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#74206 - 01/16/07 06:57 PM How do you get under a walk or drive?  
renosteinke  Offline
Cat Servant
Joined: Jan 2005
Posts: 5,316
Blue Collar Country
This pic, taken from another thread, shows the path a pipe takes:

[Linked Image]

This made me wonder ... how do YOU get the pipe under the walk? What tips / tricks work? Which don't?

Work Gear for Electricians and the Trades

#74207 - 01/16/07 07:08 PM Re: How do you get under a walk or drive?  
Tom H  Offline
Joined: Jan 2005
Posts: 74
Milford, Ct, USA
Actually did this just this fall.

Pipe needed was 1/2 rigid. Ran 3/4 to cover future.

Took 1st piece of 3/4, put coupling end with weather proof ko seal on it, wrapped in duct tape. Then proceeded to pound coupling end vertically under 4' walkway. The pounding started at 7" below grade, ended up 16 below grade. Cut off damaged end, threaded on new threads, and the rest is easy.

OK, had a laborer do the pounding, but still it was my idea...

#74208 - 01/16/07 07:14 PM Re: How do you get under a walk or drive?  
Luketrician  Offline
Joined: Jul 2006
Posts: 272
Sale Creek, TN USA
If the walkway was there first? Using a trencher to dig close as you can without damaging anything. Then use a Hilti TE 74 with especially fabbed chisel bit to drive a piece of 1" RMC under the walkpath. Then use the RMC as a sleeve for the pvc. I would think that you would be able to get the pvc stalks to bend enough so that the only factory or short radius ninetys in the run would be at the stub ups.

Luke Clarke
Electrical Planner for TVA.

#74209 - 01/16/07 07:35 PM Re: How do you get under a walk or drive?  
togol  Offline
Joined: Sep 2005
Posts: 421
yeah what Tom H said....about gettin someone else to beat on it.

actually I've done the same thing


#74210 - 01/16/07 07:48 PM Re: How do you get under a walk or drive?  
ITO  Offline
Joined: Nov 2006
Posts: 348
Water hose and a short of piece of EMT. It gets muddy but it works great.

101° Rx = + /_\

#74211 - 01/16/07 08:23 PM Re: How do you get under a walk or drive?  
ghost307  Offline
Joined: May 2005
Posts: 907
Chicago Illinois USA
I'm with ITO.
It works really quick, too.


#74212 - 01/16/07 08:29 PM Re: How do you get under a walk or drive?  
sparkync  Offline
Joined: Oct 2002
Posts: 826
Just had to do it the other day. I had
1- 1" pvc conduit and 2- 3/4" pvc conduits to run under a 4 ft. walk. I got a piece of 2" emt and flatened the end on it and proceeded to hit it with my sledge hammer. I would twist it ever so often with my big channel locks, so it wouldn't get stuck. Worked great. I thought I had hit a drain pipe close by when water started pouring out my hole, but come to find out it was just rain water that had collected under the walk [Linked Image] Steve...

#74213 - 01/16/07 08:36 PM Re: How do you get under a walk or drive?  
trublu832  Offline
Junior Member
Joined: Nov 2005
Posts: 7
Fort Wayne, IN, U.S.A.
I have actually had success with driving 3/4" pvc conduit under a 4' sidewalk (x3 actually) Just heated up the non bell end and flattened it to a wedge shape and hammered it through with a sledge hammer.

#74214 - 01/16/07 08:44 PM Re: How do you get under a walk or drive?  
LK  Offline
Joined: Jan 2003
Posts: 1,429
New Jersey
"Water hose and a short of piece of EMT. It gets muddy but it works great"

Yes this does work, and works well, only problem is it also weakens the walkway bed, and in no time at all, you get a call. my sidewalk cracked, where you installed the electric, what are you going to do about it, so that may of been the easiest method, but it was the most costly.

#74215 - 01/16/07 08:54 PM Re: How do you get under a walk or drive?  
Dnkldorf  Offline
Joined: Dec 2004
Posts: 1,064
nowhere usa
1/2" rigid, and use ground rod driver on Hilti.

Pound rigid end into a point with small slegde, drive under sidewalk.

Cut off end when on other side, thread or use rigid compression coupling.

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