My handle fits the stem that is not diamond shaped but more square. If this is not that part/model what is it. Also can the handle be replaced with a more single lever type maybe a H79?
Thank you for your question. Delta Faucet model # RP2391 is for our 600 series faucets. If you turn on your faucet by pushing up and then turning to the right or left, you have a 600 series faucet. If you turn on your faucet by just turning right or left, then you have a1300/1400 series. If you have the 1300/1400 series, the H79 can be used as a replacement.
If you have the 600 series, you will need to replace a couple of things to switch to a lever handle. You will need an RP70, RP50, RP61 and RP17443.
Date published: 2016-01-24