46 CFR § 95.16-25 - Manifold and cylinder arrangements.

---
identifier: "/us/cfr/t46/s95.16-25"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "46 CFR § 95.16-25 - Manifold and cylinder arrangements."
title_number: 46
title_name: "Shipping"
section_number: "95.16-25"
section_name: "Manifold and cylinder arrangements."
chapter_name: "COAST GUARD, DEPARTMENT OF HOMELAND SECURITY"
subchapter_number: "I"
subchapter_name: "CARGO AND MISCELLANEOUS VESSELS"
part_number: "95"
part_name: "FIRE PROTECTION EQUIPMENT"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "46 U.S.C. 3306; E.O. 12234, 45 FR 58801, 3 CFR, 1980 Comp., p. 277; DHS Delegation No. 00170.1, Revision No. 01.4."
regulatory_source: "CGFR 65-50, 30 FR 17001, Dec. 30, 1965, unless otherwise noted."
cfr_part: "95"
---


# 95.16-25 Manifold and cylinder arrangements.

(a) A check valve must be provided between each cylinder and manifold or distribution piping. The valve must be permanently marked to indicate the direction of flow.

(b) If the same cylinder is used to protect more than one space, normally, closed stop valves must be provided to direct the agent into each protected space.

(c) Each cylinder must be fabricated, tested, and marked in accordance with 46 CFR 147.60(b) and 49 CFR part 180.

(d) The cylinders in a common manifold must be:

(1) Of the same size;

(2) Filled with the same amount of agent; and

(3) Pressurized to the same working pressure.