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InspectAPedia ® Home PLUMBING SYSTEM INSPECT DIAGNOSE REPAIR AGE of PLUMBING MATERIALS & FIXTURES AIR DISCHARGE at FAUCETS, FIXTURES ANTI SCALD VALVES ANODES & DIP TUBES on WATER HEATERS BACKUP PREVENTION, SEPTIC BACKUP PREVENTION, SEWER LINE BACKWATER VALVES, SEWER LINE BATH & KITCHEN DESIGN GUIDE BLEVE EXPLOSIONS CHEMICAL CONTAMINANTS in WATER CHLORINE IN DRINKING WATER CISTERNS DEBRIS in WATER SUPPLY, Water Heater DEPTH of SEPTIC TANK DRAIN & SEWER PIPING FAUCETS & CONTROLS, KITCHEN & BATH FAUCETS, OUTDOOR HOSE BIBBS FILTERS, WATER FLOOD DAMAGE ASSESSMENT, SAFETY & CLEANUP FLOOR DRAIN / TRAP ODORS FLUSHOMETER VALVES for TOILETS URINALS FREEZE-PROOF PIPES GAS PIPING, VALVES, CONTROLS GALVANIC SCALE & METAL CORROSION HARD WATER - SOFTENERS HEAT TAPES, Heat, Insulation prevent Freeze-Up LEAD POISONING HAZARDS GUIDE LEAD IN DRINKING WATER, HOW to REDUCE METHANE GAS SOURCES MIXING / ANTI-SCALD VALVES MUNICIPAL WATER PRESSURE IMPROVEMENTS NOISE / SOUND DIAGNOSIS & CURE ODORS GASES SMELLS, DIAGNOSIS & CURE ODORS IN WATER ODORS, SEPTIC or SEWER ODORS SEWER GAS in COLD WEATHER ODORS, SULPHUR SMELL SOURCES ODORS, URINE REMOVAL PIPING IN BUILDINGS, Clogs Leaks Types PLUMBING FIXTURES, KITCHEN, BATH PLUMBING NOISE CONTROL PLUMBING VENT DEFINITIONS & CODES PLUMBING VENT DEFECTS & NOISES PUMPS, WATER REPAIR RELIEF VALVE LEAKS RELIEF VALVES - TP Valves on Boilers RELIEF VALVES - STEAM TP VALVES RELIEF VALVES - Water Heaters RELIEF VALVES - Water Tanks REPAIR BURST LEAKY PIPES SEPTIC METHANE GAS SEPTIC ODORS SHUTOFF VALVE LOCATION, USE SULPHUR & SEWER GAS SMELL SOURCES SWEATING (CONDENSATION) on PIPES, TANKS TOILETS, INSPECT, INSTALL, REPAIR WATER HEATERS WATER, WELLS, WATER TANKS: TESTING GUIDE WATER PRESSURE LOSS DIAGNOSIS & REPAIR WATER PUMPS & TANKS WATER SOFTENERS & CONDITIONERS WATER SOURCE ALTERNATIVES WATER SUPPLY & DRAIN PIPING WATER SHUTOFF VALVE LOCATION, USE WATER SHUTOFF VALVE, WELL PUMP WATER TESTS, CONTAMINANTS, TREATMENT WELLS CISTERNS & SPRINGS WINTERIZE A BUILDING    More Information |
This article lists significant Plumbing DWV (Drain Waste Vent Piping) defects, definitions, and home inspection education topics. This article series, beginning at BUILDING DEFECTS LISTS, provides lists of common building defects and basic defect knowledge that also outline recommended curriculum content for home inspector education. The building defects and inspection points listed in these articles also guide homeowners and home buyers to building areas that merit careful attention and often point areas of safety concern or important maintenance and repair tasks. Green links show where you are. © Copyright 2013 InspectAPedia.com, All Rights Reserved. Author Daniel Friedman. Home Inspection Education Curriculum - DWV Drain Waste Vent PipingReaders should see PLUMBING SYSTEM INSPECT DIAGNOSE REPAIR for our complete list of articles on this topic. Also see HOME & BUILDING INSPECTORS & INSPECTION METHODS. Use the Search Box at the top or bottom of these pages to find in-depth information about building, energy savings, and indoor environment inspection, diagnosis and repair at this website. Watch out: these inspection lists do not list all possible defects for the systems discussed, and not all home or building inspectors will examine all of the items listed here. CONTACT us to suggest corrections or additions to articles at this website. Also see These curriculae and building defect lists are based on smilar curriculum documents first prepared by Joe Scaduto, an ASHI member who prepared course material for Northeastern University's Building Inspection Certificate program in 1988, subsequently by DF, InspectApedia's editor, for New York University ca 1988 and later, with others, recommended to ASHI, the American Society of Home Inspectors. ASHI did not adopt this material though currently that association as well as others offer extensive HOME INSPECTOR EDUCATION material. The curriculum and lists of defects are informed by additional analysis of the process of home inspection that was developed beginning Calgary, AB for Canadian and U.S. home inspector education and certification examinations in 1997. Other early contributors to home inspection education in the U.S. and Canada include Dr. Jess Aronstein, Alan Carson, Mike Casey, Mark Cramer, John Cox, Dwight Barnett, Douglas Hansen, Rick Heyl, Larry Hoytt, Bill Merrill, Kevin O'Malley, Dennis Robitalille, Keith Peddie, Pat Porzio, Roger Robinson. 6.3 Drain, Waste and Vent Piping6.3.1 Knowledge Base 1. Describe the function of drain, waste and vent plumbing systems for homes. 