ASME A112.19.8B:2009 pdf free download

ASME A112.19.8B:2009 pdf free download.Suction Fittings for Use in Swimming Pools,Wading Pools,Spas, and Hot Tubs.
1.1.1 General Requirements. This Standard establishes materiaLs, testing, and marking requirements for suction fittings that are designed to be totally submerged for use in swimming poois, wading poois, spas, and hot tubs, as well as other aquatic facilities.
1.1.2 DefinItion. Suction fittings shall be defined as all components, including the sump and/or body, cover/grate, and hardware.
1.1.3 Compliance. Demonstration of compliance for this Standard is merely an indication that the product meets performance requirements and specifications contained in this Standard.
1.1.4 Revisions. The provisions of this Standard shall not be construed to prevent the use of any alternate material or method of construction provided any such alternate meets the full intent of the standard.
1.1.5 Exclusions
1.1.5.1 Skimmers shall be excluded from evaluation to this Standard.
1.1.5.2 Vacuum connection covers shall be excluded from evaluation to this Standard.
1.1.6 Types of Suction Fittings
1.1.6.1 General. A manufacturer or designer of any suction outlet cover/grate shall indicate under which Type the cover/grate is listed.
1.1.6.2 FIeld Fabricated Outlets. All nonmanufactured suction outlets constructed in the field with individual components shall be considered as “Field Fabricated Outlets.”
1.1.6.3 Venturi Outlets. All venturi activated indirect-suction outlets or venturi activated debris collection systems shall be considered as “Venturi Outlets.”
1.1.6.4 Swim jet Combination Fittings. All swim jet combination fittings that combine suction and discharge into one housing, creating a high velocit high volume stream of water to swim, jog, or walk against, as well as massage, shall be considered “Swim Jet Combination Fittings.”
4.2.8 The flow rate shall be increased in 5 gpm (19 L/min) increments ±3% and ten tests shall be performed at each flow rate. Brush hair prior to each test to keep tangle-free.
4.2.8.1 With the test pump still operating, the amount of force necessary to free the hair from the fitting shall be measured. The skull or dowel shall be attached to the scale and the scale shall be zeroed and then pulled in a vertical orientation away from the fitting by activating the hair removal mechanism. The force of the entrapment shall be measured and recorded. A sample reporting form for recording the data is provided in Nonmandatory Appendix A.
4.2.8.2 Where a failure is determined with a specific 5 gpm (19 1/mm) increase, the unit shall be permitted to be retested in 1 gpm (3.8 L/min) increments up to the point of the previous failure in order to determine the rating under this section.
4.3 Performance Requirement
A pull of 5 lbf (22 N) or greater on any one of the ten tests, including the equalized weight of the saturated test apparatus, shall be deemed a failure, and the flow rate in gpm at failure shall be recorded. If one failure in ten pulls occurs, repeat the test ten more times. All additional tests shall pass before moving to the next value. The highest passing flow rate shall be divided by 1.25 to determine the maximum allowable rating of the suction fitting unless the manufacturer has set a lower flow rate which then shall be the rating of this fitting.
S BODY ENTRAPMENT
5.1 General
5.1.1 Design and InstalLation. Suction fittings shall be designed and installed so as to reduce the potential for body entrapment. The potential for body entrapment is addressed by the proper selection of the size of outlet cover/grate or the proper installation of more than one suction outlet.
5.1.2 Fittings
5.1.2.1 Body Entrapment Test shall apply to all littings and suction outlets covered under this Standard. For manufactured fittings only one new fitting shall be required to be tested.
5.1.2.1.1 Self-contained spa fittings shall be (ii tested for conformance with section 5, Body Entrapment, using a single-outlet configuration The Body Entrapment Test shall not be performed using the configuration of para. 4.2.2.1.
5.1.2.2 Suction outlet cover/grates that can not be completely covered by the 18 in. x 23 in. (457 mm x 584 mm) body blocking element may be rated.