It may seem like a silly question, but how do you know a soldered joint it good enough to be water tight?
I've done everything right, I've cut, de-burred, cleaned, fluxed and soldered but is there any sort of tool I'm missing to do that last check before putting water into the joint? It would save a lot of bother drying out the section and going through the hassle all over again.
I'm able to check smaller sections of pipe I've soldered together by capping one end then blowing air into them, it's a two man job for larger more awkward bent pipes, but I'm wondering is there any sort of tool that plugs into the end of a pipe and does a pressure test? Something simple like low pressure air (~2 bar) and a gauge would do the job to show it's not leaking.
Maybe I'm thinking out loud here, but what do the tradesmen do to test?