2. List the materials and components of the drain, waste and vent piping system, including piping, traps, floor drains, vent pipes, sewage ejector pumps, sump pumps, laundry tub pumps. 3. Describe the features of adequate installation and repair technique on drain, waste and vent plumbing systems. 4. Define the following terms with respect to drain waste and vent plumbing in houses: drain pipe, waste pipe, vent pipe, combination sewer, public drain, building sewer, building drain, private sewer, septic tank, soil pipe, trap weir, trap dip, trap seal, tail piece, trap arm, self-scouring trap, trap primer, soil stack, vent stack, branch vent, wet vent, siphoning, cross connection, air gap, running trap, self trapping, double trapping, trap primer, P trap, S trap, drum trap, bell trap, crown-vented trap, siphon, island venting, back vent, loop vent, ejector pump – (check valve, gate valve, union), pedestal sump pump, submersible sump pump, high-level alarm. 5. Identify the codes or standards which apply to drain waste and vent plumbing in your area. 6.3.2 Inspection skills: 1. Describe the inspection procedure for drain, waste and vent plumbing systems, including all the components discussed above. 2. Identify the common defects listed on the next page. 3. Describe the implications of each defect. 4. Identify safety issues for the inspector and occupant of the home (electric shock, contaminated water causing illness). 5. Communicate findings to client verbally and in writing, recommending corrective actions when needed. WASTE PLUMBING TYPICAL DEFECTS DRAIN PIPING MATERIALS FLOOR DRAINS • Clean-outs missing or inaccessible • Backup • Clogged • Downspout connection upstream of trap • Clothes washer drain connections • Grate missing, rusted or obstructed • Combustible piping • Missing • Cross connections • No trap • Defective ABS piping • No primer or poor primer arrangement • Dishwasher drain connections • Poor location • Exposed to mechanical damage • Freezing VENTING SYSTEMS • Galvanized steel pipe buried in soil • Improper condensate drain and water softener discharge drain • Automatic air vents connections • Leak • Ineffective • Noisy • Island venting problems • Nonstandard materials and patches • Missing • Pipe size reduced downstream • Poor vent pipe arrangements • Poor slope • Too small or too long • Poor support • Vent termination problems • Poor manifolding of drain piping • Rust, corrosion LAUNDRY TUB PUMPS • Split, damaged, crimped pipe • Undersized • Clogged • Welded steel piping • Discharge pipe problems • Electrical problems TRAPS • Excess noise or vibration • Inoperative • Clogged • Missing • Double trapping • Short cycling or running continuously • Freezing • Leak SUMP PUMPS • Missing • No clean out provision • Debris in the sump, clogged sump • Nonstandard shape or material • Discharge pipe problems • Split, rusted or damaged • Electrical problems • Tailpiece (fixture outlet pipe) too long • Excess noise or vibration • Trap primer – possible cross • Inoperative, poorly secured or rust connection • Trap primer missing • Lid missing, rotted or not secure • Trap arm too long or too short • Missing • Traps too small or too big • Short cycling or running continuously • Wrong type • Sump damaged SEWAGE EJECTOR PUMPS • Alarm sounding • Discharge pipe problems • Electrical problems • Inoperative • Missing, rusting or inoperative union, check valve or gate • No vent • Odor • Short cycling or running continuously top not secured sanitarily or missingReaders should see PLUMBING SYSTEM INSPECT DIAGNOSE REPAIR for our complete list of articles on this topic. Also see HOME & BUILDING INSPECTORS & INSPECTION METHODS. Use the Search Box at the top or bottom of these pages to find in-depth information about building, energy savings, and indoor environment inspection, diagnosis and repair at this website. Watch out: these inspection lists do not list all possible defects for the systems discussed, and not all home or building inspectors will examine all of the items listed here. CONTACT us to suggest corrections or additions to articles at this website. Also see Frequently Asked Questions (FAQs) about inspection checklists for drain-waste-vent piping systems... Ask a Question or Search InspectApediaUse the search box below to ask a question or to search the InspectApedia.com website. Ask a Question or Enter Search Terms in the InspectApedia search box just below. Technical Reviewers & ReferencesRelated Topics, found near the top of this page suggest articles closely related to this one.
Books & Articles on Building & Environmental Inspection, Testing, Diagnosis, & Repair
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Carson, Dunlop & Associates Ltd.,
The Home Reference Book - the Encyclopedia of Homes