Plumbing, HVAC & Electrical Glossary
Searchable glossary of 1,273 terms — definitions, common symptoms, repairs, and related code references.
#
A
- Air Gap
- Anti-Siphon Device
- ABS (Acrylonitrile Butadiene Styrene)
- Air Admittance Valve
- Anemometer
- Alcove Bathtub
- Anode Rod
- Aerator
- Auger
- All-Purpose Cleaner
- Anchor
- ABS Fittings
- Arc-Fault Circuit Interrupter (AFCI) Requirement
- Agricultural Irrigation Systems
- Antimicrobial Pipe Coatings
- Apprentice Registration
- Apprentice Logbook
- Authority Having Jurisdiction (AHJ)
- As-Built Drawing
- AI-Powered HVAC Controllers
- Automated Irrigation Controllers
- Augmented Reality (AR) Installation Guides
- Aerator Cleaning Procedure
- Advanced Leak Detection Techniques
- Angle Stop Valve
- Access Panel
- AC Disconnect
- Alkaline Water System
- ADA-Compliant Fixtures
- Accessible Shower System
- Accessible Toilet Features
- Accessible Water Controls
- Accessible Plumbing Codes
- Aging-in-Place Plumbing
- Acoustic Leak Detector
- Alarm Check Valve
- Aquarium Life Support Systems
- Aircraft Hangar Plumbing
- Alternating Current (AC)
- AFCI Breaker
- Arc Fault
- Armored Cable (MC)
- AFCI Receptacle
- Arc Flash
- Ampacity
- Anti-Islanding
- ASHRAE Standard 34
- A2L Refrigerant
- Azeotropic Blend
- ASHRAE Standard 15
- Aerial Devices
- Access Platform (Fire)
- Air Filter
- Air Conditioner (Condensing Unit)
- Air Handler
- Air Purifier
- ACCA Standards
- ASHRAE
- AFUE
- AHRI
- Air Bleed Valve
B
- Back Pressure
- Barrier Concept
- Backflow
- Back Siphoning
- Blue PEX
- Black Iron Pipe
- Butterfly Valve
- Ball Valve
- Basin Wrench
- Bolt Extractor Kit
- Bidet Toilet
- Bidet Toilet Seat
- Bidet Attachment
- Bathtub/Shower Combo
- Bidet
- Bridge Kitchen Faucet
- Bar Faucet
- Beverage Faucet
- Batch Feed Disposal
- Branch Drain
- Bolt
- Band Hanger
- Brass Compression Fitting
- Brass Flare Fitting
- Barbed Fitting
- Backflow Preventer
- Bathroom Drain Clog
- Burst Pipe
- Burst Pipe Emergency Response
- Backflow Prevention Code Requirements
- Bluetooth Low Energy (BLE)
- Building Management Systems (BMS)
- Backflow Prevention Device Testing
- Business-Specific Plumbing Requirements
- Burner Assembly
- Blower Motor
- Blower Housing & Assembly
- Blower Wheel
- Bioswale Drainage
- Backwash System
- Barrier-Free Design
- Borescope Inspection Tool
- Backflow Prevention Assembly
- Brewery & Distillery Systems
- Branch Circuit
- Bonding
- Bonding Jumper
- Bus Bar
- Bus Bar Rating
- Box Fill
- Ballast
- Bypass Diode
- Bubble Point
- Bladder Tank (Foam)
- Booster Panel (NAC Expander)
- Backflow Preventer (Fire Service)
- Butterfly Valve (Fire Protection)
- BTU
- Banging HVAC Noise
- Blank Thermostat Screen
- Blocked HVAC Vents
- Bathroom Exhaust Fan
- Baseboard Heater
- Balance Point
C
- Cold Water Distribution
- Cross-Connection
- Corrosive Water
- Crimp Fittings
- Compression Fittings (PEX-AL-PEX)
- Copper Piping
- CPVC (Chlorinated Polyvinyl Chloride)
- Cast Iron
- CSST (Corrugated Stainless Steel Tubing)
