InspectAPedia tolerates no conflicts of interest. We have no relationship with advertisers, products, or services discussed at this website.
Oil tank fill or vent piping rust & corrosion damage:
What causes serious or dangerous rust, corrosion, or exfoliating rust damage at the oil tank filler or vent piping? How serious is the risk of costly heating oil spillage or leakage from oil fill or vent piping rust? How can this damage be repaired? This article describes installation details that increase the risk of oil piping leaks and spills traced to rust and corrosion. Leaks of water into oil piping due to ground-level fill and vent piping can lead to a costly loss-of-heat failure at a building and burst or damaged oil filler or vent piping can also lead to a costly oil spill or leak.
This article series discusses the causes of leaks at oil tank fill or vent piping, what the leak and other hazards are, and what to do about oil tank piping leaks.
Oil Storage Tank Fill & Vent Pipe Leaks Due to Rust & Corrosion
Illustrated below, and also discussed at OIL FILL & VENT PIPING is a gaggle oil storage tank fill and vent pipes located at ground level on a sidewalk in Rhinebeck, New York. We photographed the oil and fill vents both in summer (below left) and again in winter (below right).
Placing the fill and vent pipes in an outdoor sidewalk well (below that grate) seemed necessary to allow the pipes to pass through the building's foundation wall and on into the basement-located oil tanks.
But locating steel oil tank fill and vent pipes where they will at times sit in a well filled with water or melting snow exposes them to a rust problem that might be accelerated by the effects of salt tossed around on this New York sidewalk during icy winter weather. Below you can see the result: a swollen, cracking, exfoliating-rust-damaged oil tank pipe that is going to leak at any moment.
If thees oil tank fill and vent pipes have not already caused a costly oil spill outside the building it's due to luck and the fact that oil tank filling does not expose the tank to extreme pressures. Also
see OIL TANK PRESSURE.
A better design would have either provided for drainage of the well through which these oil tank pipes pass or it would have sealed them entirely to protect the piping from standing water - or worse, standing salty water.
Below at left we illustrate an oil tank fill and vent pipe duet installed well above ground, above snow level, and sealed at the building wall. This is a better installation that does not risk heavy rust and splitting rust-damaged oil fill and vent pipes.
At above right is superficial, harmless or cosmetic rust on the outside of an oil tank vent pipe.
Try the search box below or CONTACT US by email if you cannot find the answer you need at InspectApedia.
(July 6, 2014) lee said:
I have a two line fuel oil furnace I can change to a single the one line is leaking is there a good product u can pump in like with a caulking gun ? I believe the leak is just below the top of the cement floor '
this question was answered when you posted it on other articles, Lee. Please post in just one place.
Ask a Question or Search InspectApedia
Use the "Click to Show or Hide FAQs" link just above to see recently-posted questions, comments, replies, try the search box just below, or if you prefer, post a question or comment in the Comments box below and we will respond promptly.
 Fuel Storage] Tank Corrosion Study, U.S. EPA report on gasoline and oil tank corrosion, James H. Pim, P.E., John M. Searing, Suffolk County DOHS, 15 Horseblock Place, Farmingville Long Island, NY 11728, November 1988, for the Office of Underground Storage Tanks, U.S. EPA. ATTN: David O'Brien. The report presents a study of 500 underground storage tanks spanning 24 February 1987 and September 1 1988 and summarizes earlier reports on this same study. Tank sizes ranged from 175 gallons to 50,000 gallons, and oil tank ages ranged from two years to 70 years old. All 500 oil storage tanks were constructed of welded steel, and 12 other tanks that were other than plain steel were also examined. Summary [with minor edits for clarity by DJF] Five hundred plain steel [underground fuel storage] tanks plus twelve corrosion protected [under ground oil] storage tanks were removed from the ground over an eighteen month period in Suffolk County, Long Island, New York. The oil tanks were examined carefully before disposal to gather statistics on the nature and extent of steel oil storage tank corrosion that had attacked them. Information was gathered on the number, type, location, and size of oil storage tank perforations [oil storage tank leak points] the general interior and exterior corrosion condition of the oil storage tank, soil, backfill, and groundwater conditions; the presence of leaked product [heating oil], and oil storage tank statistics such as tank volume, steel plate thickness, location, product [type of heating oil stored], tank age, etc. The statistics were compiled and compared, observations made, and conclusions developed. The major conclusions [were] summarized as follows:
Size is more important than age in predicting oil storage tank failures
In general, small tanks are much more likely to perforate than large tanks due to thinner walls found in smaller oil storage tanks
Compared to external corrosion, internal corrosion is insignificant [in the underground oil storage tanks examined - warning from DF: the opposite is probably the case regarding above ground storage tanks].
Fuel oil tanks are just as susceptible to leak perforation as gasoline tanks of the same size
Existing fuel storage tanks are in worse shape than is demonstrated by storage tank testing
Storage tanks to not always leak immediately on perforation
 Thanks to Arlene Puentes for for technical edits on oil tank leak advice- 12/2005. Arlene Puentes is a licensed home inspector, educator, and building failures researcher in Kingston, NY.
