In order to facilitate the development of an updated National Standard Plumbing Code — Illustrated (NSPC), the IAPMO NSPC Committee requests proposed changes to the 2021 NSPC. All proposals are due by March 1, 2022. Proposals accepted by the technical committee will appear in the 2024 NSPC.

The NSPC uses an annual review process and publishes the complete code every three years. For a copy of the code change form with instructions or more information on the NSPC, please visit www.iapmo.org/nspc.