depending on what area of the country you are in...16" should be safe enough. you should be careful of rock coming in contact with the piping as it could result in abrasive punctures over time.
Mostly wires and pipes for old houses
You can use pvc pipes in some applications,but copper is far better for household uses.It's not that expensive when you consider how well it does the job.
=== === By the way I doubt very seriously your using copper pipes your using copper TUBING
Electrolysis in plumbing affects the copper pipes used. If electrical wiring is installed too closely to copper water pipes, the electrical current running through the wiring charges to copper piping combined with the water and its properties causes electrolysis in the copper water pipes thereby weakening them.
Yes, Type K copper pipes can be buried. Type M or L should not be buried. Also note that it should be placed in CLEAN soil above and below the piping.
properly installed - yes
Copper pipes will last the longest. anonymous@oola.com
Copper is used as hot water pipes because the copper will not corrode when the hot water goes through the pipes
Copper is used as hot water pipes because the copper will not corrode when the hot water goes through the pipes
Copper 99%
Copper can be found in common household items. mainly jewelry.
No, copper is a metallic element.