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How to sweat a press connection?
Hi - new here, so please be gentle...
I'm a homeowner, and I'm adding a zone to my heating system for my basement. In searching out the parts that I need, I found the right model zone valve online, and ordered it it - the photo showed a 3/4" sweat connection, but when it arrived, both the inlet and output are unions with press connections - I looked at the product description and sure enough, it says "press" - though I didn't know what that meant at the time I ordered it. Rookie mistake...
So, I got the wrong thing, and the only options I see are:
- Buy an $1,800 tool from home depot to connect two fittings
- Return the valve and scour the internet trying to find another one (and lose out on at least $30 in shipping costs)
- Buy the "Caleffi solar fitting sweat kit" (NA12259) that I think will replace the press unions, but I can't be sure because I don't know a lot about this stuff ($30 after shipping), and risk wasting my money
- Remove the rubber O-ring inside the press connection, fill the gap with solder (effectively turning it into a pre-soldered fitting) and try sweating it onto the 3/4 copper pipe.
I'm inclined to try the 4th option - has anyone ever done something like that and had success? The way I look at it, it wouldn't be any different than a pre-soldered fitting after all is said and done...
Please let me know what you think - thanks!