Reduced pressure zone rpz assembly needs to be tested annually and rebuilt every 5 years. Place check valve disc into check valve disc holder then place check valve disc retainer washer with shiny side down and dull side up over the check valve. Installation, operation, maintenance and parts manual for backflow. Rpz valve one stop solution to all your rpz valve requirements.
After the installation of a model rpz unit has been completed, place the unit in service as follows. Floguard rpz valve design function maintenance the floguard rpz valve includes all components determined in en 1717 and is designed as a 3 pressurezone system with controllable upstream, intermediate and downstream pressure zones. Who is responsible for the testing and maintenance of the backflow preventers. The assembly should be installed in a horizontal position with a minimum clearance of 12 between the relief valve discharge port and floor or grade, and a minimum of 18 horizontal clearance around the unit for access and ease of testing and maintenance of the relief valve. Close the high side bleed needle valve, then close the low side bleed needle valve after the gauge reading has reached the upper end of the scale. Backflow preventer maintenance and installation tips. Backflow prevention device commission, inspection and maintenance report please complete this form using block letters and tick the appropriate boxes. The most versatile line of backflow prevention assemblies on the market.
Results must be recorded in the otrs official commission, inspection and maintenance report. Jul 19, 2017 this video shows how to disassemble and repair a reduce pressure backflow assembly to stop the valve from leaking water and failing the required test. Reduce pressure zone rpz or reduced pressure backflow assembly rpba two independently acting check valves together with a hydraulically operating, mechanically independent pressure differential relief valve located between the check valves and below the first check valve. Slowly open the inlet shutoff valve until the backflow preventer is completely pressurized. Reduced pressure zone rpz backflow preventer commercial model product code a b c rpzv255000 12 223mm 188mm rpzv255005 34 293mm 245mm rpzv255010 1 301mm 268mm rpzv255015 1 14 432mm 359mm rpzv255020 1 12 436mm 359mm rpzv255025 2 454mm 359mm uk 0800 389 5931 technical specification sheet a c b rpzcom0010718. For other repair kits and service parts, refer to our. Operation and maintenance manual reduced pressure backflow. Consumers the water supply water fittings regulations and byelaws in scotland set out the legal requirements for plumbing systems and play an important role in protecting public health, safeguarding water supplies and promoting the efficient use of water within customers premises.
Rpz valves sometimes referred to as type ba devices can protect against backflow at the point of use from a possible contamination of fluid up to category 4. Include thepressuredrop across first check valve the differential between second and third test cocks. Report on test and maintenance of backflow prevention device. Include the line pressure taken at number 1test cock with shutoff valve number closed. Rpzds may also be known as reduced pressure principle rp, reduced pressure principle backflow prevention devices, reduced pressure zone assemblies rpza, or reduced pressure principle assembly rppa.
Double check valve assembly series 2000dca 4 10 100 250mm. If there are private hydrants on site, the customer must sign a hydrant maintenance agreement. We hope that you enjoyed reading our blog on backflow preventer maintenance. Describe repairs, parts and materials used, replacement of assembly details of procedures. For other repair kits and service parts, refer to our backflow. Featuring an 80% shorter lay length, the lowest head loss, and cost saving benefits. Backflow prevention device commission, inspection and. Rpz valve shall only be carried out by person a competent to ing and carry out commission compliance testing of rpz valve. These units are located between two tightly closed resilient seated. The number of rpz valves requiring testing or work. Permission of the valve owner to close off the water supply for the duration of the test or work. Rpz valve supply, installation, maintenance and testing. All commissioning and testing of these valves needs to be carried out in accordance with the water suppliers approved installation method aim0801 and must only be carried out by approved test engineers who have.
The reduced pressure zone rpz valve is a device which protects against backflow, providing cost effective protection against the contamination of mains cold water supply. The assembly should be installed in a horizontal position with a minimum clearance of 12 between the relief valve discharge. At least 200m clear space above the rpz valve for maintenance. If the check valve seat ring or spring is damaged, call for a complete replacement check valve. Our accredited rpz valve engineers work through out the uk. If you are in need of an emergency plumber in washington dc for this kind of job, just call us.
Public health officials have long been concerned about crossconnections and backflow prevention as early as the turn of the century. Requirements for installation, onsite testing and maintenance. Regulations rpz valve supply, installation, maintenance and. Rpzs are typically installed onto lawn irrigation, boilers that fire over 200,000 btus, fire suppression systems, and food or chemical processing equipment. Reduced pressure zone valve installation instructions.
To do so, unbolt the relief valve and turn the relief valve discharge port to the opposite side. With this in mind, the commissioning, testing and maintenance of rpz valves should only be carried out by an accredited tester and a current list of these can be. Reduced pressure zone valve installation instructions model rpz 212 10 flomatic corporation flomatic corp, 15 pruyns island, glens falls, new york 12801 phone. Backflow prevention requirements for toilet seat douche. Test methods and maintenance regimes shall be in accordance with the water. If you need help with the lodgement of backflow inspection and maintenance reports, contact sydney. The overall objective of the performance criteria is to establish a baseline to ensure the sanctity of drinking water. A reduced pressure zone device rpzd, rpz, or rpz valve is a type of backflow prevention device used to protect water supplies from contamination. Open the high side bleed needle valve to bleed all air from the hose and gauge. Failure to read and follow all safety and use information. The pressure drop across the first check valve is approximately 7. Regulations rpz valve supply, installation, maintenance.
Tighten the packing gland to the appropriate torque for the valve. What is rpz rpz installation, inspection, plumbing, nyc. However, it wasnt until 1974, when congress established the safe drinking water act sdwa, that unprotected crossconnections were required to be eliminated or protected in order to safeguard human health from contaminants in drinking water. Plumbers 911 washington dc will refer you the most trusted plumbers that provide 24 hour plumbing service in washington dc such as backflow testing in washington dc. Reduced pressure zone valves are backflow protection devices and need to be checked on an annual basis to ensure continual capability of backflow protection. If check valve disc is damaged then call a service center or factory for a rubber kit. C opening of rpz differential pressure relief valve must be at least 2. Each pressure zone is supplied with a ball valve allowing to verify. Site specific requirements all factors that will affect the work taking place, including but not limited to.
For other repair kits and service parts, refer to our backflow preven tion products. Our highlyskilled workforce can be contracted to your premises periodically to run checks on your valves to prevent the backflow of fluid from connections between potable and nonpotable water supplies. Double check valve dcv assembly needs to be tested every 3 years. The approved bonnet and poppet as manufactured by febco may be visually identified by the light gold transparent color of the parts. Remove the valve from the system and place it securely in a vice. For rpz devices, the pressure drop accross the check valve must be at least 5. In the uk, the rpz valve must be tested at least every 12 months by an accredited tester. Apollo engineering team sponsors uncc student project. All testable backflow prevention devices must also be tested annually by a licensed plumber and the results recorded in the otrs official commission, inspection and maintenance report.