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Showing 1 to 12 of 12 for “"Pinhole leaks"”.
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An Assessment and Modeling of Copper Plumbing pipe Failures due to Pinhole Leaks
Pinhole leaks in copper plumbing pipes are a big concern for the homeowners. The problem is spread across the nation and remains a threat to plumbing systems of all ages. Due to the absence of a single acceptable mechanistic theory no preventive measure is available to date. Most of the present …
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Initiation, Propagation, and Mitigation of Aluminum and Chlorine Induced Pitting Corrosion
… key factors contributing to the formation of pinhole leaks in copper plumbing. These factors included high chlorine, pH levels and the presence of aluminum solids. Experiments were conducted to 1) examine the interplay between these constituents, 2) confirm that the water was aggressive enough …
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Incidence and Costs of Pinhole Leak Corrosion and Corporate Cost of Capital Borrowing
… factors influencing the occurrence and costs of pinhole leak corrosion as well as the household decisions for corrosion prevention and plumbing material selection. Three mail surveys of households were used to elicit the experiences with leaks as well as the optimal corrosion prevention and …
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A Discrete Choice Mean Variance (EV) Cost Model to Measure Impact of Household Risk from Drinking Water Pipe Corrosion
… their home plumbing systems in the event of a pinhole leak, a tiny pin-sized hole that forms in copper, drinking-water pipes. These leaks can cause substantial damage and cost homeowners thousands of dollars in repairs. Since pinhole leaks are not related to the age of pipe material, a …
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Microbial Ecology of Acanthamoeba polyphaga and Sulfate-Reducing Bacteria in Premise Plumbing
… covering pits in many homes experiencing pinhole leaks, but the mechanisms of the survival of these organisms in potable water systems are poorly understood. Nutrient studies conducted show that the absence of nitrogen in solution may encourage copper corrosion by SRB. In addition, a …
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Calcium Carbonate Formation in Water Distribution Systems and Autogenous Repair of Leaks by Inert Particle Clogging
… coatings can be beneficial and stop pipeline leaks via self-repair or clogging. Ironically, the actions we are taking to increase the lifespan of distribution systems (i.e. adding corrosion inhibitors) might have worsened leaks and pipe lifespans due to interference with self-repair. The …
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Essays on the Economics of Drinking Water Quality and Infrastructure
… for three drinking water issues: water quality, pinhole leaks in home plumbing infrastructure and aging public infrastructure. The research is based on a mail survey of consumers in Northern Virginia and the Maryland suburbs of Washington D.C. The analysis focuses on the relationship between …
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Investigation of Copper Pitting Propensity Using Bench and Field Scale Testing
… at some low level; however an outbreak of copper pinhole leaks recently occurred that is temporally correlated with high chlorine and chloramine concentrations. Experiments investigated combinations of disinfectant type (free chlorine or chloramines) and corrosion inhibitor (orthophosphate or zinc …
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Flow Induced Failures of Copper Drinking Water Tube
… loss, and, in some cases, the development of pinhole leaks. Changes in water chemistry and the existence of a pre-existing protective scale layer had nearly no mitigating effects on copper cavitation damage. An exponential relationship was found between the initial copper pipe wall thickness …
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Influences of Water Chemistry and Flow Conditions on Non-Uniform Corrosion in Copper Tube
… that further developed into fully penetrating pinhole leaks. Modifications to this base water chemistry found that dosing a chloramine disinfect (rather than free chlorine) or the addition of silica greatly reduced corrosion activity and pitting propensity on copper pipes. In another short-term …
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Two Issues in Premise Plumbing: Contamination Intrusion at Service Line and Choosing Alternative Plumbing Material
… water plumbing systems use copper pipes. Pinhole leaks in copper plumbing pipes have become a nationwide concern because these leaks cause property damage, lower property values, and result in possibility of adversely affecting homeowners' insurance coverage. In addition, resulting mold …
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Beyond Water Regulation: Contamination of Private Wells, Citizen Science, and Corrosion of Household Plumbing
… analysis of contaminants in private wells, 3) Leaks or corrosion within building plumbing, and 4) The role of citizen scientists in addressing water quality concerns. Private wells, which provide water for approximately 13% of the population (42.5 million people), are not subject to any federal …