Hi Margaret,
Thank you for your question! This trim will work on current R10000 rough-in valves or existing 1700 series valves. If you have an older 1700 series unit, you will need to use the original cartridge (or an RP32104) rather than the cartridge that comes with the trim kit.
Thanks,
Jon
Answered by: DeltaFaucet3
Date published: 2015-09-03