No Diggity - No Dig Trencher / Tunneler




Introduction: No Diggity - No Dig Trencher / Tunneler

A few years ago, I came up with a way to dig out a trench for a chicken watering system, using my shop vac.

Instructables: No Dig Garden Trench

I had another project where I wanted to move my water main into my garage, and needed to tunnel under slab to re-route the copper piping.

Nothing was made to do this ... Until NOW.


Step 1: Parts You Need... Not Many

  1. 6-8' of 2" PVC pipe
  2. 3 or 4 2" couplings
  3. Dremel tool
  4. Shop vac

All of the stuff I had left over from other projects, so my costs were minimal.


I needed to tunnel 7' under a 2" thick slab, but I could not use a normal trenching tool because my access space was only a 15 x 15 'box'. So I needed to think "OUT OF THE BOX" and this idea was born.

Step 2: Baby Shark, Do Do Do Do Do ...

Using the Dremel, I cut teeth into the PVC. The first piece doesn't need to be too long, only like 5-6"—just long enough to fit into the 2" coupling.

Step 3: Attaching the Shop Vac

Since the pipe is 2" and the shop vac is also almost 2" round, I used some black tape, just to make the connection snug, but not too snug, because you will be removing the vacuum hose a lot to remove larger stones.

Step 4: I'm Digging a Hole ...

Starting small, I started poking and turning the digger and the vacuum sucked up the dirt and occasional rock.

As I filled up the shop vac with dirt, I would empty it into a bucket to be used later as a back-fill.

I added couplings and more PVC pipe to keep extending it, as the hole got deeper.

(The white box marking was the point where I met the dig on the other side, so I had a guide how deep to dig.)

Step 5: The Finished Product

Well it's a HOLE ... :)

18" deep and 7' long.

Took me about 3 hours to complete the project.

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    2 years ago

    I am planning to build this, but using a 4" to 2" PVC reducer on one end with some flat metal "hurricane tie" strap for teeth. The idea is to cut the hole wide enough for post holes and still connect the top end into a shop vac.


    3 years ago

    I recently saw people digging fence post holes using a pressure cleaner to break up the ground and vacuum truck to suck it all out. Looks a lot faster, and supposedly makes a cleaner hole. I couldn't think of a way to do this at home, until now! Great idea, thanks for sharing it