ASME A112.18.8:2020 pdf free download Sanitary Waste Valves for Plumbing Drainage Systems
GENERAL
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. It is not intended that products meetingthis Standard will be used in a urinal or water closet.
The provisions of this Standard are notintended to prevent the use of any 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 InternationalSystem ofUnits (SI).TheU.S.Customary units shall beconsidered as the standard.
In this Standard,gallons(U.S.liquid)per minute isabbreviatedgpm,and liters(metricliquid)per minute is abbreviatedL/min.
1.3 References
The following documents form a part of this Standard to the extent specified herein.Unless otherwise specified, 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 FittingsPublisher: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 GENERAL REQUIREMENTS2.1 Material
The valve shall meet the material requirements of ASTM F409.The valve shall be installed in an accessible location.2.2 Seal Material
Seal materials shall comply with or exceed classification M3BA507A14B13 C12F17 orM2BG714B14 EO14 EO34 ofASTM D2000.
2.3 Bladder/Checking Member Material
Bladder/checking member material shall comply with or exceed classification M3FC607 EA14 EO16 G11 of ASTMD2000.
2.4 Valve Inlet
2.4.1 The valve inlets shall be 1 1/4 in.(31.8mm) or 1’/2 in.(38.1 mm) nominal straight or with an 87’/-deg elbow or bestandard pipe size straight inlets (see Figure 2.4.1-1).
2.4.2The base of the thread may be sealed by a sealing washer (inlet set) at the base of the thread.The useful threadlength shall be between 3% in.(9.5 mm) and ‘/2 in.(12.7 mm).All threaded fixture outlets shall have a minimum three-thread engagement for fittings and plastic nuts to correctly engage and energize the inlet seal in accordance with ASTMF409.
2.4.3 If required for horizontal installations, an 871/2-deg knuckle adapter shall be available to allow the valve to beconnected in a horizontal position.When installed in a horizontal position, the device and connected piping shall have aminimum slope of 1:48 [i.e., ‘/4 in./ft (21 mm/m)].
ASME A112.18.8:2020 pdf free download
