ASME A112.19.17-2010 pdf download.Manufactured Safety Vacuum Release Systems (SVRS) for Residential and Commercial Swimming Pool, Spa, Hot Tub, and Wading Pool Suction Systems.
1 GENERAL 1.1 Scope This Standard establishes general requirements, dimen- sions and tolerances, materials, installation instructions, testing requirements, and markings and identification for SVRS devices. SVRS devices are intended to be utilized on pool, spa, hot tub, and/or therapy unit suction systems. SVRS devices covered under this Standard are designed to relieve high vacuum occurrences that cause human body or body part suction entrapment. Demonstration of compliance with this Standard is merely an indication that the product meets the perfor- mance requirements and specifications contained in this Standard. The provisions of this Standard are not intended to prevent the use of any alternative material or method of construction, provided any such alternative meets the intent and requirements of this Standard. 1.2 Units of Measurement Values are stated in U.S. Customary units and in the International System of Units (SI). The U.S. Customary units shall be considered as the standard. In this Standard, gallons (U.S. liquid) per minute is abbreviated as “gpm” and liters (metric liquid) per minute is abbreviated as “L/min”. 1.3 References The following documents form a part ofthis Standard to the extent specified herein. Unless otherwise specified, the latest edition shall apply. ASME A112.19.8b–2009, Suction Fittings for Use in Swimming Pools, Spas, Hot Tubs, and Whirlpool Bath Appliances. ASME B1.20.1 , Pipe Threads, General Purpose, Inch Publisher: The American Society of Mechanical Engineers (ASME) Three Park Avenue, New York, NY 10016-5990; Order Department: 22 Law Drive, P.O. Box 2900 Fair- field, NJ 07007–2900, (www.asme.org) ASTM D 2466, Poly (Vinyl Chloride) (PVC) Plastic Pipe Fittings, Schedule 40 ASTM D 2468, Acrylonitrile‐Butadiene‐Styrene (ABS) Plastic Pipe Fittings, Schedule 40 Publisher: American Society for Testing and Materials (ASTM International), 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959 (www.astm.org) NSF‐50, Suction System Components For Swimming Pools, Spas, Tubs, And Whirlpools Publisher: National Science Foundation (NSF Interna- tional), 789 North Dixboro Road, Ann Arbor, MI 48105 (www.nsf.gov)UL 1081, Standard For Safety For Swimming Pool Pumps, Filters, and Chlorinators Publisher: Underwriters Laboratories, Inc. (UL), 333 Pfingsten Road, Northbrook, IL 60062-2096 (www.ul.com) 1.4 Definitions blocking element: the part used to simulate an entrapped victim constructed ofa 12 in. (305 mm) × 12 in. (305 mm) (tolerance = ± 0.25 in.) maximum 5 in. (127 mm) thick closed cell foam block with a covering of Buna-N rubber sheet having a minimum of 1 / 8 in. (3 mm) thickness and Shore A durometer 60 ± 5 or equivalent whose combined buoyancy force is between 14.0 lbf (62.2 N) and 15.0 lbf (66.7 N). cycle: a sequence where the SVRS activates, latches, or locks out in the vented or safe position following a high vacuum occurrence and then is automatically or manually reset. floodedsuction: a pool, spa, hot tub, wading pool, or similar appliance whose circulation system pump suction inlet or inlets are located below the static water level in the appliance (flooded suction). high vacuum occurrence: an event where the operating vacuum normally present within a pool circulation system increases due to a full suction outlet blockage.
Safety Vacuum Release System (SVRS): a system or device capable of automatically providing vacuum release at a suction outlet caused by a high vacuum occurrence due to a suction outlet flow blockage. The device or system provides vacuum release with or without suction fitting cover(s) in place. suction lift: a pool, spa, hot tub, wading pool, or similar appliance whose circulation system pump suction inlet or inlets are located above the static water level in the appliance (nonflooded suction). suction outlet: an appurtenance within a pool, spa, hot tub, wading pool, or similar appliance for conveying water into a circulating system; i.e., a pump suction. suction system: that portion of the circulation piping located between the pool suction outlet and the inlet side of the pump and usually includes the following: main suction outlet piping, skimmer piping, and/or vacuum piping. 2 REQUIREMENTS 2.1 General 2.1.1 Field‐adjustable SVRS devices when provided with a vacuum gauge shall have a maximum graduation of 1 / 2 in. (13 mm) Hg increments to aid in calibration and trouble shooting.