Reduced Pressure Backflow Preventer definition

Reduced Pressure Backflow Preventer means a device containing within its structure a minimum of two independently acting approved check valves, together with an automatically operating pressure differential relief valve located between the two check valves.
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Reduced Pressure Backflow Preventer means an assembly of two independently acting soft seated approved checkvalves, together with an independent differential pressure relief valve located between the checkvalves. The unit shall contain properly located test cocks and resilient sealed shutoff valves at each end of the assembly. To be approved these assemblies must be accessible for inspection and testing and be installed in an aboveground location with no part of the assembly being subject to submersion.
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Reduced Pressure Backflow Preventer means an assembly of two independently acting approved check valves together with a hydraulically operating mechanically independent pressure relief valve located between the check valves and at the same time below the first check valve. The unit shall include properly located resilient seating test cocks and tightly closing resilient seating shut-off valves at each end of the assembly. The entire assembly shall meet the design and performance specifications as determined by a laboratory and a field evaluation program resulting in an approval by a recognized testing agency for backflow prevention assemblies. The assembly shall operate to prevention assemblies. The assembly shall operate to maintain the pressure in the zone between the two check valves at an acceptable level less than the pressure on the public water supply side of the assembly. At cessation of a normal flow the pressure between the two check valves shall be less than the pressure on the public water supply side of the device. In case of leakage either of the check valves, the differential relief valve shall operate to maintain the reduced pressure in the zone between the check valves by discharging to the atmosphere. To be approved, these assemblies must be readily accessible for in-line testing and maintenance and be installed in a location where no part of the assembly will be submerged.
Sample 1

Examples of Reduced Pressure Backflow Preventer in a sentence

  • DESCRIPTION REQ'D Required RO Revised Ordinances, City and County of Honolulu RP Reduced Pressure Backflow Preventer SE Screwed End SJ Slip Joint SP Special Provision SQ Square SS Stainless Steel STD Standard STL Steel T & B Top & Bottom THK Thick TV Top Vertical TYP Typical UBC Uniform Building Code UL Underwriters’ Laboratories, Inc.

  • AG- Air Gap AVB- Atmospheric Vacuum BreakerRPBP- Reduced Pressure Backflow Preventer PVB- Pressure Vacuum BreakerDCVA- Double Check Valve Assembly BPIAV- Backflow Preventer with Intermediate Atmospheric Vent Acceptable Types of Backflow Preventers Types of Hazard on Premises22.22(9)(d)1.

  • Air GapRPBP - Reduced Pressure Backflow Preventer DCVA - Double Check Valve AssemblyAVB - Atmospheric Vacuum Breaker PVB Pressure Vacuum BreakerBPIAV - Backflow Preventer with Intermediate Atmospheric Vent Types of Hazard on PremisesAcceptable Types of Backflow Preventers Comments*AGRPBPDCVAAVBPVBBPIAV1.

  • Fire Protection System Isolation for New, Severe Hazard Facilities: ● A fire protection system installed within a new facility categorized as a high cross-connection hazard shall itself require a Reduced Pressure Backflow Preventer.

  • The Reduced Pressure Backflow Preventer requires a gravity drain to daylight, or to a storm sewer system of sufficient size to carry the flow from the Reduced Pressure Backflow Preventer, should it be necessary.

  • Single-plate, solar hot water heat exchangers installed in an industrial-commercial- institutional Facility shall require Premises Isolation using a Double Check Backflow Preventer (or Reduced Pressure Backflow Preventer if required by the Cross Connection Hazard classification of the Facility) in addition to a Reduced Pressure Backflow Preventer located at the make-up water connection.

  • A stainless steel-bodied Reduced Pressure Backflow Preventer shall be installed in the water line supplying the carbonator beverage dispensing equipment.

  • I (we) further understand and agree that should an auxiliary water supply be connected to the public water system at the above address, maximum cross connection control equipment in the form of an approved air gap or Reduced Pressure Backflow Preventer shall be installed to protect the public water supply.

  • Only in very exceptional circumstances will students with outstanding failures be admitted to a higher level award Wherever possible, students wishing to continue from the PGCert or the PGDip to a higher level award should request to do so at least 3 weeks prior to completing the requirements for their original award.

  • When activating a hydrant insure the hydrant is turned fully open to prevent damaging the hydrant.


More Definitions of Reduced Pressure Backflow Preventer

Reduced Pressure Backflow Preventer means a device to eliminate the potential for backflow or back siphoning of non-potable water into the municipal water supply.
Sample 1
Reduced Pressure Backflow Preventer means an assembly consisting of two (2) independently operating approved check valves with an automatically operating differential relief valve located between the check valves. Tightly closing shut-off valves are located on each end of the check valves, and properly located test cocks are positioned for the testing of the check valves and the relief valve. This device is approved for High Hazard category cross connections, and may never be installed in a location or manner which will subject the device to possible flooding or allow the relief valve to become submerged under water.
Sample 1
Reduced Pressure Backflow Preventer means a testable Backflow Preventer that consists of two independently-acting, spring-loaded check valves separated by a spring-loaded differential pressure relief valve, two shutoff valves and four test cocks. A Reduced Pressure Backflow Preventer is typically used to provide protection against a Backflow from Severe Cross Connection Hazards.
Sample 1

Related to Reduced Pressure Backflow Preventer

  • Backflow preventer means any device or means to prevent backflow;

  • Backflow prevention device means a safety device used to prevent pollution or contamination of the water supply due to the reverse flow of water from the irrigation system.

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  • Backflow Prevention Assembly means any mechanical assembly installed at a water service line or at a plumbing fixture to prevent a backflow contamination event, provided that the mechanical assembly is appropriate for the identified contaminant at the cross connection and is an in-line field-testable assembly.

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