FREE ESTIMATES<\/p>\n
Jacksonville\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Duval County\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 904-346-1266
\nSt Augustine\u00a0\u00a0\u00a0\u00a0\u00a0 St Johns County\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 904-824-7144
\nOrange Park\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Clay County\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 904-264-6444
\nJacksonville Beaches\u00a0\u00a0\u00a0 Duval County\u00a0 \u00a0\u00a0\u00a0\u00a0904-246-3969
\nFernandina\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Nassau County\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 904-277-3040
\nMacclenny\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Baker County\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 904-259-5091
\nPalm Coast\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Flagler County\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 386-439-5290
\nDaytona\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Volusia County\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 386-253-4911
\nServing all of Florida \u00a0and Georgia\u00a0\u00a0\u00a0 at \u00a0\u00a0\u00a0\u00a0904-346-1266<\/p>\n
EMAIL <\/strong>LARRY@1STPROP.COM<\/a> (feel free to email your bidding packages here)<\/p>\n We are a licensed backflow testing, installer, and certified.\u00a0 We can desgn solutions for HIGH HEALTH HAZARDS.\u00a0 We can install dual backflows for hospitals.\u00a0 We can install and test for residential applications, commercial applications and irrigation applications.<\/p>\n reduced pressure backflow preventor assembly<\/p>\n double check backflow preventor assembly<\/p>\n pressure vacume breaker<\/p>\n atmospheric vacume breaker<\/p>\n rp<\/p>\n rpbfpa<\/p>\n dc<\/p>\n dcbfpa<\/p>\n pvb<\/p>\n avb<\/p>\n midwest 830<\/p>\n backflow test device<\/p>\n manometer test<\/p>\n direct flow<\/p>\n backpressure<\/p>\n dump<\/p>\n spit<\/p>\n test passed<\/p>\n test failed<\/p>\n calibration of backflow device<\/p>\n test tree<\/p>\n treoo<\/p>\n treeo<\/p>\n florida<\/p>\n uf<\/p>\n university<\/p>\n A backflow prevention device<\/strong> is used to protect water<\/a> supplies from contamination or pollution.<\/p>\n In water supply<\/a> systems, water is normally maintained at a significant pressure to enable water to flow from the tap, shower etc. When pressure fails or is reduced as may happen if a water main bursts, pipes freeze or there is unexpectedly high demand on the water system, the pressure in the pipe may be reduced and may allow contaminated water from the ground, from storage of from other sources to be drawn into the system. To prevent such an occurrence, many regulatory regimes require there to be an air gap between the delivery point of mains water and local storage or use\u00a0 Where submerged mains inflow is permitted a backflow prevention device is required. In this way backflow prevention device protects the potable water system from contamination hazards which can be severe. There are over 10,000 reported cases of backflow contamination each year. Some cases can be fatal.<\/p>\n In many countries where regulations allow for the possibility of backflow , backflow prevention devices are required by law and must be installed in accordance with plumbing<\/a> or building codes<\/a>.<\/p>\n A typical backflow assembly has test cocks and shut-off valves and must be tested each year, if relocated or repaired, and when installed.<\/p>\n In the United States<\/a>, the Environmental Protection Agency<\/a> (EPA) holds local water suppliers responsible for maintaining a certain amount of purity in potable water systems. Many states and\/or local municipalities require annual testing of backflow prevention assemblies. A check valve<\/a> is a common form of backflow prevention.<\/p>\n The simplest, and most effective way to provide backflow prevention is to provide an air gap<\/a>. An air gap is simply a space between any device that opens to a plumbing system (like a valve or faucet) and any place where water can collect or pool.