- Check Valve
- Cartridge Puller
- Combustion Analyzer
- Condensate Pump
- Capacitance Meter
- Cast Iron Sink
- Copper Sink
- Console Sink
- Comfort Height Toilet
- Corner Bathtub
- Centerset Faucet
- Cutting Board (Sink Accessory)
- Colander (Sink Accessory)
- Continuous Feed Disposal
- Closet Bend
- Cleaning Equipment & Supplies
- Clevis Hanger
- Cable Tie
- Conduit Hanger
- Copper Pipe
- Coupling
- CPVC Fittings & Flanges
- Copper Elbow
- Copper Tee
- Carbon Steel Fitting
- Cast Iron Hub Fitting
- Cast Iron No-Hub Fitting
- Cleanout
- Cure Time
- Clogged Drain
- Cloudy Water
- Cross-Connection Control
- Combustion Air Requirement
- Chronic Drain Clog Diagnosis
- Carbon Monoxide Alarm Response
- Commercial Water Supply Design
- Commercial Boiler Systems
- Cooling Tower Systems
- Complaint Resolution Process
- Continuing Professional Education (CPE) Hours
- Code-Approved Materials
- Code Violation Consequences
- Change Order
- California Plumbing Requirements
- Connected Heat Pump Systems
- Cloud-Based Monitoring Platforms
- Cordless Power Tools with Smart Features
- Commercial Grade Fixture Selection
- Commercial Code Compliance Strategy
- Closet Bolts
- Cold Water Inlet
- Compressor (Heat Pump Water Heater)
- Contactor
- Condenser Fan Motor
- Capacitor
- Condensate Pan
- Control Transformer
- Condenser Fan Blade
- Connected Water Heater
- Carbon Filtration System
- Chlorine Injection System
- Cooling Tower System
- Compressed Air System
- Commercial Dishwasher System
- Commercial Water Heater Bank
- Commercial Ice Machine System
- Commercial Grease Trap
- Commercial Floor Drain System
- Commercial Water Softener System
- Commercial Water Meter System
- Cleanroom Utility Systems
- Cartridge
- Channels and Angles
- Current (Amperage)
- Conductor
- Circuit Breaker
- Conduit (EMT)
- Cover Plate
- Clamp Meter
- Continuity Test
- Conduit Bender
- Conductor Derating
- Color Temperature (Kelvin)
- Color Rendering Index (CRI)
- Class 2 Circuit
- Contactor (Low-Voltage)
- Charge Controller
- Critical Load Panel
- Combiner Box
- Capillary Tube
- Condensing Unit
- Channel
- CNC Machining
- Control Valves (Butterfly, OS&Y, Check)
- Chassis
- Clean Agents (FM-200, Novec 1230)
- CPVC Fire Sprinkler Pipe
- Clean Agent System
- Carbon Dioxide (CO₂) Suppression
- Catwalk Fabrication
- Centrifugal Fire Pump
- Clash Detection
- Condenser Coil
- Compressor
- Clicking HVAC Sound
- Cool Air from Furnace
- Clogged Condensate Drain
- Coil Cleaner
- CFM
- Chiller
- Combustion
- Condensate
- COP
- Commercial HVAC
- Carbon Monoxide
D
- Drain-Waste-Vent (DWV) System
- Drain and Waste Lines
- DWV Pipe Materials
- Dynamic Pressure
- Diaphragm Valve
- Deburring Tool
- Drop-in Sink
- Dual-Flush Toilet
- Drop-in Bathtub
- Deck-Mount Pot Filler
- Drop-In Bar Sink
- DWV (Drain-Waste-Vent)
- Disinfectant
- Ductile Iron Mechanical Joint Fitting
- Ductile Iron Push-On Fitting
- Drain Field
- Distribution Box
- Dripping Faucet
- Direct Supervision
- Drainage Slope Requirements
