Manufacturers can do accelerated testing to predict life cycle if the product has not been around for 50 years, for example.

I think that sweat copper fittings which are properly installed will outlast press fittings. Lots of bad installs both ways, probably more bad sweat connections. That of course includes the opportunity costs of the different systems in labor. I didn't actually get into press fittings until I had to renovated an eight apartment manifolded water You don't have permission to access "http://www.homedepot.com/c/ab/copper-press-fittings-vs-solder/9ba683603be9fa5395fab9018c86136c" on this server. If you, as the hirer, refuel any equipment while it is in your possession, it must be with WHITE DIESEL.I have to admit opportunity cost is adding up in its favor. I hope I'm not creating and more problems for later albeit my experience with this cooper pipe system makes me wonder if the pipe can't last as long as the joining system whether fretting about the joining is as worth it as I thought. I think press fittings were designed as time savers, repair fittings, etc. They are also good if you need to get around hot permit work.

Some of these items can be returned to your nearest Screwfix store, other items require collection and you can do this by calling us on our freephone number 03330 112 112. Any press or grip fitting with just a small o-ring seal make you wonder. As new and stronger chemicals are being added to public water systems the O ring material needs to be compatible. Anyway, would a recirc pump generated enough flow on the closed system to trigger the hot water heater and any clever occupancy sensors (I'm even thinking a pushbutton to use a couple minutes before you want hot water).Even with balanced Ph, I wonder that some of the new water treatment chemicals used in public water treatment are going after copper when all conditions line up? I'm sure welded stainless steel pipe would outlast all of it under most conditions. But you don't want to pay for that.