Hello, Chris! Thank you for your review! We are very happy to hear you are so satisfied with your Delta Faucet BT2710-SS Foundations 2-Handle Deck-Mount Roman Tub Faucet Trim Kit Only in Stainless (Valve Not Included)! To answer your inquiry, yes, this trim kit will install onto your old valve just fine. Please contact us if further assistance is needed at this time. We greatly appreciate you taking the time to leave your feedback and your loyalty to Delta Faucet Company! Best Regards, Tim