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Photograph of abandoned gas piping Gas Piping Defects
Identify & Report LP Gas or Natural Gas Fuel Piping Problems, Clogs, Damage

  • GAS PIPING DEFECTS - CONTENTS: How to Identify & Report LP Gas or Natural Gas Fuel Piping Defects. LP Gas Regulator Installation Requirements. LP Gas Regulator Inspection Procedure.LP Gas Piping Defect List & sample home inspection report language. Natural gas piping defects, leaks, leak detection, troubleshooting & reporting. How to inspect, report, & correct abandoned gas equipment and old gas lighting piping & fixtures. Gas Piping Maintenance Tips for LP gas (bottled gas or propane gas) & for piped-in natural gas. Home inspection report language examples for gas piping defects and safety hazards
  • POST a QUESTION or READ FAQs about gas piping in buildings: defects, inspection, trougleshooting, leaks, repairs
  • REFERENCES
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Gas piping in buildings for natural gas, LP gas, or propane distribution:

Defects, inspection, trougleshooting, leaks, repairs: in this article series on gas piping we provide descriptions and photographs of unsafe gas piping, indications of unsafe or improperly operating gas appliances, gas meters, and other gas installation defects are provided.

This article series on gas piping, lighting, fixtures, and related topics provides free sample draft home inspection report language for reporting defects in oil and gas piping at residential properties.



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How to Identify & Report LP Gas or Natural Gas Fuel Piping Defects

Leaky LP gas valve (C) Daniel Friedman Safety Warnings for Gas Leaks

Immediate LP or natural gas safety hazards: if there is evidence of an LP or natural gas leak at a building, gas odors, for example, you should:

Heating equipment which the inspector (or building occupant or manager) judges to be an immediate life safety hazard should be shut down and appropriate emergency services called.
See GAS LEAK DETECTION, LP / NG for leak detection procedures and alternatives.

General safety warning: improper installation and even improper inspection and testing methods involving natural or "LP" gas can involve dangerous conditions and risk fire or explosion. If you smell gas you should leave the building immediately and should do so without doing anything that could create a spark such as operating a light switch or telephone. From a safe location, call your gas company's emergency line and/or your fire department. The text provided here is a working draft and may be incomplete or inaccurate.

Contact us to suggest text changes and additions and, if you wish, to receive online listing and credit for that contribution. Also s
ee How to Report Defects in Oil Piping.

NOTICE: while example report language is provided here, reproduction of this or any of our web pages or their contents at other websites or in printed documents for sale is prohibited.

LP Gas Regulator Installation Requirements

LP Gas Regulator Inspection Procedure

The LP Gas regulator(s) should be inspected each time that the building receives an LP gas delivery.

LP Gas Piping Defect List & sample home inspection report language

Safety warnings about gas piping: Check condition of flexible gas line connections: Caution: home inspectors and other private building inspectors do not pull out appliances to look at gas line connections, but you should do so, or have your service technician do so, in order to check condition of flexible connections for leaks and assuring that a shutoff valve is installed. Watch for leaks in those flex-connector lines between gas line and the appliance as they are thin wall and often corrode and leak. Gas leaks are dangerous.

Safety warning. Flexible soft copper piping defect example: if flexible soft copper tubing has been used to supply municipal (natural) gas to a electric clothes dryer, hot water heater, or heating system, this is not a recommended installation and it may be prohibited by local codes - "black iron" steel piping is required in many jurisdictions.

Safety warning: Flexible ridged thin wall copper tubing defects: if flexible "corrugated" or flexible thin-wall copper tubing been used to supply gas to a hot water heater, or heating system, this is not a recommended installation and it may be prohibited by local codes.

Technical Violation: Flexible copper LP gas line may not be routed through walls or similar locations where it may be damaged or punctured. For these sections of routing threaded iron pipe is required. This is an usually inexpensive item to correct. You can discuss this point further with your gas supplier and your plumber.

