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My backyard has existing copper pipes outside that I want to reroute. To keep like with like, I'll just continue using copper. Are there any considerations or special types that I need to be aware of? Specifically, is there a special type of pipe that is better suited for outside conditions.
No snow or freezing temps here.
If this is outdoors and possibly underground, understand that there are two types of hard copper pipe (as opposed to soft tubing); type L and type M. Both have the same external diameter so they both use the same fittings, but type M has thinner walls. It is for use where the pipe is going to be somewhat protected, as inside of a stud wall in a building. Type L has thicker walls so the inside diameter is slightly smaller, but it is much more resistant to accidental puncture and will last longer in terms of corrosion when in direct contact with soil. Some jurisdictions require that you use type L outdoors, so it's just better to go that way.
For copper: A quality torch helps to solder. Propane works, but I like MAPP gas--it's better with non-lead solders.
Pipe is rigid and goes by inside diameter. Tubing is soft can be bent and goes by outside diameter. 1/2” pipe and tubing will not fit together without adapters.
Make sure to use non lead solder and flux that is made for potable water.
Last, prior to soldering clean the outside of the pipe inside of the couplers , or fittings with a fine sandpaper or plumbers abrasive cloth to remove the varnish.
A tip: if your pipe has water in it the water will vaporize and cause leaks. Take some white bread remove the crust and stuff the bread in the side that had water. Once fully assembled remove any aerators and flow water to remove the bread.