<\/p>\n \u00a0<\/p>\n An Atmospheric Vacuum Breaker<\/strong> (AVB<\/strong>) is a backflow prevention device<\/a> used in plumbing<\/a> to prevent backflow of non-potable liquids<\/a> into the drinking water<\/a> system. It is usually constructed of brass<\/a> and resembles a 90-degree elbow with a hood on its top to allow air to enter the water system if a siphon<\/a> attempts to form. Inside this elbow is a poppet valve<\/a> that is held “up” by the water pressure found in the system, closing the air entrance to the device. If the pressure in the “upstream side” is reduced to atmospheric pressure or below, the poppet valve drops and allows air to enter the system, breaking the siphon.<\/p>\n These devices, since they work on atmospheric principles, cannot be installed in an enclosure containing air contaminants<\/a>. As air is a fluid, those contaminants could be drawn into the device, thus fouling the pipes<\/a>. The AVB should be installed at least six inches above the highest use downstream.<\/p>\n The AVB may be used for high hazard applications and should not be used with continuous pressure on the device, as the poppet would likely stick and the AVB would no longer function properly. A shutoff valve should never be placed downstream of any AVB, as this would result in continuous pressure on the AVB. The AVB is not a testable device.<\/p>\n A chemigation valve<\/strong> is an apparatus designed to protect water supplies from agricultural chemicals used during chemigation, the application of chemicals such as fertilizers<\/a> and pesticides<\/a> through irrigation<\/a> water. Most chemigation valves consist of a spring-loaded check valve<\/a>, a low pressure drain, an air and vacuum relief valve, and an injection port for introducing the chemicals downstream of the check valve. Many chemigation valves also have a 4\u00a0inch inspection port so that a person can reach inside and feel if the check valve is still functional. Some governments require the use of two chemigation valves installed in series if hazardous chemicals are to be injected.<\/p>\n Texas State law Chapter 344.73 in Subchapter D – 1.(b) “An irrigation system which adds any chemical is considered to be a ‘high health hazard’. Such an irrigation system must not be connected to any potable water supply except through a reduced pressure principle backflow prevention assembly.”<\/p>\n \u00a0<\/p>\n A double check valve<\/strong> or double check assembly (DCA) is a backflow prevention device<\/a> designed to protect water supplies from contamination. It consists of two check valves<\/a> assembled in series usually with a ball valve<\/a> or gate valve<\/a> installed at each end for isolation and testing. Often, test cocks (very small ball valves) are in place to attach test equipment for evaluating whether the double check assembly is still functional.<\/p>\n The double check valve assembly is suitable for prevention of back pressure and back siphonage, but is not suitable for high hazard applications. It is commonly used on lawn irrigation<\/a>, fire sprinkler<\/a> and combi-boiler systems.<\/p>\n An air gap<\/strong>, as it relates to the plumbing<\/a> trade, is the unobstructed vertical<\/a> space between the water outlet<\/a> and the flood level<\/a> of a fixture<\/a>.<\/p>\n A simple example is the space between a wall mounted faucet and the sink<\/a> rim (this space is the air gap). Water can easily flow from the faucet into the sink, but there is no way that water can flow from the sink into the faucet without modifying the system. This arrangement will prevent any contaminants in the sink from flowing into the potable water system by siphonage<\/a> and is the least expensive form of backflow prevention<\/a>.<\/p>\n To further illustrate the air gap, consider what could happen if the air gap were eliminated by attaching a hose<\/a> to the faucet and lowering the hose into a sink full of contaminated water. Under the right conditions (if the water supply loses pressure and the sink is higher than the point at which the water supply enters the house, for instance), the dirty water in the sink will be siphoned into the water pipes through the hose and faucet. The dirty water then will be dispersed throughout the drinking water<\/a> system.<\/p>\n All plumbing codes require backflow prevention in several ways. The plumbing fixture manufacturers build the fixtures to meet these codes. A plumber<\/a> must not build cross-connections in his daily work practices, and Plumbing Inspectors look for improper designs or connections of piping and plumbing fixtures. A common misconception is that a “high loop” (routing a drain line above a sink’s flood level, for instance) will provide the same function as an air gap; this is not true, because the continuous connection in such a case still will allow backflow through siphoning.