive accessory that keeps the bit centered and perpendicular to the wall. Without a guide, it is easy to “walk” the hole saw, resulting in an oval-shaped hole that compromises the tight seal of a pipe escutcheon plate.

Always clear the wood shavings frequently during deep cuts to prevent heat buildup, which is the primary cause of saw failure. Use a slow, consistent drill speed rather than high torque, as this prevents the saw from jumping and damaging the finished surface.

Do You Really Need a Full Hole Saw Kit?

For the average homeowner, purchasing a massive 15-piece set is often unnecessary, as most plumbing involves only three or four specific diameters. Buying individual, high-quality hole saws in the sizes most commonly used in the local area is often a smarter, more cost-effective approach.

Evaluate the specific pipes in the house before shopping. If the home has mostly PEX and copper, three carefully chosen sizes will handle 90% of all future repairs, leaving more budget for quality drill bits and accessories.

Bottom line: Prioritize quality over quantity by purchasing individual sizes that match the household’s actual plumbing needs.

Selecting the right hole saw empowers homeowners to handle plumbing maintenance with confidence and precision. By focusing on the specific materials and diameters encountered in the home, you can build a reliable collection that simplifies future projects rather than complicating them. Taking the time to choose the right tool ensures that every supply line remains secure and every wall remains pristine.