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Old 05-19-2010, 08:25 PM   #1
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Coring Through Block


I'm going to need to core through a basement block wall to below grade outside to run a sump pump discharge. It will be 2" PVC pipe. How do I core this hole, get something from the local tool rental, perhaps? Once I get the pipe through, how do I seal? Should I provide a larger sleeve? It will come out no more than 2' below grade on the exterior.

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Old 05-20-2010, 07:10 AM   #2
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You could buy a cheap hammer drill from Harbor Freight along with a set of bits . Draw a circle larger than you need and drill around it then hammer the insides out.. Install metal pipe sleeve bigger than the PVC.. then install the PVC and silicon all around the inside of the metal pipe keeping the PVC in the middle.. then silicon around the bigger pipe.

The sleeve is support for the blocks above it so it don't sink lower and ruin the integrity of the wall structure.

PS You can always resell the drill when your done with it.

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Old 05-20-2010, 10:10 AM   #3
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where does it go once outside. making a hole to below grade needs to be well thought out or you wont like the water intrusion problems
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Old 05-20-2010, 01:06 PM   #4
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Tool rental store will have what you need.
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Old 05-20-2010, 07:05 PM   #5
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we use a 2# hammer & brick chisel to cut thru an empty cell then patch w/mortar,,, just what we do,,, there's a bosch bulldog & carbide bits on the job, too,,, my guys just don't like to waste the time for some reason
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Old 05-20-2010, 07:31 PM   #6
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It is exposed in the basement and I'd like to end up with a nice professional looking job, so I'm probably going to look into a coring machine. I'll call the local permit office for a suggested detail. A neighbor paid $3000 or so to have a 2' hole dug for a pump and some 2" PVC piping run 20' I need to go see how it was done and duplicate it for less than $100. Plumbers are absolute criminals in the DC area. If I was a plumber any where in the nation, I'd come here and get in on this racket, $150K a year EASY.
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Old 05-20-2010, 08:03 PM   #7
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Quote:
Originally Posted by tpolk View Post
where does it go once outside. making a hole to below grade needs to be well thought out or you wont like the water intrusion problems
Renting the tool and drilling the hole is the easy part.

A collar on the inside to have a professional looking job is also easy.

What tpolk said is what should be your #1 concern.
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Last edited by kwikfishron; 05-20-2010 at 08:38 PM.
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Old 05-21-2010, 04:50 AM   #8
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COLLARS !!!!!!!!!!!!!! WOW, thanks ! hadn't thought about that - dab of caulk & escrutcheon plate = VOILA ! ! ! less time & cheaper than hydraulic &/or mortar,,, discharge can be on top of ground & let God take it away OR dig a dry well,,, sometimes we'll bury a discharge line to a creek/whatever.

wholesale, we pay $ 245/255 for sump, bolt on cover, zoeller m-53 pump, check valve, & 30' 1 1/2" foamcore pipe,,, don't be foolish & buy from an apron store,,, if you want pro results, use pro mtls.

waterproofing isn't plumbers ( licensed trade &, most often, union members ) work no matter how often they try to claim it,,, we're all still free to vote w/our wallets !

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