21 CFR § 112.133 - What requirements apply to plumbing?

---
identifier: "/us/cfr/t21/s112.133"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "21 CFR § 112.133 - What requirements apply to plumbing?"
title_number: 21
title_name: "Food and Drugs"
section_number: "112.133"
section_name: "What requirements apply to plumbing?"
chapter_name: "FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES"
subchapter_number: "B"
subchapter_name: "FOOD FOR HUMAN CONSUMPTION"
part_number: "112"
part_name: "STANDARDS FOR THE GROWING, HARVESTING, PACKING, AND HOLDING OF PRODUCE FOR HUMAN CONSUMPTION"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "21 U.S.C. 321, 331, 342, 350h, 371; 42 U.S.C. 243, 264, 271."
regulatory_source: "80 FR 74547, Nov. 27, 2015, unless otherwise noted."
cfr_part: "112"
---


# 112.133 What requirements apply to plumbing?

The plumbing must be of an adequate size and design and be adequately installed and maintained to:

(a) Distribute water under pressure as needed, in sufficient quantities, in all areas where used for covered activities, for sanitary operations, or for hand-washing and toilet facilities;

(b) Properly convey sewage and liquid disposable waste;

(c) Avoid being a source of contamination to covered produce, food contact surfaces, areas used for a covered activity, or agricultural water sources; and

(d) Not allow backflow from, or cross connection between, piping systems that discharge waste water or sewage and piping systems that carry water used for a covered activity, for sanitary operations, or for use in hand-washing facilities.