ASME A112.18.8:2020 pdf free download – Sanitary Waste Valves for Plumbing Drainage Systems
1.1 Scope
This Standard establishes minimum requirements for materials in the construction of a sanitary waste valve (here-inafter referred to as “the valve”) for use as an alternate to a tubular p-trap.This Standard prescribes minimum testrequirements for the performance of the valve together with methods of marking and identification.This Standard doesnot define the requirements for products to be used in urinals or water closets. lt is not intended that products meetingthis Standard will be used in a urinal or water closet.
The provisions of this Standard are not intended to prevent the use ofany alternate material or method of constructionprovided any such alternate meets the intent of this Standard.
1.2 Units of Measurement
Values are stated in U.S.Customary units and in the International System ofUnits (SI).The U.S.Customary units shallbeconsidered as the standard.
In this Standard,gallons (U.S.liquid)per minute is abbreviatedgpm, andliters(metricliquid)per minute isabbreviatedL/min.
1.3 References
The following documents form a part of this Standard to the extent specified herein.Unless otherwise specfied thelatest edition shall apply.
ANSI/ASSE 1051-2009, Individual and Branch Type Air Admittance Valves for Plumbing Drainage Systems
Publisher: American Society of Sanitary Engineering (ASSE),901 Canterbury Road, Westlake,OH 44145(www.asse-plumbing.org)
ASME A112.18.2/CSA B125.2,Plumbing Waste FittingsASME B1.20.1,Pipe Threads, General Purpose (Inch)
Publisher: The American Society of Mechanical Engineers (ASME),Two Park Avenue, New York, NY 10016-5990(www.asme.org)
ASTM D2000, Standard Classification System for Rubber Products in Automotive Applications
ASTM D2661, Standard Specification for Acrylonitrile-Butadiene-Styrene (ABS) Schedule 40 Plastic Drain, Waste, andVent Pipe Fittings
ASTM D2665, Standard Specification for Poly(Vinyl Chloride) (PVC) Plastic Drain, Waste, and Vent Pipe and FittingsASTM F409, Standard Specification for Thermoplastic Accessible and Replaceable Plastic Tube and Tubular Fittings Publisher:American Society forTesting and Materials(ASTMInternational),100 BarrHarbor Drive, WestConshohocken,PA 19428-2959 (www.astm.org)
1.4 Definitions
bladder/checking member: the component of the sanitary waste valve that provides the sealing function.
sanitary waste valve: a product used as an alternate to a water-filled tubular waste trap that provides protection for theproperty from foul air in the sewer.
2.4.4 If required,a straight-running adapter shall be available to allow the valve to be connected to the pipe rather thanthe fixture outlet.
2.5 Valve Outlet
The valve outlet shall have a connection that is compatible with tubing or pipe complying with ASTMF409,ASTMD2661, or ASTM D2665 or threaded connections complying with ASME A112.18.2/CSA B125.2.
2.6 Threaded Connections
All threads that connect to external fixtures shall comply with ASME B1.20.1.3 TESTING
3.1 Waterway Flow Rate
3.1.1 Test Method.Connect the valve to the waste outlet hole of the tank in accordance with Figure 3.1.1-1 and themanufacturer’s installation instructions. Fill the test tank with water up to the test level. Stabilize the test level byadjusting the water inflow by means of the regulating valve. When the test water level is stabilized, the flow rateof the valve is indicated by the flowmeter.