<\/p>\n An air gap must meet the requirements of being two times the inner diameter of the pipe (2*D) in order to be sufficient<\/p>\n A Reduced Pressure Zone Device<\/strong> (RPZD, RPZ or RPZ valve) is a type of backflow prevention device<\/a> used to protect water<\/a> supplies from contamination. RPZD may also be known as reduced pressure principle backflow prevention devices, reduced pressure zone assemblies<\/p>\n An RPZD is considered suitable for high hazard applications, that is, where the consequence of backflow into the water supply<\/a> would cause significant harm. They are considered suitable because they prevent both backflow and backsiphonage, because of a redundant design (even with two check valves broken the device still provides protection), and because they are testable to verify correct operation.<\/p>\n RPZD are often chosen instead of an air gap<\/a> since the head loss across the RPZ is much smaller.<\/p>\n The device consists of two independent check valves<\/a>, plumbed in series, with a pressure monitored chamber between. The chamber is maintained at a pressure that is lower than the water supply pressure, but high enough to be useful downstream. The reduced pressure is guaranteed by a differential pressure relief valve, which automatically relieves excess pressure in the chamber by discharging to a drain. Four test cocks are installed to allow an inspector to verify proper operation of the valve with a differential pressure meter. Two gate valves (one before and one after the RPZ) are provided to allow for testing and repair.<\/p>\n Facilities which require constant water pressure must install two RPZs in parallel so that one device will be available to supply the facility while the other is tested or repaired.<\/p>\n Discharge from the relief device is an indication that either of the two check valves is ‘passing’ (leaking past their shutoff seats) or the relief valve itself is faulty. Some normal water use conditions may cause short episodes of discharge.<\/p>\n In the case of the upstream check valve passing, the differential pressure (higher supply pressure compared with the lower chamber pressure) causes any flow to occur only in one direction. A buildup of pressure in the chamber in such a case would be relieved to the drain.<\/p>\n In the case of the downstream check valve passing, the differential pressure relief valve<\/a> prevents the possibility of the chamber pressure from exceeding the supply pressure.<\/p>\n It is theoretically possible that, when both valves are faulty, backflow could occur, should the reverse flow rate exceed the capacity of the relief valve.<\/p>\n Because certain combinations of check valve failure and\/or system backpressure cause the relief valve to discharge, the device must be mounted in a location where the drain will not become flooded.<\/p>\n An example of where backflow would harm the water supply is the use of well washing devices inside underground sewerage pumping stations. At times untreated sewerage may contain a variety of harmful gases that will effectively break down and deteriorate concrete wells, hence well washers are utilised to spray water and wash down contaminated concrete walls of a well. All well washers are installed with RPZ Devices in case a pumping station breaks down, and the sewerage level rises above the well washer causing backflow down the water supply line.<\/p>\n A reduced pressure zone device is tested with a device called a differential gauge. This gauge uses hoses attached to the various test cocks of the RPZ and checks to be certain that the check valve springs as well as the relief valve spring are not fouled and are working properly. There are a variety of manufacturers of these gauges, but most utilize either a three valve or a five valve design to test the RPZ in different ways.<\/p>\n In the UK, New York<\/a>[<\/span>1]<\/span><\/a><\/sup>, Texas<\/a>[<\/span>2]<\/span><\/a><\/sup>, as well as St. Louis city and county, the RPZ valve must be tested at least every 12 months by an accredited tester.