Would like to sink about 20 feet down through sand to water my small
lawn (about 30 x 60). will use a single sprinkler and hose. Water table
is about 12 to 15 feet down.
What I have:
Have a 1/2 horse shallow well jet pump.
Have all pipe and couplings, check valve, etc.
An auger type post hole digger, but it's only 6 ft long.
Outside water faucet, city water.
4 horse air compressor with 60 gallon tank.
1/2 inch Milwaulkee electric drill.
Well point I have, new, stainless, 1-1/4 inch, but not a driving
Don't want to buy expensive one use tooling.
Do not have a welder, just a torch.
Need ideas, try to keep it cheap (
there are 2 things you need to find out.
1. what do you think the water flow rate is going to be at the 20 ft
depth/?into your bore hole?
2. how are you going to stop the sand filling in the borehole bottom?
and clogging your pump?
alsoyour going to need to prevent the sand collapsing into your bore
hole whilst drilling.
I dont think theres any cheap and easy way of doing what you want.
IF you can find some concrete rings say 3 ft dia, then you place one
on the ground, dig out the inside and it will sink down. then place
another on top and repeat.
youll need a short handled spade and a little person to do the digging
out. Also need fresh air pumped down to supply the digger.
the bottom ring has small holes in it to let the water seep in to
fill the resevoir.
you pump out say daily and let the water seep in till it finds its own
level.repeat as long as you have water coming in.
youll also need a lid if your well is 3ft dia to stop things ,animmals
etc falling in.
If you really have sand (not rocks), run a small pipe down the middle of
a bigger pipe (plastic is cheap, generally) and use the city water
(and/or air compressor) to power water (and/or air) down the inner pipe,
lifting sand and water in the space between the pipes. Pushing the pipe
down will be a wet and sandy experience. When you have the outer pipe to
desired depth, stop, withdraw inner pipe, add well point, send back down
hole. A ladder and/or reasonably short lengths of pipe will make this
easier, lacking a drill rig. In some soil types you might get away
without the outer pipe. In soil with rocks, you will find one and stop
In overly regulated areas, doing this without a well-drillers license
may be illegal, but often not for the first 25 feet. In other overly
regulated areas doing this (at all) may be illegal because the water
down there does not belong to you. I have no idea what laws apply to
wherever you are, hopefully you do.
What not to do.....
I've got the water table 6 meters below the surface. I've got 1200mm
diameter concrete well liners going down 5 meters. So the floor of the well
is about 1 meter above the water table. I want to have the pump intake at
least 3 meters below the water tables.
This afternoon I got a length of 4" UPVC storm water pipe and have it pushed
about 1 meter into the floor of the well. I put some 40mm UPVC down the 4"
pipe into the well "bed" and pumped a heap of water down it, hoping to
displace the nice coarse white sand up and out of the outer pipe. I hoped to
press down on the 4" pipe to sink it into the ground - it won't move an
I figure the next idea is to find a scrapped steel power utility pole 5" or
6" in diameter x 5m long and try to force that down using the same method,
hoping the weight of the pipe will assist in its descent......
Hopefully what ever method you chose will work better than my ideas!
Steve, at a much younger age (24) I dug a 26 foot hole with an auger type
post hole digger. It entailed adding 5 foot lengths of pipe to the auger
and having the strength to lift out the auger, 20 feet of extension and the
small dirt clump.
BTW, my cheap Sears auger had a reaming attachment so my final diameter was
almost 10 inches. The attachment was a simple steel adjustable bar sticking
out radially above the auger. You could clamp the bar at different
positions to vary the diameter.
After reaching depth, I dropped in a 20 foot length of 6 inch CMP
(corrugated metal pipe) into which I had torched numerous small holes so
water could enter. (could have drilled them just as easily). I paced the
remaining cavity around the pipe with open graded gravel. After attaching a
pump I was able to shoot about a 50 foot water stream out of a 3/4 inch
line. Never could exhaust the well. Did get the water tested because I was
curious. Had a slight level of ecoli, but plenty good for irrigation. Of
course, all of this was done on the sly, since our water district had strict
rules about developing your own supply. Today, in most parts of the
country, it is illegal to tap into the groundwater layer. To do this
legally, you must bypass the groundwater layer, drill further, and seal off
the groundwater from contaminating layers further down.
Good luck, very doable!!!
about 20 feet down through sand to water my small lawn
Out west, doing any sort of well development without the proper let
and permission from the water authorities can land you in court,
pronto. Every drop of rain has its owner written on it, until
recently, it was illegal in CO to have rain barrels for home use.