 "A Case Study of a Large Scale Precision [oil or fuel] Tank Testing Program", Diane H. Heck, Tetra Tech Richardson, Newark, Delaware, web search 4/27/12, original source: http://info.ngwa.org/GWOL/pdf/870143411.PDF, copy on file as /heating/OIl Tanks UST/Tank_Test_Heck_870143411.pdf Abstract:
In September 1986, a precision tank testing program was started to bring a major Maryland utility into compliance with the State of Maryland Oil Spill Control Regulations regarding underground storage tanks. This program involved the testing of over 240 tanks ranging in size from 300 gallons to 1,500 gallons located throughout the entire state of Maryland.
Analyses of the testing results revealed that 40% of the systems tested leaked. Piping leaks caused 82% of the testing failures and tank leaks caused the remaining 18%. Tank systems located in urban areas experienced a 50% testing failure rate, while tank systems located in rural areas experienced only a 25% failure rate. Leaks in tank systems in urban areas appear to be the result of structural loading and corrosion, affects [effects] absent in rural areas. The age, capacity, and usage of the tanks did not have a role in causing leaks either in the piping or the tank.
 Fuel Oil and Oil Heat Magazine, August 1985 p.18. Fuel Oil & Oil Heating Magazine, 3621 Hill Rd., Parsippany, NJ 07054, 973-331-9545
 Standards of the National Board of Fire Underwriters, as referenced by "Domestic and Commercial Oil Burners,", Charles H. Burkhardt, 1961, 3rd Ed., McGraw Hill Book Company, p. 172
 NFPA - the National Fire Protection Association can be found online at www.nfpa.org
 "The Interim Prohibition Guidance for Design and Installation of Underground Oil Storage Tanks", U.S. EPA, EPA/530-SW-85203, Office of Underground Storage Tanks, Washington D.C.
 US EPA "How do you Properly Close a UST?" is summarized at epa.gov/OUST/fsprevnt.htm These details for temporary and permanent closing of underground oil storage tanks are provided by the US EPA as well.
 "How do you choose the right tank testing method?", Cynthia Johnson, Fuel Oil & Oil Heat Magazine, November 1995
 National Association of Oil Heat Service Managers, PO Box 380, Elmwood Park, NJ 07407
 "Homeowners Guide to Fuel Storage," Agway Energy Products, Verbank, NY, November 1990
 "Causes of Underground Corrosion", Harco Corporation, Paper HC-36, Median OH
 "Toxicological profile for fuel oils", U.S. Department of Health and Human Services, Public Health Service, Agency for Toxic Substances and Disease Registry (ATSDR) Atlanta, GA 1995. - http://www.atsdr.cdc.gov/toxprofiles/tp75.html
 Public Health Statement for Fuel Oils, ATSDR, (the full document original source can be found at http://www.atsdr.cdc.gov/toxprofiles/phs75.html). An excerpt from this document is just below. ATSDR,
Division of Toxicology,
1600 Clifton Road NE, Mailstop F-32,
Atlanta, GA 30333 888-422-8737.
Carson, Dunlop & Associates Ltd., 120 Carlton Street Suite 407, Toronto ON M5A 4K2. Tel: (416) 964-9415 1-800-268-7070 Email: firstname.lastname@example.org. The firm provides professional home inspection services & home inspection education & publications. Alan Carson is a past president of ASHI, the American Society of Home Inspectors. Thanks to Alan Carson and Bob Dunlop, for permission for InspectAPedia to use text excerpts from The Home Reference Book & illustrations from The Illustrated Home. Carson Dunlop Associates' provides extensive home inspection education and report writing material.
The Illustrated Home illustrates construction details and building components, a reference for owners & inspectors. Special Offer: For a 5% discount on any number of copies of the Illustrated Home purchased as a single order Enter INSPECTAILL in the order payment page "Promo/Redemption" space.
TECHNICAL REFERENCE GUIDE to manufacturer's model and serial number information for heating and cooling equipment, useful for determining the age of heating boilers, furnaces, water heaters is provided by Carson Dunlop, Associates, Toronto - Carson Dunlop Weldon & Associates Special Offer: Carson Dunlop Associates offers InspectAPedia readers in the U.S.A. a 5% discount on any number of copies of the Technical Reference Guide purchased as a single order. Just enter INSPECTATRG in the order payment page "Promo/Redemption" space.
The Home Reference Book - the Encyclopedia of Homes, Carson Dunlop & Associates, Toronto, Ontario, 25th Ed., 2012, is a bound volume of more than 450 illustrated pages that assist home inspectors and home owners in the inspection and detection of problems on buildings. The text is intended as a reference guide to help building owners operate and maintain their home effectively. Field inspection worksheets are included at the back of the volume.
Special Offer: For a 10% discount on any number of copies of the Home Reference Book purchased as a single order. Enter INSPECTAHRB in the order payment page "Promo/Redemption" space. InspectAPedia.com editor Daniel Friedman is a contributing author.
Special Offer: Carson Dunlop Associates offers InspectAPedia readers in the U.S.A. a 5% discount on these courses: Enter INSPECTAHITP in the order payment page "Promo/Redemption" space. InspectAPedia.com editor Daniel Friedman is a contributing author.
The Horizon Software System manages business operations,scheduling, & inspection report writing using Carson Dunlop's knowledge base & color images. The Horizon system runs on always-available cloud-based software for office computers, laptops, tablets, iPad, Android, & other smartphones