Code of Maine Rules › 02 - DEPARTMENT OF PROFESSIONAL AND FINANCIAL REGULATION › 658 - MAINE FUEL BOARD › Chapter 8 - INSTALLATION OF OIL BURNING EQUIPMENT › Section 658-8-8 - Oil Supply and Return Piping

Current through 2024-29, July 17, 2024
8.8.1
Continuous Supply and Return Lines Required
Wherever a copper oil supply or return line is installed
				  under cement, sub-floors, or earth surface, it must be continuous without any
				  splices from the burner to the tank.
8.8.2
Conduit Required
All copper oil supply and return lines must be encased in a
				  continuous piece of non-metallic liquid-tight conduit such as PVC, ENT, coated
				  copper tubing, or other approved material and must be secured in order to
				  prevent physical damage. The end of the conduit shall not exceed more than two
				  (2) inches from any fitting, except the connection at the fuel tank and at the
				  fuel pump located at the burner shall not exceed 6".
In order to avoid undetected oil leaks under floors, the
				  conduit must be a minimum of one pipe size larger than the oil supply and
				  return lines. The ends of the conduit must penetrate the cement or earth
				  surface a minimum of two (2) inches above grade.
An oil supply or return line that penetrates a foundation
				  wall must be sealed at the wall to prevent the entry of water, insects or
				  rodents.
8.8.3
OSV
				Valve or PRV Valve Required: Underground Tubing
Coated copper tubing must have an OSV valve or PRV valve
				  installed at the tank when used underground.
8.8.4
OSV Valve or PRV Valve Required:
				Tanks Higher Than Burner
Wherever an outlet of an oil supply tank is located more than
				  four (4) feet above the burner, an OSV valve or PRV valve is
				  required.
8.8.5
Concealment of Oil Lines
No oil supply or return line shall be concealed in a wall,
				  ceiling, or partition unless access to the oil supply or return line can be
				  made without cutting through existing walls, ceilings or partitions. This may
				  be accomplished by providing removable panels.
8.8.6
Use of Coated Copper
				Tubing
Coated copper tubing must be approved by the manufacturer for
				  the intended use.
8.8.7
Oil Filter Support
When an oil filter or other accessory equipment is connected
				  to copper piping smaller than ¾ inches and is not directly connected to
				  the oil tank or oil burner, the filter or other devices must be rigidly
				  supported by a wall- or floor-mounted bracket or other means that provides
				  sufficient support and stability for servicing this type of accessory
				  equipment.
8.8.8
Flare
				Fittings Required
All oil supply and return lines of copper tubing must be
				  connected by flare fittings only. All fittings must be accessible for service
				  or replacement. No compression fittings shall be used on a supply or return oil
				  line unless it is for the introduction of the lines at the top of the tank with
				  a single or double tap bushing.
8.8.9
Flare Frost Fittings Required
				Outside
All connections of supply or return oil lines located outside
				  must be made with flare frost fittings.
8.8.10
Disconnected Lines
No oil lines or oil devices which are disconnected from an
				  oil supply tank, burner or unit, shall be left open. Any oil line or oil device
				  which is disconnected or discontinued must be sealed or closed with a plug, cap
				  or other approved fitting.
8.8.11
Removal of Unprotected Supply
				Lines Required
Unprotected supply lines that are buried or grouted must be
				  removed from service.
8.8.12
Underground Piping: Tanks Over 660 Gallons
As set forth in the Appendix to this Chapter, if underground
				  or under-slab piping is connected to a tank of over 660 gallons capacity, or to
				  tanks with an aggregate capacity of over 1320 gallons, the installation of the
				  underground piping must be installed by a certified underground oil tank
				  installer and otherwise meet Maine Department of Environmental Protection
				  requirements.
8.8.13
Reporting of Oil Spills Required
Oil spills, regardless of the amount spilled, must be
				  reported within two (2) hours to the Maine Department of Environmental
				  Protection in accordance with the Appendix to this Chapter.