02-658 C.M.R. ch. 13, § 5 - Low Water Control for Boilers

Current through 2022-14, April 6, 2022

13.5.1 Low Water Control Required

All gas-fired boilers must be provided with a properly installed and operating lowwater cut-off.

13.5.2 Location

The lowwater cut-off may be installed in or attached to the boiler at the level recommended by the boiler manufacturer, but in no case shall the lowwater cut-off be installed below the crown sheet. The lowwater cut-off, when not installed directly in the boiler, may be installed either in the main supply line (vertical riser) as close to the boiler as possible or in a water column of continuous piping attached directly to the boiler.

13.5.3 Appropriate Design

The lowwater cut-off must be designed and approved for the medium used (steam or water).

13.5.4 No Obstructions

No valves or other obstructive devices shall be installed between the boiler and safety controls.

13.5.5 Acceptable Manufacturer's Alternatives

Installations meeting the criteria of Chapter 10, Section 10.3.5 of NFPA #54 (2012 edition) shall be accepted as meeting the provisions of this Section.

13.5.6 Additional Acceptable Manufacturer's Alternatives

A pressure switch installed by the manufacturer and specified by the manufacturer as low-water protection shall be accepted as meeting the criteria of Chapter 10, Section 10.3.5 of NFPA #54 (2012 edition).


02-658 C.M.R. ch. 13, § 5

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