- Daily Report
- Digital Pressure Gauges with Bluetooth
- Digital Water Quality Meters
- Digital Torque Wrenches
- Drain Cleaning and Prevention
- Disposal Stopper
- Discharge Tube
- Diverter Valve
- Drain Shoe
- Dip Tube
- Drain Valve
- Defrost Control Board
- Duct Mastic
- Discharge Pipe
- Distillation System
- Digital Manometer
- Dry Pipe Valve
- Deluge Valve
- Deluge Nozzles
- Data Center Cooling Systems
- Direct Current (DC)
- Dual-Function Breaker
- Double-Pole Breaker
- Dimmer Switch
- Digital Multimeter
- Doorbell Transformer
- Depth of Discharge (DoD)
- DC Disconnect
- Drainback System
- Dew Point (Refrigerant)
- Defrost Cycle
- Die/Permanent Casting
- Diesel Engine Driver
- Deficiency Repair & Retrofitting
- Ductwork
- Dirty HVAC Coils
- Dirty HVAC Ducts
- Duct Sealant
- Ductless Mini-Split
- Diffuser
- Dehumidifier
- Damper
- Dual-Fuel System
E
- Effluent
- Electrolysis
- Expansion Fittings
- Epoxy Putty
- Escutcheon Plate
- Elbow Fitting
- Electrical Panel Arcing Emergency
- Emergency Service Communication
- Estimate Presentation Techniques
- Edge Computing for Smart Systems
- Energy Monitoring Systems
- Efficient Pipe Routing and Design
- Emergency Response Planning
- Emergency Response Planning for Business
- Electric Bidet Seat
- Expansion Tank
- Electric Thermostats
- ECO Switch
- Evaporator Coil (Heat Pump Water Heater)
- Electrical Whip
- Energy Recovery Ventilation
- Emergency Call System
- Electronic Pipe Locator
- Electronic Leak Detector
- Electrical Load Calculation
- Equipment Grounding Conductor
- Equipment Ground
- Evacuated Tube Collector
- Electronic Expansion Valve (EEV)
- Evaporator (Refrigeration)
- Evaporator Pressure Regulator (EPR)
- End-of-Line Resistor (EOL)
- Explosion Vent Panels
- Evaporator Coil
- Evaporator Coil Ice Buildup
- Equipment Pad
- EER
- ERV
- Economizer
- EPA 608
- ECM Blower
F
- Flow Rate
- Faucet Key
- Flaring Tool
- Flexible Inspection Camera with Locator
- Fitting Brush
- Farmhouse Sink
- Fireclay Sink
- Freestanding Utility Sink
- Freestanding Bathtub
- Floor-Mount Urinal
- Filtered Water Faucet
- Fixture
- Flapper Valve
- Floor Cleaning Tools
- Foam Hand Soap
- Flat Washer
- Flange
- Floor Drain
- Finish Plumbing
- Frost-Proof Hose Bibb
- Frozen Pipe
- Final Inspection
- Frozen Pipe Immediate Mitigation
- Fire Suppression Water Systems
- Food Service Plumbing
- Foreman
- Florida Plumbing Requirements
- Faucet Cartridge Replacement
- Fixture Lubrication and Adjustment
- Faucet Aerator Cleaning
- Fill Valve
- Flapper
- Flush Handle
- Flue Pipe
- Flow Sensor (Tankless)
- Filter Drier
- Flame Sensor
- Fan/Switching Relay
- Float Switch
- Flow Measurement Equipment
- Fire Suppression System
- Fire Protection Piping
- Fire Protection Fittings
- Fire Sprinkler Heads
- Foam Discharge Nozzles
- Fire Extinguishing Agents
- Fire Alarm Control Panel (FACP)
- Fire Detection Devices
- Fire Notification Appliances
- Fountain & Water Feature Systems
- Food Processing Plumbing
- Ferrule
- Faucet Cartridge Retainer Clip
