Backflow Preventers

Pro-Series 3/4" Atmospheric Backflow Preventers are designed to prevent dangerous backflow into a potable water supply. This backflow preventer in a chrome finish can be used around homes, schools, commercial buildings, laboratories and any place involving moveable hoses that are attached to threaded faucets, indoors or out. It attaches to any standard male 3/4" hose-thread sill cock and is fitted with a male outlet connection to permit garden hose attachment. The Pro-Series backflow preventer is designed for systems with a maximum pressure of 125 psi and a maximum temperature of 180° F. When backflow conditions occur, due to back pressure or back-siphonage, the seat and diaphragm close to prevent any water from flowing back through the unit and into the water supply line. At the same time, the diaphragm lifts off the vent holes to break any vacuum, and any water is llowed to escape through the vent holes.

For use in any place involving moveable hoses attached to threaded faucets:

Includes protruding tip device for manual draining of faucet after hose removal to prevent freezing

ASSE 1011, CSA and IAPMO compliant

Features a breakaway set screw

Series 9D is specially made for smaller supply lines and ideally suited for laboratory equipment, processing tanks, sterilizers, dairy equipment and similar applications. It is particularly recommended for boiler feed lines to prevent backflow when supply pressure falls below system pressure. Series 9D is suitable for use on hot or cold water and can be used under continuous pressure. It features a primary check valve utilizing a rubber disc seating against a mating rubber part to ensure tight closing. A secondary check valve utilizes a rubber disc-to-metal seating. In the event of fouling of the downstream check valve, leakage would be vented to atmosphere through the vent port thereby safeguarding the potable water system. Construction is brass body with stainless steel working parts, integral strainer and durable rubber discs. Female union inlet and outlet connections. Sizes 1/2" and 3/4". Drain is 1/2" thread connection.

True line-sized construction allows the check modules to open further allowing dirt and debris to pass more freely reducing check fouling

Stainless steel internal parts

Maximum flow at low pressure drop

Furnished with union connections to facilitate removal and replacement for maintenance

Compact for economy combined with performance

Design simplicity for easy maintenance

Can be installed vertically or horizontally

Series LFNLF-9 lead free dual check vacuum breakers for laboratory faucets prevent the reverse flow of polluted water from entering into the potable water supply. It consists of a brass body construction with chrome plating, dual check valves, stainless steel working parts, and durable rubber diaphragm and discs. Series LFNLF-9 is designed for health hazard, non-continuous pressure applications. It is specifically designed for laboratory faucets where portable hoses can be attached.

This valve shall be manufactured in America. The bronze body shall be configured with "wye" style checks for in-field serviceability. The device shall be available with options for three test cocks for in-line testing. The Apollo® model DUCLF40 dual check valves prevents backflow by either backpressure or back-siphonage resulting from a cross-connection between potable water lines and substances that are objectionable, but not health-hazards.

In-line repairable

Low pressure loss

Corrosion resistant

Compact and lightweight

Independently acting check valves

Brass cap, stainless steel spring, EPDM seat disc

Series 9D is suitable for use on hot or cold water and can be used under continuous pressure. It features a primary check valve utilizing a rubber disc seating against a mating rubber part to ensure tight closing. A secondary check valve utilizes a rubber disc-to-metal seating. In the event of fouling of the downstream check valve, leakage would be vented to atmosphere through the vent port thereby safeguarding the potable water system. Construction is brass body with stainless steel working parts, integral strainer and durable rubber discs. Female union inlet and outlet connections. Sizes 1/2" (15 mm) and 3/4" (20 mm). Drain is 1/2" (15 mm) thread connection.

Dual check valves with intermediate atmospheric vent prevent the reverse flow of hot or cold polluted water from entering into the potable water supply

Consists of an integral strainer and two durable, tight-sealing, check valves

True line-sized construction allows the check modules to open further allowing dirt and debris to pass more freely reducing check fouling

Maximum flow at low pressure drop

Furnished with union connections to facilitate removal and replacement for maintenance

Compact for economy combined with performance

Design simplicity for easy maintenance

Can be installed vertically or horizontally

Series 911 combination fill valve and backflow preventer consists of a model 9D backflow preventer and model 1156F feed water pressure regulator in one pre-assembled unit. This valve is designed for use on boiler feed lines to provide make up water to the boiler and prevent backflow when supply pressure fails below system pressure.

Pre-assembled for ease-of installation

Easy service accessibility

High capacity fill valve for quick system filling and purging

Series 9D is suitable for use on hot or cold water and can be used under continuous pressure. It features a primary check valve utilizing a rubber disc seating against a mating rubber part to ensure tight closing. A secondary check valve utilizes a rubber disc-to-metal seating. In the event of fouling of the downstream check valve, leakage would be vented to atmosphere through the vent port thereby safeguarding the potable water system. Construction is brass body with stainless steel working parts, integral strainer and durable rubber discs. Female union inlet and outlet connections. Sizes 1/2" (15 mm) and 3/4" (20 mm). Drain is 1/2" (15 mm) thread connection.

Dual check valves with intermediate atmospheric vent prevent the reverse flow of hot or cold polluted water from entering into the potable water supply

Consists of an integral strainer and two durable, tight-sealing, check valves

True line-sized construction allows the check modules to open further allowing dirt and debris to pass more freely reducing check fouling

Maximum flow at low pressure drop

Furnished with union connections to facilitate removal and replacement for maintenance

Compact for economy combined with performance

Design simplicity for easy maintenance

Can be installed vertically or horizontally

Series 911 combination fill valve and backflow preventer consists of a model 9D backflow preventer and model 1156F feed water pressure regulator in one pre-assembled unit. This valve is designed for use on boiler feed lines to provide make up water to the boiler and prevent backflow when supply pressure fails below system pressure.

Pre-assembled for ease-of installation

Easy service accessibility

High capacity fill valve for quick system filling and purging

Series 009 reduced pressure zone assemblies are designed to protect potable water supplies in accordance with national plumbing codes and water authority requirements. This series is designed to protect drinking water supplies from dangerous cross-connections in accordance with national plumbing codes and water authority requirements for non-potable service applications such as irrigation, fireline, or industrial processing.

Features two in-line, independent check valves, captured springs and replaceable check seats with an intermediate relief valve

Its compact modular design facilitates easy maintenance and assembly access

Single access cover and modular check construction for ease of maintenance

Top entry - all internals immediately accessible

Captured springs for safe maintenance

Internal relief valve for reduced installation clearances

Replaceable seats for economical repair

Large body passages provides low pressure drop

Compact, space saving design

No special tools required for servicing