Ditto, they take more room than wire nuts IMO.
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Darn. I just bought a box of the WAGO’s.
Just added 5 new sprinkler zones and was going to replace the temp wire nuts thinking they would be more waterproof. Oh well. We will see.
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That’s just my opinion, don’t take my word for it 
They might work for you, you never know till you try.
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Those are low voltage right?
As long as space isn’t an issue and it isn’t high voltage/current, doubt you’ll have any issues. Heck they are in use by tons of people in high voltage/current applications who don’t have issues (but they’re still relatively new in the grand scheme of things). I mean the “back stabs” on outlets were considered perfectly fine for a long time, until things started melting and burning.
Personally, the contact surface is not big enough and I don’t feel it makes a strong enough connection. And as @habib said they take up a lot of space when working in a smaller box, and not as easy to shove in a corner or move out of the way.
Sprinkler valves are typically 24VAC.
Yeah and likely well under an amp. Doubt you’ll have any issues in that scenario, assuming space isn’t an issue. You can even fill the wagos with dielectric grease to seal the connections (I often do this with wire nuts, but they also sell ones with the grease already in them).
My box has multiple sizes. The smallest one is for 18 gauge, of which I am using.
I’m an old solder guy. This has to last 20+ years. I have nothing against wire nuts. I have done the twist hundreds of times.
Oh well. This is on my to do list hopefully in the next month or so.
Always the option of crimping (in critical or moisture prone situations I’ll fill the crimp with solder too).
I like the crimp splices that are similar to a wire nut, twist them all together, dip them in flux (if soldering), toss one on, crimp it down. Fill with solder or some dielectric grease. Of course the downside is if you do need to take it apart, you gotta cut it and start over.
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Thank you for not calling it a hot water heater,
On the subject of electronics repair, I know I could buy a digital multimeter. However, I am not giving up my Simpson 260 ANALOG multimeter. I’ve had it for over 50 years and it still works great.
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Still have a few varieties of simpsons in the basement (a couple quite large ones), but most of what I do needs a bit more accuracy.
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Fond memories. I do still have my Fluke from the early 90s.
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