backflowpreventer中文

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RPZBackflowPreventer

A3: On new installations, the pressure regulator is usually located where the water line comes into the home just inside the foundation (next to main shut-off valve). On some older installations, the pressure regulator might be found on the street side of the water meter. Distribution department staff can help with determining the location of new regulators and helping to find existing regulators.

All irrigation systems new or existing should be equipped with an approved backflow prevention assembly. Only properly installed state-approved backflow prevention assemblies meet the plumbing code and provide health protection for family and neighbors.

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DCABackflowPreventer

Irrigation systems make watering lawns and gardens easier and save time BUT water that may be contaminated by weed killers and/or fertilizers can backflow into the home's drinking water. Irrigation systems not protected by approved backflow prevention assemblies could endanger the health of a household neighborhood or community. Steps can be taken to prevent this dangerous situation.

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WattsBackflowpreventer

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A8: There are two reasons: 1.) Most public water mains are supplied by pumps or pressure reducing valves. This equipment may produce temporary high pressure surges, which can be transmitted to household plumbing. A properly operating household pressure regulator will help prevent these surges from entering your plumbing. 2.) Your municipality might increase the pressure in the main line that supplies your house.

A6: This is partly a matter of owner preference. Most homeowners set their pressure at approximately 50 pounds per square inch (psi). Lower settings will help conserve water and prolong plumbing and fitting life while higher settings will have the opposite effects.

Double CheckBackflowPreventer

A1: A household water pressure regulator reduces the water pressure from the public water main to a pressure that is usable by the customer and compatible with normal household plumbing and fixtures. It also helps prevent pressure surges from entering the household plumbing from the public main. High water pressure can result in dripping faucets and water pipes, and it can damage appliances.

A2: A pressure regulator is a spring-loaded valve that regulates pressure on the downstream (house) side of the valve. Altering the degree of spring compression changes the downstream pressure.

PVBBackflowPreventer

What are the four types ofbackflow preventers

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A7: Yes. Universal plumbing code requires that pressure regulators be installed to prevent high pressure-related damage to household plumbing, fixtures and equipment.

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Types of irrigationbackflow preventers

First ensure that a proper backflow preventer is installed and maintained. A backflow preventer is a mechanism to prevent backflow which provides a physical barrier to backflow. The principal types of mechanical backflow preventer are the reduced-pressure principle assembly the pressure vacuum breaker assembly and the double check valve assembly. A secondary type of mechanical backflow preventer is the residential dual check valve.

Backflow preventers are saving lives across the United States. Sound dramatic? It's really not when you think about the potential danger of consuming water not suitable for drinking. Many states now require the installation of a backflow preventer on every sprinkler irrigation system. A properly installed backflow preventer protects a home's pure drinking water supply by stopping contaminated water from mixing with the drinking water. Understanding what backflow is how it occurs and how to stop potentially dangerous backflow situations will help to avoid problems in your clients' drinking water.

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Backflow preventers are saving lives across the United States. Sound dramatic? It's really not when you think about the potential danger of consuming water not suitable for drinking. Many states now require the installation of a backflow preventer on every sprinkler irrigation system. A properly installed backflow preventer protects a home's pure drinking water supply by stopping contaminated water from mixing with the drinking water. Understanding what backflow is how it occurs and how to stop potentially dangerous backflow situations will help to avoid problems in your clients' drinking water. What is Backflow and how does it occur?When nonpotable water or other substances flow through a cross-connection and into the piping of a public water system or consumer's potable water system it is called backflow. Backflow can be caused by a downstream pressure that is greater than the supply pressure or by negative pressure (a vacuum). Increases in downstream pressure can be created by pumps temperature increases in boilers etc. Reductions in potable water supply pressure occur whenever the amount of water being used exceeds the amount of water being supplied such as during water line flushing fire fighting or breaks in water mains. Backsiphonage (a vacuum) can occur when there is a stoppage of water supply due to nearby fire fighting a break in a water main etc.How can I stop potentially dangerous backflow situations or avoid them all together?Irrigation systems make watering lawns and gardens easier and save time BUT water that may be contaminated by weed killers and/or fertilizers can backflow into the home's drinking water. Irrigation systems not protected by approved backflow prevention assemblies could endanger the health of a household neighborhood or community. Steps can be taken to prevent this dangerous situation.First ensure that a proper backflow preventer is installed and maintained. A backflow preventer is a mechanism to prevent backflow which provides a physical barrier to backflow. The principal types of mechanical backflow preventer are the reduced-pressure principle assembly the pressure vacuum breaker assembly and the double check valve assembly. A secondary type of mechanical backflow preventer is the residential dual check valve.All irrigation systems new or existing should be equipped with an approved backflow prevention assembly. Only properly installed state-approved backflow prevention assemblies meet the plumbing code and provide health protection for family and neighbors.

A5: Yes. A homeowner or a plumber can use manufacturer's instructions for adjustment. The adjustment mechanism is usually a screw on top of the regulator. Turning this screw changes the degree of spring compression. Generally, turning the screw clockwise increases house water pressure and turning the screw counter-clockwise reduces house pressure. Repair kits for rebuilding pressure regulators are usually available from the manufacturer.

When nonpotable water or other substances flow through a cross-connection and into the piping of a public water system or consumer's potable water system it is called backflow. Backflow can be caused by a downstream pressure that is greater than the supply pressure or by negative pressure (a vacuum). Increases in downstream pressure can be created by pumps temperature increases in boilers etc. Reductions in potable water supply pressure occur whenever the amount of water being used exceeds the amount of water being supplied such as during water line flushing fire fighting or breaks in water mains. Backsiphonage (a vacuum) can occur when there is a stoppage of water supply due to nearby fire fighting a break in a water main etc.

A4: The best way to know if the pressure regulator is working is to install a pressure gauge on each side of the regulator. If the upstream gauge reads higher than the downstream gauge, then the regulator is probably working. Some symptoms of pressure regulator malfunction include sustained or initial bursts of unusually high pressure at faucets and shower heads and water being discharged from the relief valve on your domestic water heater. Sudden loss in pressure is another sign of a malfunctioning regulator.