Apparently the P-trap that I bought, the nuts and compression fittings that came with it, and the old “waste pipe” and nut on it were all crap. When I assembled everything, there were leaks where the nuts and compression fittings held things together. We gave up and called someone who does this for a living.
The plumber cut most of the waste pipe off, and replaced everything between the bottom of the sink tailpipe and the stub of waste pipe with a new PVC P-trap, pipe, and compression fittings/nuts.
Without the “late night emergency” charge, it would have only cost us $138. Not a bad price, really – we’ll give them a call (during normal hours) next time we need something done.
If you need good 24-hour plumbing service in Houston, give 911 Plumbing a call.
At least the plumber said I did an excellent job on the sink tailpipe. 😎