K copper to pitless splice.

I have to splice in a short section of underground tubing between 3/4 k copper and a pitless. Is my best bet for a sound and worry free union sweating in a section of k copper with a coupling, or is there a more "bullet proof" approach that I can bury and not fret over?
Thanks

 

You have to silver solder under ground. They make fittings for this

 

quote; You have to silver solder under ground

That is underground AND inside a building

 

Why would you use copper when 160 or 200 psi poly is easier to work with, less expensive and will last forever?

 

The existing water service from pitless to pressure tank is 90' of copper. It's not a new install. Can't justify digging up 90' of driveway and lawn when I have a 8' section exposed and ready to repair.

 

Understandable

 

Would a pack joint coupling be the way to go?

 

Why did the previous connection fail?

 

Not sure. It was sound for 10 years and then began leaking. It's well below frost. There is substantial vibration from the submersible which may have worked on the connection.

 

Hard to believe the vibration would cause a sweat joint to break. But if you think that's the cause, I'd isolate the pitless from the copper with a section of poly.

 

No, the joint that failed is a pex to copper connection. It wasn't a sweat joint. I need to splice in a 7' length from the pitless to 3/4 k copper and wonder what is the most sound approach for underground. I'd like to continue with copper right to the pitless.

 

Do I need to know what a "pitless" is? I'm assuming we're not talking prunes and cherries here.

 

Sweat it in with silver solder

 

Pity-less maybe is the right phrase in this instance. Bad planning to have to run 90' of water line and fall a few feet short having to add any type connection.

 

A pitless adapter is a special fitting allowing a water pipe below the frost line to connect to the drop pipe in the water well. The fitting will have a means to allow the drop pipe to be raised up for maintenance and replaced back into place. This pitless carries the pressurized water.

 

Thanks. No frost line in my area. I can't relate.