I can do it, but it's a pain. Not nearly the pain to rebuild all that. Short version, take a saw and cut off that entire valve, except where the joint in question is, don't mess that up. Once that valve body is out of the way, take a hack saw blade and make a LONG ways cut, not all the way through the valve body, but pretty close. You will need to do this a total of two times.....meaning top and bottom or L side - R side. Once you have made those cuts, get a medium sized flat heat and GENTLY use it like a chissle to pull the two halfs' apart. You will be suprised how easy it will come apart. Once apart, get some plumbers sanding cloth (200 gritt) and sand off all the extra SOLVENT (not glue). Prime it and you're back in business.
As a professional plumber, this little tip has helped me out many times....the trick is to not score the the short nipple coming from the ELL. May I suggest you use top quality valves and parts. This sort of thing isn't something one goes cheap on....not saying YOU did (PB) but ....ya know..... Now might be time to install a tee that you can better winterize with. 1/2" thread that you can install to hook up an air compressor to blow all the water out and LEAVE OPEN when you shut it down. Good Luck.....BTW, this little tip, I wouldn't even tell the plumbers working for me about it. Tear it all out and do it over....I got bills to pay, so, your welcome!!