Upon arrival and approval, we began the previously discussed work of installing a new shower cartridge in order to eliminate the cross connection. The manufacturer misidentified the cartridge and we purchased the wrong cartridge. We were not able to replace the cartridge. I had called the manufacturer and they did not answer and put me on a callback list. While I was waiting on the callback, I went ahead and emailed them the picture 30 minutes later they called me and wanted me re-email the picture to them. This is when they miss identify the cartridge and we ordered the wrong cartridge. This separate email that I sent was responded to a day or two after ordering the incorrect cartridge. The email had a link to the correct cartridge. We are sending the correct cartridge information to the customer as well as the manufacturers phone number so they can call and order this cartridge. This is the most cost-effective way for them to obtain the cartridge. The shower with the failed shower