HI Brad, Is this off/on grid? And are the two wells near each other or they just join up at the tank and float switch?
If you’ve got the power then I’d install just a standard AC centrifugal pump. Sure uses more power but lasts forever. And is maybe $500 vs $2500 And you’ve said minimal water use. since you switch back and forth you could use a DPDT relay to use the reverse logic float which the CU200 requires. > On May 27, 2024, at 12:23 PM, Bradley Bassett via RE-wrenches > <re-wrenches@lists.re-wrenches.org> wrote: > > OK, all of the fittings were just fine. After pulling the pump it was obvious > that there was a total failure of the Grundfos SQFlex 3SQF-2 pump head, both > the rotor and the check valve. Water just pours through it in reverse with no > pressure. On the last test in place it would not produce more than 75psi > running on 240VAC deadheaded. This pump is only 10 years old and only served > a two person household with minimal water use on AC power, so it did not run > anywhere near as many hours as a solar pump. 100psi head. I'd buy a different > pump if I could come up with a method of control. Float switch is 1200 ft > away (half AWG#16 and half AWG#14) and a second SQFlex pump in the other well > so I'd have to figure out how to control both pumps. I do switch from one to > the other; they do not run at the same time. Remember that these float > switches are reverse, close on high water. > > Back when I sold these, the pump head was not available separate from the > motor, anyone know if that is still true? > Anyone have a good source for these? I'll look of course, but first hand > knowledge from anyone here is good. > > I do also have a backward leaky check valve in the pump house which will be a > lot of work to replace. I have a problem with cheap unions leaking also, but > they do come in handy in cases like this. I might just cut through one of the > pipes and put in a union. Otherwise I have to disassemble a lot of plumbing. > > Living in the country... > > Thanks, > Brad Bassett > _______________________________________________ List sponsored by Redwood Alliance Pay optional member dues here: http://re-wrenches.org List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org There are two list archives for searching. When one doesn't work, try the other: https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: http://www.re-wrenches.org/etiquette.htm Check out or update participant bios: http://www.members.re-wrenches.org
