ASAP PLUMBING AND BACKFLOW TESTING
We can test your back flow and we are certified to test Nationwide
licensed thru the University of Florida
We can also repair your back flow if they fail the back flow certification test.
REDUCED PRESSURE BACKFLOW PREVENTORS RP
DOUBLE CHECK BACKFLOW PREVENTORS DC
ATMOSPHERIC BACKFLOW PREVENTORS AVB
PRESSURE VACUME BACKFLOW PREVENTORS PVB
WHAT IS BACKFLOW?
Backflow is the undesirable reversal of the flow of water or mixtures of water and other undesirable substances from any source (such as used water, industrial fluids, gasses, or any substance other than the intended potable water) into the distribution pipes of the potable water system. Backflow occurs as a result of a “cross-connection” within the water system, which exists when there is any actual or potential connection between a potable water system and any other source or system through which it is possible to introduce into the potable system any used water or other substance.
There are many instances of cross-connection hazard. To explain the risk involved, imagine that one end of a garden hose is attached to your home’s water system and the other end is placed down into a bucket of herbicide. At the same time an abrupt loss of water occurs in the main water line serving your home (such as a water main break or large volumes of water released from a fire hydrant). The pressure drop causes a reverse flow in the water line and in a system with no backflow prevention insecticide from the bucket is sucked into your home’s drinking water and potentially into the main water line serving your community. However, if the spigot your garden hose is connected to is equipped with a hose bib device, the reverse flow would cause the check in the hose bib to engage and stop the backflow at the spigot. If there is no hose bib or if it is not operating properly, the backflow prevention assembly installed between your home and the main water line would engage and prevent the herbicide from contaminating the main water line.
The need for cross-connection control exists in all types of premises, whether industrial or residential. Backflow prevention devices help protect the public safety by preventing potable water contamination in such critical areas as municipal water systems, food processing plants, medical and dental water supplies, and many industrial applications. The Safe Drinking Water Act, signed into law in 1974, placed the responsibility of local governments and water authorities for drinking water protection. For over half a century, we has been a leader in designing and manufacturing Backflow Prevention Assemblies to protect your drinking water and promote public health and safety.
Backflow Prevention Devices
There are several different types of mechanical backflow prevention device. An alterna- tive to a mechanical device,
is a physical separation, or air gap. The air gap is a physi-
cal break in the system. The different types, of mechanical device, are used in different situations (if there is backpres- sure or backsiphonage) and for different degrees of hazard.
The degree of hazard is based on the fluid (or other substance) that may backflow into the supply piping system. The fluid may be toxic or nontoxic and could create a “non-health” or “health” hazard.
A non-health (non-toxic) haz- ard cross-connection is any point on a water supply system where a polluting substance may come in contact with potable water aesthetically affecting the taste, odor or appearance of the water, but not hazardous to health.
A health hazard (toxic) cross- connection is any point on a water supply system where a contaminating substance may come in contact with potable water creating an actual health hazard, causing sickness or death.
Valve Assembly (DC)
The double check valve assembly (DC) is composed of two single, independently act- ing check valves. The unit also has two tightly closing, resilient seated, shutoff valves located at each end of the device and four test cocks for the testing of the check valves.
Reduced Pressure Principal Assembly (RP)
Commonly referred to as an RP or RPP, this device con- sists of two independently acting check valves, together with an automatically operating pressure differential relief valve located between the two check valves. The first check valve reduces the supply pressure
at a predetermined amount so that during normal flow, and
at cessation of normal flow
the pressure between the two check valves shall be lower than the supply pressure. If either check valve leaks, the relief valve will discharge to atmosphere. This will main- tain the pressure in the zone between the two check valves lower than the supply pressure. The unit also has two, resilient seated, shutoff valves (one upstream and one downstream of the checks) and properly located test cocks for field testing.
Pressure Vacuum Breaker (PVB)
The pressure vacuum breaker (PVB) is a device that contains within a single body, a single loaded check valve and a loaded air opening valve which opens to admit air whenever the pressure within the body of the device approaches atmo- spheric. The device has two tight closing, resilient seated, shut-off valves, and it is fitted with test cocks, appropriately placed, for testing the device.
Dual Check Valve (DuC)
The dual check (DuC) is a device which has two single, independent acting check valves in series. It does not have any testcocks and is gen- erally not field tested.
Dual Check with Atmospheric Port (DCAP)
This device has two indepen- dent acting check valves with a relief valve located between the checks. The device is not testable and should only be used for lower degrees
Atmospheric Vacuum Breaker (AVB)
An atmospheric vacuum break- er (AVB) is a device which has a moving element inside, which during flow prevents water from spilling from the device and during cessation of flow, drops down to provide a vent opening. This device should not remain under pressure for long durations, and it cannot have any shutoff valve down- stream of it.
An air gap is a physical separa- tion between the free flowing discharge end of a potable pipe line and an open or non- pressure receiving vessel. To have an acceptable air gap, the end of the discharge pipe has to be at least twice the diameter of the pipe above the topmost rim of the receiving vessel, but in no case can this distance be less than one inch.
This may seem to be the sim- plest, most effective and least expensive type of protection. However, the chance for future cross-connections, the cost of additional pumps to pressurize the system often makes this an expensive protection system.
Spill-Resistant Vacuum Breaker (SVB)
The valve shall consist of a one-piece modular check valve force-loaded closed and an air inlet valve forced loaded open to atmosphere, positioned downstream of the check valve, and located between two (2) tightly closing shut-off valves and two (2) test cocks.
ASAP Backflow Preventer Parts
ASAP Backflow Products is your complete source for backflow preventer repair parts, accessories and enclosures. Founded in 1989, our company is FLORIDAS leading backflow preventer specialist, trusted by thousands of CUSTOMERS, plumbing contractors, fire line contractors, irrigation contractors. Our dedication to providing the most comprehensive selection of backflow preventer repair parts is second to none and only matched by the knowledge of our highly trained staff.
We carry nearly every imaginable part for all the major brands of backflow preventers. Whether you have Ames, ARI, Conbraco Apollo, CLA-VAL, Febco, Flomatic, Hersey, Watts, Wilkins, Viking or Rain Bird equipment, we stock the repair parts you need. Our Assembly Repair Matrix makes it easy to find the correct repair parts, repair procedures or specification sheets for all current backflow prevention assemblies. Select your manufacturer and model and all the information you need to repair the assembly will be displayed.
We use fast, reliable and insured shipping couriers to get your backflow parts to you, on time – every time anywhere in the country or around the world. We guarantee same day shipping and our website even provides UPS tracking so you’ll know where your order is and when it will arrive.
A.S.A.P. BACKFLOW TESTING
5512 WILMIN WAY
JACKSONVILLE, FL 32207