14 ASPE Plumbing Engineering Design Handbook — Volume 1 Table 1-1 Standard Plumbing Drawing Symbols Symbol –——––—––—— SD –——––—––—— ——— ——— SSD ——— ——— Description Abbreviation Storm drain, rainwater drain SD, ST Subsoil drain, footing drain SSD –——––—––—— SS –——––—––—— Soil, waste, or sanitary sewer S, W, SAN, SS — — — — — — — — — — — Vent V –——––—––—— AW –——––—––—— Acid waste AW — — — — — AV — — — — — Acid vent AV –——––—––—— D –——––—––—— Indirect drain D –——––—––—— PD –——––—––—— Pump discharge line PD –——––—––—— – –——––—––—— Cold water –——––—––—— – – –——––—––—— Hot water supply (140°F) –——––—––—— – – – –——––—––—— Hot water recirculating (140°F) CW HW a a HWR TEMP. HW, TW –——––—––—— TW –——––—––—— Tempered water (temp. °F) –——––—––—— TWR –——––—––—— Tempered water recirculating (temp. °F)b TEMP. HWR, TWR –——––—––—— DWS –——––—––—— (Chilled) drinking water supply DWS b –——––—––—— DWR –——––—––—— (Chilled) drinking water recirculating DWR –——––—––—— SCW –——––—––—— Soft cold water SCW –——––—––—— CD –——––—––—— Condensate drain CD –——––—––—— DI –——––—––—— Distilled water Dl –——––—––—— DE –——––—––—— Deionized water DE –——––—––—— RO –——––—––—— Reverse osmosis water RO –——––—––—— CWS –——––—––—— Chilled water supply CWS –——––—––—— CWR –——––—––—— Chilled water return CWR –——––—––—— LS –——––—––—— Lawn sprinkler supply LS –——––—––—— F –——––—––—— Fire protection water supply F –——––—––—— G –——––—––—— Gas: low-pressure G –——––—––—— MG –——––—––—— Gas: medium-pressure MG –——––—––—— HG –——––—––—— Gas: high-pressure HG — — — — — GV — — — — — Gas vent GV –——––—––—— FOS –——––—––—— Fuel oil supply FOS –——––—––—— FOR –——––—––—— Fuel oil return FOR — — — — — FOV — — — — — Fuel oil vent FOV –——––—––—— LO –——––—––—— Lubricating oil LO — — — — — LOV — — — — — Lubricating oil vent LOV –——––—––—— WO –——––—––—— Waste oil WO — — — — — WOV — — — — — Waste oil vent WOV O2 –——––—––—— O2 –——––—––—— Oxygen –——––—––—— LO2 –——––—––—— Liquid oxygen –——––—––—— A –——––—––—— Compressed air –——––—––—— X#A –——––—––—— Compressed air: X# –——––—––—— MA –——––—––—— Medical compressed air MA –——––—––—— LA –——––—––—— Laboratory compressed air LA LO2 A c c X#A Chapter 1 — Formulas, Symbols, and Terminology 15 Table 1-1 Standard Plumbing Drawing Symbols (continued) Symbol Description Abbreviation –——––—––—— HPCA –——––—––—— High-pressure compressed air HPCA –——––—––—— HHWS –——––—––—— (Heating) hot water supply HHWS –——––—––—— HHWR –——––—––—— (Heating) hot water return HHWR –——––—––—— VAC –——––—––—— Vacuum VAC –——––—––—— NPCW –——––—––—— Nonpotable cold water NPCW –——––—––—— NPHW –——––—––—— Nonpotable hot water NPHW –——––—––—— NPHWR –——––—––—— Nonpotable hot water return NPHWR –——––—––—— MV –——––—––—— Medical vacuum MV –——––—––—— SV –——––—––—— Surgical vacuum SV –——––—––—— LV –——––—––—— Laboratory vacuum LV –——––—––—— N2 –——–––—–—— Nitrogen N2 –——––—––—— N2O –——––—––—— Nitrous oxide N2O –——––—––—— CO2 –——––—––—— Carbon dioxide CO2 –——––—––—— WVC –——––—––—— Wet vacuum cleaning WVC –——––—––—— DVC –——––—––—— Dry vacuum cleaning DVC –——––—––—— LPS –——––—––—— Low-pressure steam supply LPS — — — — — LPC — — — — — Low-pressure condensate LPC –——––—––—— MPS –——––—––—— Medium-pressure steam supply MPS — — — — — MPC — — — — — Medium-pressure condensate MPC –——––—––—— HPS –——––—––—— High-pressure steam supply HPS — — — — — HPC — — — — — High-pressure condensate HPC — — — — — ATV — — — — — Atmospheric vent (steam or hot vapor) ATV Gate valve GV Globe valve GLV Angle valve AV Ball valve BV Butterfly valve BFV Gas cock, gas stop Balancing valve (specify type) BLV Check valve CV Plug valve PV Solenoid valve Motor-operated valve (specify type) Pressure-reducing valve PRV 16 ASPE Plumbing Engineering Design Handbook — Volume 1 Table 1-1 Standard Plumbing Drawing Symbols (continued) Symbol Description Abbreviation Pressure-relief valve RV Temperature pressure-relief valve TPV Backflow preventer, large assembly (top), small assembly (bottom) RZBP Hose bibb HB Recessed-box hose bibb or wall hydrant WH Valve in yard box (valve type symbol as required for valve use) YB Union (screwed) Union (flanged) Strainer (specify type) Pipe anchor PA Pipe guide Expansion joint EJ Flexible connector FC Tee Concentric reducer Eccentric reducer Aquastat FS Flow switch FS PS Pressure switch PS Water hammer arrester WHA Pressure gauge with gauge cock PG Thermometer (specify type) AV Automatic air vent Valve in riser (type as specified or noted) Riser down (elbow) AAV Chapter 1 — Formulas, Symbols, and Terminology 17 Table 1-1 Standard Plumbing Drawing Symbols (continued) Symbol Description Abbreviation Riser up (elbow) Air chamber AC Rise or drop Branch–top connection Branch–bottom connection Branch-side connection Cap on end of pipe CO CO CO CO Cleanout plug CO Floor cleanout FCO Wall cleanout WCO Yard cleanout or cleanout to grade CO Drain (all types) (specify) D Pitch down or up in direction of arrow Flow in direction of arrow Point of connection POC Outlet (specify type) Steam trap (all types) Floor drain with p-trap FD Thermostatic mixing valve Pipe change in elevation Dielectric union Non-freeze CW wall hydrant Non-freeze CW & HW wall hydrant Non-freeze CW wall hydrant in box Non-freeze CW & HW wall hydrant in box Hot water (140°F) and hot water return (140°F). Use for normal hot water distribution system, usually but not necessarily (140°F). Change temperature designation if required. b Hot water (temp. °F) and hot water return (temp. °F). Use for any domestic hot water system (e.g., tempered or sanitizing) required in addition to the normal system (see note “a” above). Insert system supply temperature where “temp.” is indicated. c Compressed air and compressed air X#. Use pressure designations (X#) when compressed air is to be distributed at more than one pressure. a 18 ASPE Plumbing Engineering Design Handbook — Volume 1 Table 1-2 Standard Fire Protection Piping Symbols Referent (Synonym) Water supply and distribution symbols Symbol Comments Mains, pipe Riser Hydrants Public hydrant, two hose outlets Indicate size,a type of thread, or connection Public hydrant, two hose outlets and pumper connection Indicate size,a type of thread, or connection Wall hydrant, two hose outlets Indicate size,a type of thread, or connection Fire department connections Siamese fire department connection Specify type, size, and angle Freestanding Siamese fire department connection Sidewalk or pit type, specify size Fire pumps Fire pump Freestanding; specify number and sizes of outlets Test header Wall Symbols for control panels Control panel (a) Basic shape FCP Symbols for fire extinguishing systems Symbols for various types of extinguishing systemsb Supplementary symbols Fully sprinklered space AS Partially sprinklered space AS Nonsprinklered space NS Fire alarm control panel Chapter 1 — Formulas, Symbols, and Terminology 19 Table 1-2 Standard Fire Protection Piping Symbols (continued) Referent (Synonym) Symbol Comments Symbols for fire sprinkler heads Upright sprinklerc Pendant sprinklerc, d Upright sprinkler, nippled upc Pendent sprinkler, on drop nipplec, d Sidewall sprinklerc Pendant concealed sprinkler head Symbols for piping, valves, control devices, and hangerse Pipe hanger This symbol is a diagonal stroke imposed on the pipe that it supports Alarm check valve Specify size, direction of flow Dry pipe valve Specify size Deluge valve Specify size and type Preaction valve Specify size and type Flow sensor Tamper switch OS&Y (Outside screw and yoke valve) Carbon dioxide nozzle Symbols for portable fire extinguishers Portable fire extinguisher Portable fire extinguisher Symbols for firefighting equipment Hose station, dry standpipe Hose station, changed standpipe Source: National Fire Protection Association (NFPA), Standard 170 a Symbol element can be utilized in any combination to fit the type of hydrant. b These symbols are intended for use in identifying the type of system installed to protect an area within a building. c Temperature rating of sprinkler and other characteristics can be shown via legends where a limited number of an individual type of sprinkler is called for by the design. d Can notate “DP” on drawing and/or in specifications where dry pendent sprinklers are employed. e See also NFPA Standard 170, Section 5-4, for related symbols. 