Unvented Undersink Water Heaters. For D.I.Yers.

Oddly I've used the bread trick to do mods downstream of a stopcock that didn't quite live up to the task.  I did run the flame over the plugged part of the pipe as a last act, and what came out out of the taps resembled blackened crumbs of toast. Certainly an effective technique as a get out of jail card. Modern way is probably push fit, but I have an affinity for soldered joints.

I've also used a length of  earth sleeving pushed back up the pipe down the hole of a removed compression fitting on a  tap or similar to remove water,  either by blowing compressed air in, or better, where the geometry permitted, as a syphon. I've not tried to make an adaptor for the vacuum cleaner, but I imagine that may work as well.

Mike.

Oddly I've used the bread trick to do mods downstream of a stopcock that didn't quite live up to the task.  I did run the flame over the plugged part of the pipe as a last act, and what came out out of the taps resembled blackened crumbs of toast. Certainly an effective technique as a get out of jail card. Modern way is probably push fit, but I have an affinity for soldered joints.

I've also used a length of  earth sleeving pushed back up the pipe down the hole of a removed compression fitting on a  tap or similar to remove water,  either by blowing compressed air in, or better, where the geometry permitted, as a syphon. I've not tried to make an adaptor for the vacuum cleaner, but I imagine that may work as well.

Mike.