How to Run a Pipe Through a Concrete Block Wall

Written by c.l. rease
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To drill holes larger than one inch in diameter, use a core-drilling bit. A core-drilling bit has an open centre or a centre arbor that allows the concrete to enter inside the bit. There are core-drill bits available that you can insert into a hammer drill rather than renting and securing a core-drill to the wall.

Skill level:

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Things you need

  • Core-drill bit sized for your pipe
  • Hammer drill
  • Safety glasses
  • Ear protection
  • Work gloves
  • Hand pressurised water sprayer filled with water

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  1. 1

    Insert the core-drill bit into the hammer drill. Set the hammer drill on the rotary mode; you will not need the hammer option with the core bit.

  2. 2

    Put on the safety glasses, ear protection and work gloves.

  3. 3

    Pump the handle of the sprayer to pressure the water tank.

  4. 4

    Set the tip of the core-drill bit against the concrete block wall. Have a helper continually spray water where the tip of the drill bit intersects the wall throughout the drilling process, pumping the handle as necessary to maintain water pressure.

  5. 5

    Start drilling the hold while maintaining a firm grip on the hammer drill with both hands. (Larger diameter core-drill bits can grab strongly into concrete.)

  6. 6

    Keep the drill bit turning after you bore through the wall to back out the bit. Hold the bit level--there will be a core of concrete within the bit.

  7. 7

    Tilt the hammer drill toward the ground to remove the core from the bit.

  8. 8

    Clean the core-drill bit and hole in the concrete block hole by spraying them with water.

  9. 9

    Dispose of the concrete core that you removed from the core bit in Step 7.

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