20 ASPE Plumbing Engineering Design Handbook — Volume 1 Table 1-3 Commonly Used Plumbing Abbreviations The standardized plumbing and piping abbreviations in Table 1-3 have been tabulated by the American Society of Plumbing Engineers for use in the design and preparation of drawings. Users of these symbols are cautioned that some governmental agencies, industry groups, and clients may have a list of preferences that are required for their projects. All symbols should be applied with a consideration for drafting and clarity if drawings are to be reduced. Term Above finished floor Above finished roof Above grade Absolute Acid vent stack through roof American Gas Association American Institute of Steel Construction American National Standards Institute American Petroleum Institute American Society of Mechanical Engineers American Society of Plumbing Engineers American Society of Sanitary Engineering Area drain Alternating current American National Standards Institute American Society of Heating, Refrigerating, and Air-Conditioning Engineers American Society of Testing Materials Ampere American Water Works Association Angle valve Backflow preventer Ball valve Bathtub Brake horsepower British thermal unit Butterfly valve Cast iron Canadian Standards Association Centers for Disease Control Compressed Gas Association Check valve Chemical and Petroleum Industry Cleanout Cleanout deck plate Cold water Compressed air Cubic feet Cubic feet per minute Cubic feet per second Current good manufacturing practice Degree Degrees Celsius Degrees Fahrenheit Degrees Kelvin Double check valve Abbreviation AFF AFR AG abs AVTR AGA AISC ANSI API ASME ASPE ASSE ad ac ANSI ASHRAE ASTM amp AWWA av bfp bv bt bhp Btu bfv CI CSA CDC CGA cv CPI co codp cw ca ft3 cfm cfs cGMP deg. or ° °C °F ºK dcv (CONTINUED) Term Department of Transportation Deutsches Institut fur Normung Diameter Diameter, inside Diameter, outside Difference or delta Direct current Distilled water Dimensional, nominal (size in metric) Double detector check Down Drop manhole Drinking fountain Drainage fixture unit Drainage inlet Drawing Elevation Feet per minute Feet per second Fire extinguisher Fire hose rack Fire hose valve Fixture unit Foot or feet Foot-pound Foot head Gallons Gallons per day Gallons per minute Gallons per hour Gallons per year Good manufacturing practice Hands-off automatic Head Horsepower Hose bibb Heater Hot water Hot water return Heating, ventilating, and air-conditioning Hertz Inches Inches per hour Inch-pounds Inside diameter Instrument air Abbreviation DOT DIN dia. ID OD ∆ dc dw DN DDC dn DMH df dfu DI dwg elev. fpm fps fe fhr fhv fu ft ft-lb ft.hd. gal gpd gpm gph gpy GMP HOA hd hp hb htr hw hwr HVAC Hz in in./hr ip id IA (CONTINUED) Chapter 1 — Formulas, Symbols, and Terminology 21 Table 1-3 Commonly Used Plumbing Abbreviations (continued) Term International Association of Plumbing and Mechanical Officials International Code Council International Plumbing Code Kilowatt hour Kitchen sink Laundry tray Lavatory Leader Linear feet Liquefied petroleum gas Manhole Mechanical equipment room Medical air Medical oxygen Medical vacuum Million gallons per day Miles per hour Minimum Material safety and data sheet National Bureau of Standards National Electrical Manufacturers Association National Fire Protection Association National Plumbing Code National pipe thread Natural gas National Oceanic and Atmospheric Administration Nominal pipe size Normally closed Normally open Normal temperature and pressure Not in contract Not to scale Number Occupational Safety and Health Administration Original equipment manufacturer On center Outside diameter Ounce Oxygen Parts per million Piping and instrumentation diagram Plug valve Post indicator valve Pounds Pounds per cubic foot Pounds per square foot Pounds per square inch Pounds per square inch, absolute Pounds per square inch, gauge Abbreviation IAPMO ICC IPC kWh ks lt lav l lin ft lpg mh mer MA MO MV mgd mph min. msds NBS NEMA NFPA NPC npt ng NOAA nps nc no ntp nic nts no. OSHA oem oc od oz o ppm P & ID pv piv lb lb/ft3 psf psi psia psig (CONTINUED) Term Pressure reducing valve Pressure relief valve psi absolute psi gage Rankine Reduced pressure zone Revolutions per minute Revolutions per second Relative humidity Roof drain Root main square Sanitary fixture units Shower Sillcock Soil Specific gravity Standard dimensional ratio Standard Service sink Steam working pressure Sprinkler Square feet Systeme International d’Unites Temperature and pressure relief valve Tempered water Testable double detector check That is Thousand cubic feet Thousand pounds Top elevation Thermostatic mixing valve Typical Ultraviolet Uniform Plumbing Code Urinal Vacuum Vacuum breaker Vent Vent through roof Volatile organic compound Wall hydrant Waste Water closet Water fixture units Water, oil, and gas Water working pressure Yard hydrant Zone control valve Abbreviation prv pv psia psig °R rpz rpm rps rh rd rms sfu sh sc s sg sdr std ss swp spkr SQ SI tprv tw TDDC i.e. Mcf kip te tmv typ UV UPC ur vac VB v VTR voc wh w wc wfu WOG wwp yh zcv
