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Direct Burial of CSST


Neal Lewis
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SECTION 4.9 — UNDERGROUND

INSTALLATIONS

1. CODE REQUIREMENTS

When gas piping runs are located below

grade in contact with earth or other material

that could corrode the piping, codes

require that the gas piping shall be protected

against corrosion.

When piping is installed underground

beneath buildings, codes require that the

piping shall be encased in a conduit

sealed inside of the building and vented

above grade to the outside. The conduit

shall be designed to withstand the superimposed

loads. NO FITTINGS OR COUPLINGS

ARE PERMITTED BENEATH

BUILDINGS.

2. REGIONAL/MODEL CODES

TracPipe PS (patented) and PS-II

(patent-pending) installations conform to

the underground fuel gas installation

requirements of:

The National Fuel Gas Code NFPA 54

The International Fuel Gas Code

The Uniform Plumbing Code 2003 UPC®

Trac pipe lists a specific type for underground use, but some specific requirements.

http://www.omegaflex.com/trac/litlibrary/D&I_Guide.pdf

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  • 2 years later...

Neal;

You're going to have to see if your piping is rated for underground use.

However, NJ code states 'Underground piping systems shall be a minimum depth of 12 inches below grade except as provided for in section 2415.9.1

Which states...Individual lines to outside lights, grills or other appliances shall be installed a minimum of 8 inches below grade. provided that such installation is approved and installed in locations not susceptible to physical damage.

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