Upon arrival to the location, I met with Dennis who was waiting on my arrival. I asked if he was ready for me to shut the water off, he gave me the green light and took me to the bathroom and handed me the cartridge. Pfister had sent him a new shower cartridge as his was currently not closing all the way and dripping. Moreover, I removed the cartridge and installed new one. I adjusted the temperature to the same setting as the previous and checked for leaks by turning water back on. Hence, Dennis also observed the new cartridge holding as we watched it for a few minutes. All is operating accordingly at the moment. Tech will install customer supplied cartridge