That woulld depend on the piping materials and local codes as copper TYPE L , K or M should not be threaded and plastic piping should NEVER be lead wiped to a brass ferrule and Cast Iron should not be glued
Personally I replace water pipe after I shut of the supply valve
What Plumbing pipes? Water or waste? What material is it? Copper? Galvanised? PVC? Brass? What size are the pipes in question?
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1. Replace the pipe, 2. Shut off the water
replace the water heater inlet pipe on the intake manifold on a 3800
You Don't .. You replace them
It is possible to replace by lowering tank and warming pipe in hot water.
That depends on what kind of pipe and also where it is ( in a wall, under ground, in a basement etc. ) More detailed explanation will get you an answer.
It's easier to find an exposed section of pipe and cut it out, remove sediment and replace pipe.
I cut out the offending part and replace it with an appropriate pipe and couplings. Patching is 'Mickey Mouse' and will not last.
Replace them with copper or plastic pipe.
Sure hot water heaters use them and they take the heat. However, this might not be up to building codes. Either check the building codes for your area, or be aware that you might have to replace it again in the future.
Chances are if you put a Pipe Wrench on the Pipe and turn it, you will damage the fitting that the Pipe screws into below ground. You should dig it up and use two Pipe Wrenches.
form_title=water main installation form_header=12223 How would you best describe the nature of the project?*= () Install new water pipe from home to street () Replace existing water pipe from home to street () Repair broken water pipe from home to street () Other () Don't Know "What is the reason for the sewer pipe installation, replacement or repair?"*= [] Reduced water pressure [] Reduced water volume [] Water detectable in yard [] Other