Backflow prevention certification workshop information and materials

The information enclosed in this booklet consists of memos, policy statements and other pertinent information to guide you in the establishment of a backflow prevention program.

A Miocene mud volcano and its plumbing system: A chaotic complex revisited (Monferrato, NW Italy)

Chaotic deposits are frequently reported in the geological literature and are commonly interpreted as olistostromes or tectonic melanges. A chaotic complex in the Cenozoic succession of Monferrato (NW Italy) consists of interbedded mud breccia and burrowed silty clays that are pierced by sheared mud breccias and embed carbonate-cemented blocks. These may be represented by microcrystalline limestones or strongly cemented matrix-supported breccias locally containing remains of chemosymbiotic organisms (lucinid bivalves). Moreover, cylindrical concretions, up to 15 cm in diameter and 1 m long, occur in the chaotic complex and crosscut bedding planes at high angles. The cement of all these lithified portions is mainly dolomite characterized by low delta(13)C values (from -10.3 to -23parts per thousand PDB) and delta(18)O values up to + 7parts per thousand PDB. The delta(13)C values testify to precipitation of carbonates induced by microbial oxidation of methane, whereas the markedly positive delta(18)C signature, ubiquitous in the cylindrical concretions, is the evidence for the presence and destabilization of gas hydrates. The studied section provides a well-exposed example of the geological record of the birth, life, and death of a mud volcano. Unsheared, soft mud breccias represent mud flows along the flanks of the volcano, whereas sheared mud breccias are the result of the injection of unconsolidated overpressured fine-grained sediments, both taking place during ``eruptive'' phases. They were followed by more quiet stages of hemipelagic sedimentation, burrowing, and CH4 seeping. The cylindrical concretions represent the first described ancient example of the chimneys observed in present-day mud-volcano settings. They are the remnants of a cold-seep plumbing network that crosscut the mud volcano edifice. The chimneys were the pathway for the expulsion toward the sea floor of gas- and sediment-charged fluids likely originated from destabilization of methane gas hydrates. The association of mud breccias and methane-derived carbonates may not be due to mass gravity flows but can be primary and, therefore, is a diagnostic criterion for recognizing chaotic deposits due to mud volcano activity in the geological record.

Receipt from Burrow, Chatfield and Co. for plumbing

Receipt from Burrow, Chatfield and Co. for plumbing, Oct. 23, 1876.

Plumbing Department

Students in the Plumbing Department at the New York Trade School are shown working on bathroom equipment in a plumbing classroom. Black and white photograph with some damage to the edges.

Classroom in the Plumbing Department

An empty classroom in the Plumbing Department at the New York Trade School is pictured. The two platforms contain models of framing for a house including pipes on which students may practice working. Black and white photograph.

Plumbing Students at Work on a Sink

Students in the Plumbing Department at the New York Trade School work on a sink in a mock bathroom. Black and white photograph.

Plumbing Students at Work

Two students are depicted working on a mock bathroom in the Plumbing Department at the New York Trade School. Black and white photograph.

Signature, positive Hopf plumbing and the Coxeter transformation

By a theorem of A'Campo, the eigenvalues of certain Coxeter transformations are positive real or lie on the unit circle. By optimally bounding the signature of tree-like positive Hopf plumbings from below by the genus, we prove that at least two thirds of them lie on the unit circle. In contrast, we show that for divide links, the signature cannot be linearly bounded from below by the genus.

The Great Financial Plumbing: From Northern Rock to Banking Union. CEPS Paperback, 19 October 2015

The financial and economic crises have led to an enormous plumbing exercise, involving a fundamental re-design of the global and European regulatory and supervisory system. This book systematically assesses the big items on the G-20 and EU agendas and the effectiveness with which they have been implemented in the EU. Its publication coincides with the demand by European Commissioner Jonathan Hill, in the context of the Capital Markets Union, for a 'comprehensive review' of the impact and coherence of EU legislation in the area of financial services. Karel Lannoo argues in the book that much has been done by European policy-makers to make the financial system safer and to prevent banking crises of the magnitude that erupted in 2008 and 2011, but that the new framework puts an enormous burden on banks and supervisors to implement and enforce it correctly. With the huge amount of secondary or 'level-2' legislation in place, this process has spiralled out of control, and as member states always find new ways of ‘gold-plating’ EU rules, the EU always finds further reasons to achieve a 'single rulebook'. This process has to be brought to a halt, and mutual recognition, a basic single-market principle, reinforced. The new framework also brings huge advantages, which should offer benefits to all parties. Banking Union is a huge step forward, which introduces 'one-stop shopping' for banks in the eurozone, another basic single market principle, and a true single supervisor. The clarity of the new resolution framework should, if correctly applied, trigger early intervention and bring an end to forbearance, thereby enforcing market discipline in the banking sector. It should also avoid reliance on taxpayers' money to bail-out banks in trouble, which totalled 14% of EU GDP during the crisis.

Planning water supply : cost-rate differentials and plumbing permits /

Mode of access: Internet.

Plumbing.

"With changes 1 and 2."

Investigation of standards, performance characteristics, and evaluation criteria for thermoplastic piping in residential plumbing systems /

"Sponsored by Office of Policy Development and Research, Department of Housing and Urban Development."

Standard practical plumbing; an exhaustive treatise on all branches of plumbing construction, including drainage and venting, ventilation, hot and cold water supply and circulation; showing the latest and best plumbing practice, special attention being given to the skilled work of the plumber, and to the theory underlying plumbing devices and operations,

Mode of access: Internet.

National apprenticeship standards for plumbing and steamfitting-pipefitting /

Mode of access: Internet.

The Metal worker : a weekly journal of the stove, roofing, cornice, tin, plumbing and heating trades.

Description based on: volume 39, no. 1 (Jan. 7, 1893); title from caption.