Thank you for your question, Leia! The R3500-WL rough-in valve that uses the RP100454 spout has 1/2" NPT (National Pipe Tapered thread). Please feel free to call, email, or message us on social if there is anything else you need.
Phone: 1-800-345-3358 | Email: email@example.com | Facebook/Twitter: @deltafaucet
Date published: 2019-10-29