I'm trying to replace a corroded grease trap under my sink with a very similar model. The existing grease trap has a threaded connection on each end. My problem is that my 2" copper drain pipes are attached to the grease trap with copper male threaded adapters, and thus it is not possible to simply unscrew the drain lines from the existing grease trap and then screw them into the new one, which was what I originally expected. See pictures of my situation below: Left side of grease trap: Right side of grease trap: I have a few questions for the forum: 1) Can I simply cut the copper pipe about 1" from each threaded connection, then unscrew each adapter end (plus 1" of copper drain pipe) from each side of the old grease trap, and then screw the threaded adapters (plus 1" of copper drain pipe) to the new grease trap, and then connect the new grease trap/male threaded adapters plus 1" copper pipe ends assembly to the existing copper drain pipe with 2" flexible couplings? Do you see any major issues/drawbacks to this method? I proposed this method because I expect it might be a challenge to remove/separate 2" copper drain lines, and I'm not sure how to go about removing the threaded male adapters to unscrew them from the existing grease trap. I would also prefer the ease of maintenance/future replacement of having flexible couplings that can be removed with a screwdriver. 2) If you recommend an alternative method to the one I proposed above, please share details of how I should go about removing the existing grease trap (heat male threaded adapters and then use wrench to unscrew? Tricks to getting these off? How long will I have to heat? Should I use Mapp gas? Any tips are appreciated. I've done one or two very small plumbing jobs with 1/2" and 3/4" copper, so this is the largest pipe I've ever worked on, and the first time i've ever potentially had to desolder existing pipe. Thank you very much for your help!

Hi, My single handle kitchen faucet keeps coming loose. I tighten the set screw repeatedly and within a week the handle is loose. I even ordered a new handle and it is loose within two days!!! Any idea what I need to check and tighten? Thanks