All gas or oil piping must comply with local codes and ordinances or with the national fuel gas codes. Copper and brass tubing (except tin lined copper) shall not be used if the gas contains more than an average of .3 grains of hydrogen sulfide per 100 standard cubic feet of gas.

Photograph of gas lighting in a pre-1900 home"Abandoned" live gas piping: Watch out: don't assume that all "old or antique gas pipes" in a building have been actually disconneted from the gas supply.

We have found "live" gas supplied in fireplaces in older homes where a gas log or heater had previously been installed and "live gas" supplied at antique gas lighting fixtures that occupants thought had been disconnected. An example of a surprising "live" gas light is shown in our home inspection photo (left) from a New York home constructed in the 1920's. See GAS LIGHTING, PIPES, FIXTURES

*** Safety: gas line loose: At [record location of observed piping defect] you will need to provide better for the gas piping. Loose piping risks dangerous gas leaks. Even if you did not observe/smell a leak at this location when we inspected. This item should be handled as soon as possible.

*** Safety: We recommend that unused gas equipment be removed and that you have the unused section of gas line properly sealed by a qualified plumber or by your gas supplier. Leaky old appliances or gas lines are dangerous.

Gas Piping Maintenance Tips

MAINTENANCE TIP: Openings where the gas supply pipe enters the building should be caulked to reduce possible water or insect/rodent pest entry.

Safety Recommendation: the gas supply line at
... is not installed according to the manufacturer's recommendations. Proper iron pipe plumbing with sediment trap, also called a "drip leg" (typically at least 3" long off of a "tee" at same height as the gas control) should be installed. This is an inexpensive plumbing correction and it should corrected soon to avoid moisture damage to the gas controls. (Note that depending on the quality of the gas being delivered in some municipalities, the installation of a drip leg or dirt leg may not be required by local officials.

*** Safety: gas line loose: At
...
better support is needed for the gas piping. Loose piping risks dangerous gas leaks.
... We did not observe/smell a leak at this location when we inspected. This item should be handled as soon as possible.

*** Safety:We recommend that unused gas equipment be removed and that you have the unused section of gas line properly sealed by a qualified plumber or by your gas supplier. Leaky old appliances or gas lines are dangerous.

Clogged Gas Pipe Diagnosis & Repair

This topic has moved to a separate page at GAS PIPING CLOG REPAIR

Methods for Protecting Steel Gas Piping from Corrosion

Reader Question: 8/8/14 John said:

I have a gas pipe running across the concrete floor of the garage that has gone rusty where the concrete has broken up (small area approx 6"). British Gas have inspected the pipe & told me there is no leak & I could cover it with concrete. My question is could I use PVA & Mortar mix or would this combination react with the rusty pipe?

This question and reply were originally posted in the FAQs at CAST IRON DRAIN PIPING

Reply:

John, I'm not a corrosion expert, but I think the safest bet would be to

1. gently clean off surface rust from the gas pipe

2. spray the exposed metal surfaces with an expoxy paint

3. follow British Gas' advice permitting covering the pipe with concrete

Unprotected-steel in concrete is exposed to corrosive effects that can damage the steel or in turn the concrete.

Research Citations: corrosivity of concrete on steel pipes

These steel-in-concrete corrosivity references may be of interest. For example Biczók discusses methods for protecting steel embedded in concrete and Verbeck describes how that corrosion occurs

...


Continue reading at GAS PIPING CLOG REPAIR or select a topic from closely-related articles below, or see our complete INDEX to RELATED ARTICLES below.

Or see GAS PIPING, VALVES, CONTROLS

Or see GAS PIPING, FLEXIBLE CSST

Or see PLASTIC PIPING ABS CPVC PB PEX PVC

Or see PEX PIPING INFORMATION

Or see PLASTIC PIPE LEAK CAUSES

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GAS PIPING DEFECTS at InspectApedia.com - online encyclopedia of building & environmental inspection, testing, diagnosis, repair, & problem prevention advice.

INDEX to RELATED ARTICLES: ARTICLE INDEX to GAS APPLIANCES, PIPING, CONTROLS

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