- Flow Restrictor
- Fabrication Fasteners and Connectors
- Fabrication Saw Blades
- Fabrication Coatings
- Fabrication Quality Control
- Frequency (Hz)
- Four-Way Switch
- Fish Tape
- Fixture Junction Box
- Flat-Plate Collector
- Flammability Class
- Fixed Orifice / Piston
- Flash Gas
- Fire Pumps and Jockey Pumps
- Fire Department Connection (FDC)
- Firestopping (Sealants, Putties, Mortars)
- Fire and Smoke Dampers
- Fusible Link
- Fire Pump Assembly
- Foam Systems
- FM-200 (HFC-227ea)
- Foam Suppression System
- Foam Proportioner
- Foam Deluge System
- Fire Escape Fabrication
- Fire-Rated Enclosure & Cabinetry
- Flame Detector
- Fire Water Storage Tank
- Flickering Lights HVAC
- Faulty HVAC Capacitors
- Frozen Evaporator Coil
- Furnace Igniter Problems
- Furnace
- Flexible Air Duct
- FPR
G
- GPM (Gallons Per Minute)
- GPF (Gallons Per Flush)
- Gray Water
- Galvanized Steel
- Gas Pipe Sizing
- Globe Valve
- Gate Valve
- Granite Composite Sink
- Glass Sink
- Gravity-Fed Toilet
- Glass Shower Door
- Grab Bar
- Gurgling Drains
- Garbage Disposal Not Working
- Garbage Disposal Not Starting
- Garbage Disposal Humming Not Grinding
- Gas Leak Emergency Response
- Greywater Systems
- Green Plumbing Materials
- Greywater System
- Grease Interceptor Systems
- Geothermal Heat Pump Controls
- Garbage Disposal Care & Cleaning
- Grid Drain
- Garbage Disposal Mounting Flange
- Gas Control Valve
- Gas Line Shutoff Valve
- Gas Valve
- Geothermal Heat Pump
- Green Pipe Materials
- Green Building Certification
- Grab Bar Installation
- Ground Penetrating Radar
- Grease Interceptor System
- Greenhouse Irrigation System
- Geothermal Heating Systems
- Gasket
- GFCI Breaker
- Ground Fault
- GFCI Receptacle
- Grounding
- Grounding Electrode
- Ground Rod
- Grounding Electrode Conductor
- Grid-Tie System
- Grounding and Bonding (PV)
- Global Warming Potential (GWP)
- Graphic Annunciator
- Gurgling HVAC Sound
- Grille
H
- Home Plumbing System
- Hot Water Distribution
- Hydro-Jetting Machine
- Heavy-Duty Sewer Machine
- Handheld Bidet Sprayer
- Heat Pump Water Heater
- Hand Sanitizer Dispenser
- Hex Nut
- Heavy-Duty Cable Tie
- Hose Bibb
- HDPE (High-Density Polyethylene) Piping
- Heat Recovery Ventilation (HRV) Systems
- Hand Shower
- Heat Trap Nipples
- Hot Water Outlet
- Heat Exchanger (Tankless)
- Hot Surface Ignitor
- High/Low Pressure Switch
- High-Limit Switch
- Heat Strip / Electric Heating Element
- High-Efficiency Water Heater
- Height-Adjustable Sink
- Hydro-Jetting Equipment
- Hot Conductor
- Hybrid Inverter
- Head Pressure Control
- Heat-Sensitive Element
- Heat Sensors (Fixed/Rate-of-Rise)
- High-Speed Isolation Valves
- High-Rate Discharge (HRD) Containers
- High-Sensitivity Smoke Detection (HSSD)
- Hot-Dip Galvanizing
- Heat Detector
- Horn / Strobe (Notification Appliance)
- Hydraulic Calculations (Fire)
- Hydraulic Demand Point
- Hazen-Williams Formula
- Hazard Analysis & Code Consulting
- Hydrostatic Pressure Test
- HVAC
- Heat Pump
