Delta RP46074 is the model number for the proper shower cartridge that replaces that of the 13/14 or R10000 or Multichoice Universal series of valve housings. These series names don't actually mean anything. They are 100% arbitrary and are synonymous. They are just made up to sound fancy and confuse the consumer into buying shit they don't need because there is pretty much one Delta valve housing that everyone uses for single handle style shower valves and the only valve cartridge that will work is the OEM/Factory one. Do NOT fuck around with Danco or Mahua brands. They look identical to OEM model but usually don't work....They MIGHT work....but myself and so many other people have reported the same problems with them; that they either leak or only allow for lukewarm water temps.

BUY THIS ONE: https://www.amazon.com/dp/B001DU57R2?...

DO NOT buy this one: https://www.amazon.com/dp/B097QV674S?...