The 621 has two holes at the bottom left and right 1 5/8" apart.
Thank you for your question! Unfortunately, our shower trim kits will not work on the existing valve. However, you can update the trim for your 600 series shower with the RP54870 Renovation Kit, which is available in Chrome, Stainless Steel, or Venetian Bronze. You can also purchase a shower arm, flange, and head to match.
Date published: 2015-08-12