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PLUMBING SYSTEM INSPECT DIAGNOSE REPAIR
BACKDRAFTING HEATING EQUIPMENT
DRAIN & SEWER PIPING
FLOODED HEATING EQUIPMENT REPAIR
FLOODED WATER HEATER REPAIR
GAS DETECTION INSTRUMENTS
GAS EXPOSURE EFFECTS, TOXIC
GAS EXPOSURE LIMITS & STANDARDS
GAS FIRED WATER HEATERS
GAS LP & NATURAL GAS SAFETY HAZARDS
GAS PRESSURES LP vs NATURAL GAS
GAS PIPING, VALVES, CONTROLS
GAS BTUH, CUBIC FEET & ENERGY
GAS CONVERSION LP-NATURAL GAS
GAS FLAME & NOISE DEFECTS
GAS IGNITER DEFECTS & REPAIRS
GAS LEAK DETECTION, LP / NG
GAS LIGHTING, PIPES, FIXTURES
GAS PIPING DEFECTS
GAS REGULATORS for APPLIANCES
GAS REGULATORS for LP TANKS
GAS REGLATORS, TWO STAGE
GAS SHUTOFF VALVES
LP GAS TANKS
GAS LP & NATURAL GAS SAFETY HAZARDS
LP & Natural Gas Pressures
METHANE GAS SOURCES
Natural Gas Combustion Products
SPILL SWITCH, FLUE GAS DETECTOR
TYPES OF FUEL GAS SOURCE
MANUALS & PARTS GUIDES - HVAC
METHANE GAS SOURCES
ODORS GASES SMELLS, DIAGNOSIS & CURE
ODORS, SEPTIC or SEWER
ODORS, SULPHUR SMELL SOURCES
OIL TANK PIPING & PIPING DEFECTS
PIPING IN buildings, Clogs Leaks Types
SEWER GAS ODORS
SHUTOFF VALVE LOCATION, USE
SULPHUR & SEWER GAS SMELL SOURCES
Gas piping in buildings: 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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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 see 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.
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.
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
*** Safety: gas line loose: At
*** 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.
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
John, I'm not a corrosion expert, but I think the safest bet would be to
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
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