<\/p>\n A hydrostatic loop<\/strong>, though not often used in plumbing<\/a> practice, is an arrangement of pipes formed into a vertical loop to prevent backflow of water within the plumbing potable water system. Since a siphon<\/a> has a maximum height that it can work (about 33 feet), a hydrostatic loop is built higher than 33 feet. There are several ways to prevent siphonage and an undesirable backflow of the water in a plumbing system.<\/p>\n The apparent complication of marine toilet installations today can have you reexamining the merits of a cedar bucket. Here is some help. <\/span><\/p>\n Direct Discharge<\/strong> Holding Tank<\/strong> A holding tank does not require any change to the head’s inlet connection. In fact, the inlet connection is the same for all head configurations detailed here. Use heavy-duty suction hose between the inlet fitting on the head and the through-hull; this need not be sanitation hose since sewage does not pass through it. Secure both connections with dual hose clamps. <\/span><\/p>\n If possible, the inlet through-hull should be on the opposite side of the keel from the discharge. If they must be on the same side, the inlet should be forward of and as far from the discharge as practical. A head inlet should not share a through-hull with any other inlet connection, but it can be teed off a discharge line-a sink or cockpit drain, for example-provided they are forward or on the opposite side of the keel from the head discharge. <\/span><\/p>\n Coastal Use<\/strong> All three of these hoses must be sanitation hose to resist gas permeation. Using the wrong hose on the discharge side of the toilet is the primary cause of smelly head compartments. Check existing hoses by wiping them with a clean, damp rag, then sniffing the rag. If it stinks, replace the hose. <\/span><\/p>\n Offshore Use<\/strong> If you use your boat offshore, you will want the ability to pump sewage overboard rather than retaining it. This is most easily accomplished with a Y-valve in the head discharge line. Sewage can be directed into the holding tank or overboard via a through-hull fitting. Inside the three-mile limit this Y-valve must be locked in the holding-tank position or you will be subject to a substantial fine. <\/span><\/p>\n Vented Loop<\/strong> Mount the vented loop so it will remain above the waterline at all heel angles. Clean the anti-siphon valve regularly to keep it functioning. <\/span><\/p>\n A vented loop in the inlet line can interfere with the proper functioning of the head, and its omission poses less risk because of the positive-action valve on the inlet side of the head. But if you leave the loop out, you must keep the inlet valve in good working order. A screen filter to exclude grass and other debris is highly recommended. If you want a vented loop on the inlet side, install it in the hose between the pump and the bowl<\/span><\/p>\n .<\/span><\/p>\n Before or After<\/strong> Treatment System<\/strong> Drinking water<\/strong> or potable water<\/strong> is water<\/a> of sufficiently high quality that it can be consumed or used without risk of immediate or long term harm. In most developed countries<\/a>, the water supplied to households, commerce and industry is all of drinking water standard, even though only a very small proportion is actually consumed or used in food preparation.<\/p>\n Over large parts of the world, humans have inadequate access to potable water and use sources contaminated with disease vectors, pathogens<\/a> or unacceptable levels of dissolved chemicals or suspended solids. Such water is not potable and drinking or using such water in food preparation leads to widespread acute and chronic illnesses and is a major cause of death in many countries. Reduction of waterborne diseases<\/a> is a major public health<\/a> goal in developing countries.<\/p>\n Typically, water supply networks<\/a> deliver potable water, whether it is to be used for drinking, washing or landscape<\/a> irrigation<\/a>. One counterexample is urban China<\/a>, where drinking water can optionally be delivered by a separate tap.