I might have found it!

I've had a water leak for most of the winter. Just too cold for me to dig it out. I have this line running from the house out to a hydrant for my water tank. Fortunately I haven't needed to use the tank. I just turn the water on long enough to fill a small tub in the other barn and turn it back off.

Now the weather is better I got started on it. I think I found the leak. First pic is the hole I'm working in. Second is the tee that's just under the hydrant. I had the hydrant drain wrapped by a tile so it could drain directly in to it. That tee was in the tile also. Took a while to realize there was a leak with that setup. Now I put a plastic line from the hydrant to the tile.


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That hole is about a 1/4". Sure don't take long to run up the electric bill $$$

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Here at work I needed a 90? 1/2" brass elbow. Pulled one out of the plumbers storeroom. Pretty as you please there is a pinhole casting right smack in the middle of the inside curved surface. I just took the plumbers torch and soldered the pin hole shut. Hasn't failed in over a year. Looking at your picture, don't you just love playing in the mud? As a kid I couldn't quite get how a hydrant worked. You shut it off and it peas into the ground? Then you find out there are a couple of lengths. I have seen really short maybe 3ft. long all the way to eight foot long up in a northern NY Hardware store. Wowsers! I know some of you folks can get a freeze six feet down. No thanks. Also Canada can have colder temperatures than the north pole. It was on the weather channel.
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You want to see black pipe problems just see what happens with some of the chine stuff. One inch buried black pipe that looked like a lawn sprinkler. Thing is there was some electric working on it. They were using it as a ground instead of a copper rod. Just a side story. A few years back 5he UP 844 engine had a couple of flies break off. Yes at full pressure! Look up this engineering analysis of what happened. Very interesting read.
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These are used in the suppression systems in the kitchens. Chrome plated. Very pretty. Makes you almost want to re plumb your toilet. :)
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Installed a couple hydrants in the yard a few years ago. 6? bury depth. Except where the line ran under the driveway, I went down to 8?.

Rural water main down the road froze and burst last year. Frost was down 7 feet.
 


You have to be sure that you have a good capacity sump under the bottom of the hydrant. I go down maybe two feet below where the bottom of the hydrant will be.
 
Back in the early 60 s dad installed a cattle waterer in the middle of the cattle yard and ran galvanized pipe to it. The pipe depth was whatever frost safe depth is here in northwest Iowa, maybe 4-5 deep. Three years later he was digging down by hand to repair leaks in the threads at the unions of the galvanized pipe. The manure acid in the soil ate through the pipe where the threads cut away the galvanizing. Next fall he had the galvanized pipe replaced with plastic. Problem solved.
 
Have to also make sure the worm in the hose clamp is stainless steel before putting them in. I have had the worm threads rust out then the clamp is loose and leaks. I now make sure they are stainless steel.
 
(quoted from post at 19:37:01 03/04/20) Have to also make sure the worm in the hose clamp is stainless steel before putting them in. I have had the worm threads rust out then the clamp is loose and leaks. I now make sure they are stainless steel.


2X checking the worm. I have ha them rust out as well.
 

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