Hello,
I posted questions about this before but I never got around to try to fix it. I have an old Delta single valve faucet in the bathtub. Lately the hot water pressure has been awful. I tried taking things apart to see what I was dealing with. I don't really see anything that could be clogged. The pipes are copper up from the basement but galvanized across to the bath tub. Pressure is good to the sink.
Here is a link to a picture of the valve.
Thanks so much for any thoughts.