<\/p>\n Essential to the survival of all organisms, <\/sup>\u00a0water has always been an important and life-sustaining drink to humans. Excluding fat<\/a>, water composes approximately 70% of the human body<\/a> by mass. It is a crucial component of metabolic processes and serves as a solvent<\/a> for many bodily solutes.Health authorities have historically suggested at least eight glasses, eight fluid ounces each (168 ml), of water per day (64 fluid ounces, or 1.89\u00a0litres<\/a>), <\/sup>\u00a0and the British Dietetic Association<\/a> recommends 1.8 litres. <\/sup>\u00a0The United States Environmental Protection Agency<\/a> has determined that the average adult actually ingests 2.0\u00a0litres per day.<\/p>\n We service the following areas of northeast Florida:<\/strong>Jacksonville, Jacksonville Beach, Atlantic Beach, Neptune Beach, Ponte Vedra Beach, Fernandina, Amelia Island, Callahan, Yulee, Hillard, Macclenny, St George, St Marys, Kingsland, Orange Park, Middleburg, Green Cove Springs, Penny Farms, St Augustine, Hastings, Palatka, Keystone Heights, Starke, Lake City, Waldo, Baldwin, St Augustine Beach, Crescent Beach, \u00a0Palm Coast, Daytona, Holly Hill, Titusville, Daytona Shores, Ormond Beach, Bunnell, Deland, Orange City, Port Orange, Orlando, New Smyrna Beach, Sanford, Palm Valley, Fruitcove, Mandarin, Lawtey, St. Augustine Beach, Switzerland, Vilano Beach, \u00a0Marineland, Flagler Beach, Beverly Beach, Sanderson, and Glen St. Mary.<\/p>\n STATE CERTIFIED CONTRACTOR LICENSE NUMBER\u00a0 CFCO56659<\/strong><\/p>\n STATE CERTIFIED GENERAL CONTRACTOR\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 CGC1504600<\/strong><\/p>\n NOW HIRING<\/strong><\/p>\n apply for a job online at www.asapapply.com<\/a><\/strong><\/p>\n CLICK BELOW AND PLACE A WORK ORDER<\/p>\n IN OUR AUTOMATED WORK ORDER SYSTEM<\/span><\/span><\/p>\n http:\/\/www.asap-plumbing.com\/Submit_a_New_Work_Order\/submit_a_new_work_order.php<\/a><\/span><\/span><\/p>\n \u00a0<\/strong>Serving the entire Jacksonville area including the following communities:<\/p>\nPartial list of some backflow prevention devices<\/h2>\n
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\u00a0References<\/h2>\n
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\u00a0External links<\/h2>\n
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\nThe least complicated configuration has the head’s inlet connected to a 3\/4-inch through-hull and the outlet to a 1 1\/2-inch through-hull. But direct discharge of untreated sewage into the coastal and inland waters of the United States has been illegal since 1972. If your head discharge hose is connected directly and only to a through-hull fitting, you are long overdue for corrective measures. <\/span><\/p>\n
\nA holding tank is the most common means of compliance with discharge laws. A holding tank has the advantage of being the only sewage handling method universally acceptable to all governing authorities, and it adds the least complication to sewage handling. <\/span><\/p>\n
\nIf your boat never leaves inland or coastal waters, connecting the head directly to the tank is your only legal option. The tank itself will require two additional connections, one to a pump-out fitting on deck and the other to an outside vent fitting to prevent a build-up of explosive methane inside the tank.<\/span><\/p>\n
\nBeyond the three mile limit, direct discharge is legal, and unless an offshore boat is equipped with an onboard treatment system, it is also unavoidable. Happily, the oceans are more than capable of handling the excrement of blue-water sailors without ill effect. <\/span><\/p>\n
\nIf your head is mounted below the waterline, or if it moves below when the boat heels, you must have a vented loop in a discharge line that connects to a through-hull fitting. Otherwise, if the head’s internal valves are held open by debris-an inevitable occurrence-water will siphon back into the boat. Poor head installations sink boats every year. <\/span><\/p>\n
\nIt is possible to combine these last two systems into one that provides total flexibility for the varying circumstances you encounter. With a Y-valve before the tank and one after, you can direct head discharge into the holding tank or directly overboard. And you can empty the tank at a pump-out station or offshore. A simple Y-connector allows both overboard discharge hoses to share the same through-hull fitting<\/span><\/span><\/p>\n
\nA treatment system offers nearly the same plumbing simplicity as direct discharge. Connect the head’s discharge hose to the inlet side of the treatment unit, and connect the outlet side to the dicharge through-hull<\/span><\/span><\/p>\n\u00a0General<\/h2>\n