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making a hole in concrete block

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Anonymous-0

Well-known Member
the holding tank for my spring water is made of cement blocks.i would like to raise the water level by making another hole 2 blocks higher for the overflow.that would give me more water storage whats the best way to make a hole through cement blocks.and the best way to seal it up around the 1-1/2 pvc pipe that will be used for the new overflow drain thanks RICK
 
masonry bit and hammer drill. regular drill work also, just slower. Drill as big as you can, then chisel to the right size. Chiseling will also let you fit the pipe snug enough to patch up with mortar

Dave
 
Can you leave one concrete block out and just fill that space in with some hand mixed concrete and you overflow tube? That would save time on drilling thru a concrete block.

Just a thought!!
 
i have poked some at the shop for some pipes. i put the pipe up aganst the wall, draw around it with a magic marker. then i used a 1/4 inch masonry bit and drilled a series of holes around the inside of the mark. keep em close together, then when you finish its pretty easy to knock the chunk out.
 
Get the right bit as big as you can fit in your drill ,chip out the rest of the way you will ruin any other bit...there is such thing as plumbers putty...Check with supplier for these items...I hope it all turns out well for you.....
 
As for the sealing the pipe I would get a tube of silicone caulking. I think that would work. Put plenty around the pipe on both sides of the block.
 
you have good answers below....but your thread makes me jealous. I grew up where nearly every house was fed by a spring somewhere up in the "holler" above. My GreatGrandfathers house had such a good spring that they never shut the water off in the kitchen, it ran full stream 24/7/365. Big old aluminum dipper hung on the curtain rod over the sink and it was always a treat to get an ice cold drink anytime of the year. that water was awesome. You don't miss small things like that till you don't have them anymore.
 
Concrete blocks are easy to drill because there's no big aggregate in them. You can use a masonry bit and a regular drill. A hammer drill will make it a little easier, but not much. If you don't have or want to buy a big bit, drill two smaller holes and use two pipes. There's an epoxy that's used to attach things to concrete that would probably be your best bet to seal your pipe.
 
If you are accustomed to it, star drill and hammer. Have made one inch holes with ball peen hammer on face. Course you hole inside would have to line up. Better use them masonry bits.
 
Buy or rent a core drill. Goto eBay for pricing of bits. They are diamond faced. They range from 1.5" diameter to over 12". They can drill solid or cored blocks and any thickness of poured concrete using extensions.
 
Something you might consider, is using an oxygen lance torch if the area in close proximity will allow it. It makes a nice round hole, but there is a lot of hot flame and sparks to deal with. Your local welding shop should know about them, as they are usually part of a welders training. The county emergency measures folks will no doubt have been trained in their use as well, and may appreciate the opportunity to refresh their training.
 
If you turn a 1/2 block side ways with the hole facing out, you can put your piece of PVC pipe thru the hole and fill around it with concrete.
 
Is it possible to put an elbow on the current overflow pipe? Turn it up with a length of pipe on it and you would be in buisness.
 
Just take an ordinary masonary bit and drill a circle of holes and make a circle then take a chisel and start chipping away .A concrete block is in reality pretty soft and easy to work with why spend lots of money renting a tool to make a couple of small holes in a 1.00 block .And to patch the holes in the other blocks every farm or home supply store sells a quick patch type of cememt that sets up UNDER water so you can do this real cheap and easy or spend lots of money and time chasing rentals and other things . And use the same sealer around the new pipe to seal it up as well , or mix up a bag of mortar and just fill the block full where the pipe goes thru .
 
The stuff that my son used to install a pipe in his cistern is called Speed Crete 5000. It is a 5000 PSI Mortar mix for high strength applications.
 
Thats a fast setting mix as well ,but this product is made by the company that also makes the good waterproof paint for basement balls , and we have painted the inside of cistrens to to stop them from leaking too .
 
(quoted from post at 03:57:09 02/23/09) the holding tank for my spring water is made of cement blocks.i would like to raise the water level by making another hole 2 blocks higher for the overflow.that would give me more water storage whats the best way to make a hole through cement blocks.and the best way to seal it up around the 1-1/2 pvc pipe that will be used for the new overflow drain thanks RICK
Click to expand...

I did exactly this on my tank: use a core bit to make a nice neat hole. Don't try to seal the plastic to the concrete, use an 1/1/2" tank connector with neoprene gasket inside. If you can't find a long enough connector, then I'd use silicon sealant. What I found a few years later was that the bottom cement blocks were deteriorating perhaps due to the extra head, or perhaps just age & acidic water. I replaced my block tank with a plastic one - piece of cake!
 
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