# Valve maintenance; distribution systems

- **operation:** document
- **citation:** Mich. Admin. Code R 460.20329
- **title:** Valve maintenance; distribution systems
- **source type:** regulation
- **agency:** Michigan Public Service Commission
- **status:** current
- **official:** true
- **published on:** Not available
- **effective on:** 2026-05-04
- **summary:** Rule 329. In addition to the requirements contained in 49 CFR 192.747, which is adopted by reference in R 460.20606, an operator shall partially operate a valve that may be necessary for the safe operation of a distribution system, other than plastic valves, at intervals of not more than 15 months, 
- **machine formats:** - **json:** https://regulus.evalyn.ai/document/mi-admin-code-r-460-20329.json
- **markdown:** https://regulus.evalyn.ai/document/mi-admin-code-r-460-20329.md
- **app url:** https://regulus.evalyn.ai/document/mi-admin-code-r-460-20329
- **source url:** https://ars.apps.lara.state.mi.us/AdminCode/DownloadAdminCodeFile?FileName=R%20460.20101%20to%20R%20460.20606.pdf
**body:**

Rule 329. In addition to the requirements contained in 49 CFR 192.747, which is adopted by reference in R 460.20606, an operator shall partially operate a valve that may be necessary for the safe operation of a distribution system, other than plastic valves, at intervals of not more than 15 months, but at least each calendar year.

History: 1998-2000 AACS; 2022 AACS.
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- **body characters:** 369