How to sweat Oatey valve without destroying it
The faucet or valve should be in the open position before soldering/sweating.
If possible, wrap a few layers of cloth or absorbent paper around the metal between where you are soldering and the plastic components and soak this with water.
Electronic solder (60/40 or 62/38) has a lower melting point compared with plumbing solder (50/50 or 40/60) and this reduces the chance of damage from soldering heat.
The disadvantages of crab apple trees. In summer, the apples are too sour to pick and eat. In winter the birds come and leave dropping all over the place.