---identifier: "/us/cfr/t33/s157.222"source: "ecfr"legal_status: "authoritative_unofficial"title: "33 CFR § 157.222 - Pump and piping arrangements."title_number: 33title_name: "Navigation and Navigable Waters"section_number: "157.222"section_name: "Pump and piping arrangements."chapter_name: "COAST GUARD, DEPARTMENT OF HOMELAND SECURITY"subchapter_number: "O"subchapter_name: "POLLUTION"part_number: "157"part_name: "RULES FOR THE PROTECTION OF THE MARINE ENVIRONMENT RELATING TO TANK VESSELS CARRYING OIL IN BULK"positive_law: falsecurrency: "2026-03-24"last_updated: "2026-03-24"format_version: "1.1.0"generator: "[email protected]"authority: "33 U.S.C. 1903; 46 U.S.C. 3703, 3703a (note); Department of Homeland Security Delegation No. 0170.1. Subparts G, H, and I are also issued under section 4115(b), Pub. L. 101-380, 104 Stat. 520; Pub. L. 104-55, 109 Stat. 546."regulatory_source: "CGD 74-32, 40 FR 48283, Oct. 14, 1975, unless otherwise noted."cfr_part: "157"---
Identifier
/us/cfr/t33/s157.222
Currency
2026-03-24
Positive Law
No
Updated
2026-03-24
Chapter
Coast Guard, Department of Homeland Security
Authority
33 U.S.C. 1903; 46 U.S.C. 3703, 3703a (note); Department of Homeland Security Delegation No. 0170.1. Subparts G, H, and I are also issued under section 4115(b), Pub. L. 101-380, 104 Stat. 520; Pub. L.... 33 U.S.C. 1903; 46 U.S.C. 3703, 3703a (note); Department of Homeland Security Delegation No. 0170.1. Subparts G, H, and I are also issued under section 4115(b), Pub. L. 101-380, 104 Stat. 520; Pub. L. 104-55, 109 Stat. 546.
# 157.222 Pump and piping arrangements.(a) Dedicated clean ballast tanks must be connected to the least practicable:(1) Number of pumps; and(2) Amount of piping.(b) Each piping system that is arranged to convey clean ballast and cargo must be designed to be flushed to the slop tank with water.(c) The piping system of each dedicated clean ballast tank must be arranged so that oily water does not enter any dedicated clean ballast tank when the piping system is flushed.(d) The piping system of each dedicated clean ballast tank must have at least two valves that isolate that tank from each cargo tank.(e) The piping system of the dedicated clean ballast tanks must have a sample point that is located in a vertical section of discharge piping.An example of a sample point is shown in 46 CFR Figure 162.050-17(e).