- Hissing HVAC Sound
- HVAC Refrigerant Leak
- HVAC Circuit Breaker Trip
- HVAC Burnt Smell
- HVAC Condensate Leak
- HVAC Musty Smell
- HVAC Short Cycling
- HVAC System Age
- HVAC Blower Motor Failure
- HVAC Multimeter
- HVAC Thermometer
- Humidifier
- HVAC System Sizing
- HSPF
- Heat Exchanger
- HSPF2
- HEPA Filter
- HRV
- Hydronic Heating
I
- Internal PVC Pipe Cutter
- Inspection Camera
- Integrated Sink
- Instant Hot Water Dispenser
- Isolated Low Water Pressure
- Insufficient Hot Water
- Intermittent Hot Water Troubleshooting
- Industrial Process Water Systems
- International Plumbing Code (IPC)
- IAPMO
- ICC (International Code Council)
- Interstate Reciprocity Agreements
- Ignition System (Gas Tankless)
- Inducer Motor
- Integrated Furnace Control Board (IFC)
- Intelligent Backflow Preventer
- IoT Pipe Freeze Protection
- Iron Filter System
- Industrial Steam Boiler
- Industrial Water Treatment System
- Industrial Gas Piping System
- Industrial Chilled Water System
- Industrial Steam Trap
- Industrial Waste Neutralization System
- Industrial Emergency Shower/Eyewash
- Industrial Boiler Feedwater System
- Industrial Chemical Feed System
- Industrial Vacuum System
- Industrial Heat Exchanger
- Irrigation System Design
- Irrigation Zone Valve
- Insulator
- Insulated Screwdriver
- Islanding
- Interconnection Agreement
- Investment Tax Credit (ITC)
- Insertion Loss
- Initiating Device Circuit (IDC)
- Integration Modules (Monitor, Relay, Control)
- Intumescent Coatings
- Inergen (IG-541)
- Initiating Device
- Inspection, Testing & Maintenance (ITM)
- Inspector's Test Connection (ITC)
- Insufficient HVAC Capacity
- Inaccurate Thermostat Reading
- Indoor Air Quality
J
K
L
- Leak Detection Equipment
- Lockout/Tagout Kit
- Lavatory
- Leach Field
- Low Water Pressure
- Leaky Showerhead
- Leaking Water Heater
- Leaking Garbage Disposal
- Lockout/Tagout (LOTO)
- Low Water Pressure Diagnosis
- Low-Flow Fixtures
- Laboratory Plumbing Systems
- Local Permitting Requirements
- Laser Levels and Digital Measuring Tools
- Leak Detection Method
- Lift Rod
- Lower Heating Element
- Leak Detection for Conservation
- Leak Detection Sensor
- Lever Handle Faucets
- Laser Cutters
- Load Center
- Lineman’s Pliers
- Listed/Labeled Equipment
- Luminaire (Light Fixture)
- LED Driver
- Lumens
- Low-Voltage Wiring
- Low-Voltage Transformer
- Lithium Iron Phosphate (LFP)
- Levelized Cost of Energy (LCOE)
- Liquid Receiver
- Line Set
- Liquid Line
- Low-Temp Refrigeration
- Laser/Waterjet Cutting
- Loose Equipment
- Low-Pressure CO₂ System
- Leaky HVAC Ductwork
- Load Calculation
M
- Main Water Line (Service Line)
- Mixing Valve
- Multimeter
- Manual Flush Valve
- Main Sewer Line Clog
- Medical Gas Systems
- Multi-Family Residential Systems
- Master Plumber Progression
- Material Ticket
- Mounting Clips
- Motor Mount
- Multi-Gas Detector
- Marine Plumbing Systems
- Metal Shears
- Metal Rollers
- Metal Polishing and Finishing
- Main Bonding Jumper
- Main Panel (Panelboard)
- Meter Base
- Main Breaker
- Megohmmeter
- Monocrystalline Cell
- Module Efficiency
- Maximum Power Point Tracking (MPPT)
- Microinverter
- Medium-Temp Refrigeration
- Metal Bending/Folding
- Manual Pull Stations
- Mechanical Tee
- Manual Pull Station
- Mass Notification / Voice Evacuation
- Main Drain Test
- Microbiologically Influenced Corrosion (MIC)
- Manifold Gauge Set
- Mini-Split Installation
- MERV
- Manual J
- Manual D
- Manual S
- MPR
- Manometer
N
- Non-Potable Water
- Needle Valve
- Nipple Extractor
- Natural Stone Sink
- No-Hub Coupling
- No Hot Water
- Non-Electric Bidet Seat
- Nipple
- NM Cable (Romex)
- Neutral Conductor
- Neutral-Ground Bond
- Non-Contact Voltage Tester
- National Electrical Code (NEC)
- NEC Article 210
- NEC Article 250
- NFPA 70E
- Net Metering
- Net Billing
- NEXT (Near-End Crosstalk)
- Notification Appliance Circuit (NAC)
- Notification Appliances (Horns, Strobes, Voice Evacuation)
- Novec 1230 (FK-5-1-12)
- Navisworks (Coordination)
- NFPA 25 (Water-Based ITM)
- NFPA 72 Testing (Fire Alarms)
- NATE
O
- Offset Hex Wrench
- One-Piece Toilet
- Outdoor Spigot Leak
- Overflowing Toilet Emergency Control
- On-the-Job Training (OJT)
- OSHA Compliance
- Outdoor Hose Bib Seasonal Care
- Overflow Drain Assembly
- Oil Burner Motor
- Ozone Treatment System
- Outside Stem and Yoke (OS&Y) Valve
- O-ring
- Ohm's Law
- Overcurrent Protection
- Occupancy Sensor
- Off-Grid System
- Ozone Depletion Potential (ODP)
- Oxygen Deprivation Limit (ODL)
- Oil Return
- Optical Fiber (OFN / OFC)
- OS&Y Gate Valve
- Occupancy Hazard Classification
P
- P-Trap Protection System
- Plumbing System Maintenance
- Potable Water
- PEX-A
- PEX-B
- PEX-C
- PEX-AL-PEX
- Push-to-Connect Fittings
- Press Fittings
- PEX (Cross-linked Polyethylene)
- Plug Valve
- Pressure Relief Valve
- Pressure Reducing Valve
- Pipe Fitting Precision
- Plastic Pipe Cutter
- Pipe Threader
- Press Fitting Tool
- PEX Crimper
- PEX Expander
- Pipe Wrench
- Plunger
- Pipe Snake
- Pipe Cutter
- Pipe Repair Clamp
- Pressure Regulator
- Pedestal Sink
- Porcelain Sink
- Pressure-Assisted Toilet
- Pull-Down Kitchen Faucet
- Pull-Out Kitchen Faucet
- Prep Sink
- Plumber's Putty
- Paper Towels
- Pipe Clamp
- Pipe Support Base Plate
- Pipe Support Floor Stand
- PVC Pipe
- PEX Pipe
- PVC Fittings & Flanges
- PEX Crimp Fitting
- Push-to-Connect Fitting
- PEX Expansion Fitting
- Pipe Gasket
- P-Trap
- Pump Chamber
- Pipe Dope
- Pressure Tank
- Pressure Switch
- Pipe Screeching
- Phantom Flush
- Pin-Hole Leak
- Plumbing Code
- Permit
- Pressure Test (Hydrostatic / Air)
- Permit Closeout Documentation
- Phase Change Material (PCM) Systems
- Preventive Maintenance Sales
- PHCC
- Portable Credential
- Plumbing Workplace Hazards
- Professional Development
- Permit Application Process
- Plumbing Inspection Requirements
- Plumbing Inspector
- Pennsylvania Plumbing Requirements
- Predictive Maintenance Software
- Pressure Regulator Adjustment
- Preventive Maintenance Schedule
- Pipe Insulation Maintenance
- Pressure Reducing Valve (PRV) Service
- Preventive Maintenance Contracts
- Pop-Up Drain Assembly
- Pilot Light Assembly
- Pump Impeller
- Pump Gaskets
- Permeable Paving Drainage
- Pipe Monitoring System
- pH Balancing System
- Point-of-Use Filter
- Pipe Freezing Tools
- Pressure Testing Equipment
- Pipe Condition Assessment Tools
- Post Indicator Valve (PIV)
- Process Cooling Water System
- Pool & Spa Circulation System
- Pharmaceutical Manufacturing Systems
- Prison & Detention Plumbing
- Plates and Sheets
- Plasma Cutters
- Press Brakes
- Phase
- Power Factor
- Pigtail Splice
- Photocell
- Power over Ethernet (PoE)
- Photovoltaic (PV) Cell
- Polycrystalline Cell
- Peak Sun Hours
- Power Optimizer
- Payback Period
- Pressure-Relief Device
- Pump Down
- Permanent Link
- Plenum-Rated Cable (CMP)
- PSE (Power Sourcing Equipment)
- Powered Device (PD)
- PoE Budget
- Patch Panel
- Pressure Management (Gauges, Switches, Relief Valves)
- Penetration Devices (Pipe Collars, Wrap Strips)
- Pipe Cutting (Fire Protection)
- Pipe Threading (Fire Protection)
- Pipe Grooving
- Pipe Beveling
- Pre-Fabricated Pipe Spool
- Press-Fit Technology (Fire)
- Pump Skid Fabrication
- Pipe Sizing (Fire Hydraulics)
- Packaged Unit
R
- Red PEX
- Rough-In Valve
- Ratcheting Pipe Cutter
- Refrigerant Scale
- Robe Hook
- Riser Clamp
- Releasable Cable Tie
- Rough-in
- Running Toilet
- Rotten Egg Smell
- Rusty Water
- Rough-In Inspection
- Rainwater Harvesting
- Rainwater Collection System
- RTI (Related Training Instruction)
- RFI (Request for Information)
- Run Capacitor
- Refrigerant Lineset
- Reversing Valve
- Reverse Osmosis System
- Robotic Inspection Crawler
- RV & Mobile Home Plumbing
- Rivets and Pins
- Resistance (Ohm)
- Raceway
- Receptacle (Outlet)
- Receptacle Tester
- Recessed Can Light
- Relay
- Round-Trip Efficiency
- Rapid Shutdown
- Racking and Mounting
- Roof Flashing
- R-410A
- R-404A
- R-448A
- R-407C
- R-134a
- R-22
- R-290 (Propane)
- Refrigeration Machinery Room
- Refrigerant Detector
- Refrigerant Concentration Limit (RCL)
- Refrigerant Emergency Ventilation
- Refrigerant Charge
- Robotic / Automated Welding
- Revit (Fire Protection Modeling)
- Refrigerant
- Refrigerant Recovery Machine
- Register
- Residential Boiler
- Radiator
- Rooftop Unit
- R-32
- R-454B
S
- Supply and Drainage Integration
- Static Pressure
- Schedule 40 PVC
- Schedule 80 PVC
- Stop Valve
- Shut-Off Wrench
- Strainer Locknut Wrench
- Shower Valve Socket Wrench Set
- Swaging Tool
- Snake Machine
- Stainless Steel Sink
- Standalone Bidet
- Soaking Tub
- Steam Shower
- Single-Handle Faucet
- Shower Trim Kit
- Shower Enclosure
- Shower Base/Pan
- Sensor Flush Valve
- Single-Handle Kitchen Faucet
- Sink Grid
- Shutoff Valve
- Soap & Lotion Dispenser
- Split Ring Hanger
- Stud Guard
- Shield Plate
- Swivel Hanger
- Strut Channel
- Strut Fitting
- Sanitary Stainless Fitting
- Stainless Threaded Fitting
- Stainless Weld Fitting
- Stud Bolt
- S-Trap
- Soil Stack
- Sewer Gas
- