Went to Hillcrest (white, not yellow store) to look for a replacement tub cartridge and pressure balancing unit. However, given the age and brand, replacement parts were non-existent. I had to replace the valve body, which meant replacing the entire tub faucet unit. The plumber came as scheduled and was friendly. Took him over 3hrs to do the job and was not overly organized or prepared as he did not have with him simple parts and could not find tools for the job. Worse part was when work was done, there was no thorough checks and the soldering job was poor as the valve leaked when the water was turned on. The area of the gyp-rock wall of the cut-out behind the valve was a mess, which took me hours to wet clean (all walls, ceilings, floors, etc.) You would figure that when using a reciprocating saw, that a HEPA dust shroud be attached to reduce the dust. He did come back to re-solder, but something so basic, how does a professional plumber mess this up? In hindsight, the job was rather easy and I would have tackled the job myself if I had the parts and time.