I have a Delta single-handle faucet. I installed a conversion kit about half a year ago to update its trim from a knob to a lever. It's been great until yesterday when my wife complained that no matter how she maneuvered the lever, only scalding hot water was coming out of the faucet.
I took the assembly apart and discovered that the post which connected to the conversion ball was loose:
I tried tightening the post by hand and even with a wrench, but it quickly came loose again once it experienced the torque of the lever.
I checked with local plumbing supply stores and they don't carry the part. I'm wondering if I can fix it temporarily (for a week, say) while we await the new part. The post is secured to the ball via a short thread. Perhaps there's a suitable thread locker for this application which can withstand the torque and water? I tried JB Weld but that failed miserably. Both the post and the ball are made of steel.