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ASME A112.19.7-2012 pdf download

ASME A112.19.7-2012 pdf download.Hydromassage bathtub systems.
3 Definitions and abbreviations 3.1 Definitions The following definitions shall apply in this Standard: Accessible — accessible by removing an access panel, door, or similar obstruction, using tools. Circulation system — the inlets, outlets, pumps, air induction systems, valves, piping or tubing, fittings, and other appurtenances used to circulate water from a hydromassage bathtub system. Note: The circulation system can be factory or field assembled, and it can be independent or interconnected. Disintegrate — to lose any material from a fitting, exclusive of plating or finish. Fixture — a device that receives water, waste matter, or both and directs these substances into a drainage system. Hydromassage bathtub system — a plumbing system that incorporates one or both of the following: (a) water jets, with or without air introduced by integral suction. The water jets include a water recirculation system with self-draining piping and a water pump; and (b) an air induction system that introduces air into the system through jets using a blower or air pump. Note: A hydromassage bathtub system can be piped or unpiped (e.g., a pipeless whirlpool bathtub). Jet — a fitting that creates a high-velocity stream of water with or without induction of air. Pipeless whirlpool bathtub — a bathtub equipped with one or more unitized jet/suction fittings to circulate water without piping and discharge the water after each use. Plumbing appurtenance — a manufactured device, prefabricated assembly, or field assembly of component parts that is an adjunct to the basic piping system and plumbing fixture. Note: An appurtenance demands no additional water supply, nor does it add any discharge load to a fixture or the drainage system. Standard liquid detergent — a mixture of 8.0% tetrapotassium pyrophosphate, 7.0% ethoxylated-alkyl-phenol, 8.0% sodiumxylenesulfonate, 1 .5% butyl cellosolve, and 75.5% water, measured by volume. Notes: The following commercial products are acceptable: (a) tetrapotassium pyrophosphate: Monsanto TKPP; (b) ethoxylated-alkyl-phenol: Monsanto Sterox NJ or Rohm & Haas Triton X-100; (c) sodiumxylenesulfonate: Stepan Chemical Co. Stepan SXS; and (d) butyl cellosolve: 2-butoxy ethanol. Unitized jet/suction fitting — an apparatus with a means for circulating water in a whirlpool bathtub without routing the water through the circulation system.
3.2 Abbreviations The following abbreviations shall apply in this Standard: ABS — acrylonitrile-butadiene-styrene CPVC — chlorinated polyvinylchloride GFCI — ground fault circuit interrupter ID — inside diameter OD — outside diameter PEX — crosslinked polyethylene PVC — polyvinylchloride 4 General requirements 4.1 Electrical components The electrical components of hydromassage bathtubs shall comply with CSA C22.2 No. 21 8.2 or UL 1 795. 4.2 Plumbing fixtures Plastic bathtubs shall comply with CAN/CSA-B45.5 or IAPMO/ANSI Z1 24.1 .2. Enamelled cast iron and enamelled steel bathtubs shall comply with ASME A1 1 2.1 9.1 /CSA B45.2. 4.3 Plumbing supply fittings Plumbing supply fittings shall comply with ASME A1 1 2.1 8.1 /CSA B1 25.1 and plumbing waste fittings shall comply with ASME A1 1 2.1 8.2/CSA B1 25.2. 4.4 Piping and tubing 4.4.1 Copper Copper water tubes shall be not less than Type M. 4.4.2 Plastic Acrylonitrile-butadiene-styrene (ABS) and polyvinylchloride (PVC) piping and tubing may be rigid or flexible. Fittings and rigid tubing shall be at least Schedule 40. Chlorinated polyvinylchloride (CPVC) piping shall be at least SDR-PR. Crosslinked polyethylene (PEX) tubing shall comply with the dimensional tolerances specified in the appropriate PEX standard. 4.4.3 Flexible hoses Flexible hoses shall comply with IAPMO PS033. 4.4.4 Alternative materials Piping made of alternative materials shall be acceptable if it meets all of the performance requirements of this Standard.
4.5 Solvent cements for use with flexible piping Solvent cements used in the assembly of the recirculation piping of hydromassage bathtubs shall (a) be used in accordance with the solvent cement manufacturer’s instructions; and (b) be suitable for jointing flexible PVC pipe to rigid PVC fittings. 4.6 Suction fittings Suction fittings shall comply with Clauses 5.3 and 5.4. 4.7 Circulation system installation 4.7.1 Rigid and flexible piping and tubing shall be installed to allow for drainage of the water from the circulation system in accordance with Clause 5.2. Flexible tubing shall be provided with support to reduce sagging in accordance with the tubing manufacturer’s instructions. 4.7.2 Pumps shall be connected to the circulation system in such a way that they can be removed, repaired, or replaced. 4.7.3 When a self-draining volute is not provided, a means to drain the pump volute, e.g., 6.4 mm (0.24 in) ID tubing, shall be provided. The volute drain opening in a self-draining pump shall be not less than 4.8 mm (0.1 875 in) ID. 4.7.4 The separation between multiple suction fittings shall be at least 305 mm (1 2 in). The fittings shall be in different planes. 4.7.5 The circulation system shall be watertight. Leakage from the circulation system during testing shall be cause for rejection. 4.8 Pump or blower The location of the pump or blower shall be determined by the manufacturer. A means to fasten the pump or blower shall be provided.

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