The pump threads onto that and there is a gasket between the two. Yeah i already had ball valves in place on both sides, the pump is out and i unsoldered one fitting and unthreaded the other. I was hoping i could get just a mounting flange so I don't have to more than likely drain the hot water heater as there is water on the other side of the ball valve which is very near where the other fitting is that would have to be unsoldered. The water is just acting like a heat sync so i won't be able to get the pipe hot enough to pull that fitting I don't think. It seems some new ones actually use braided line so you don't have to rigidly mount them in there. Not sure i want to do that but it makes R&R much easier in the future.
I doubt it. It is typical to just hang the pump off the water lines. In this case it is a tiny pump, maybe 1/12th HP.
And that didn't end well for you, did it Dave?
Just because it mostly is satisfactory, Dave's basement still was flooded and once is too many. I wouldn't be doing a straight R&R. One definition of insanity is continuing to do the same thing and expecting a different result.
You are speculating on the reason of failure. Given the location of point of failure I'd argue that stress from weight did not cause this as it's on a non load bearing vertical surface. Had the failure been at the bottom I'd be more agreeable to that theory. These are designed to be mounted this way so I am going to assume grunfos did their due R&R diligence. I also have to assume there are thousands of this pump mounted in the exact same way all over the country. Given the internet and all I'd assume i'd have heard of at least one more instance like this. With that said, if anyone has any input (aside from sharkbite) or a 1/2" copper pipe union (Those things are bucks!!) to allow me to solder the 1/2" copper into the NPT to copper fitting that i must screw into the pump itself prior to soldering (UNLESS i get unions of course)
It is not satisfactory, it is a standard method in the industry. It is extremely rare to see these small pumps mounted. We are not talking a 100 pound 1 HP pump.
Is this on exhibit in a public area?
Install it like they did originally, pre-fab a short piece of copper to the MIP adapter and the use a coupling . You can see the original coupling used in the one pic.
So remove the pump. Do you really need hot water in 2 seconds at the risk of flooding your basement?
There was no coupling. All solder in connections. I did end up going w/ a grundfos pump w/ gasketed connections. THe temp portion of this $500 pump is garbage though. One mode is supposed to retain a temp by using an internal temp sensor to turn pump on/off and it's always in standby mode.
