46 CFR § 181.310 - Fire main and hydrants.

---
identifier: "/us/cfr/t46/s181.310"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "46 CFR § 181.310 - Fire main and hydrants."
title_number: 46
title_name: "Shipping"
section_number: "181.310"
section_name: "Fire main and hydrants."
chapter_name: "COAST GUARD, DEPARTMENT OF HOMELAND SECURITY"
subchapter_number: "T"
subchapter_name: "SMALL PASSENGER VESSELS (UNDER 100 GROSS TONS)"
part_number: "181"
part_name: "FIRE PROTECTION EQUIPMENT"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "46 U.S.C. 2103, 3306; E.O. 12234, 45 FR 58801, 3 CFR, 1980 Comp., p. 277; DHS Delegation 00170.1, Revision No. 01.4."
regulatory_source: "CGD 85-080, 61 FR 982, Jan. 10, 1996, unless otherwise noted."
cfr_part: "181"
---


# 181.310 Fire main and hydrants.

(a) A vessel that has a power driven fire pump must have a sufficient number of fire hydrants to reach any part of the vessel using a single length of firehose.

(b) Piping, valves, and fittings in a fire main system must comply with subpart G, part 182, of this chapter.

(c) Each fire hydrant must have a valve installed to allow the firehose to be removed while the fire main is under pressure.

(d) Spanner wrenches must be provided where a 40 millimeter (1.5 inch) diameter firehose is required by § 181.320(b). Existing vessels as of July 22, 2016 have 180 days to comply with this requirement.

[CGD 85-080, 61 FR 982, Jan. 10, 1996, as amended at 62 FR 51358, Sept. 30, 1997; USCG-2012-0196, 81 FR 48299, July 22, 2016]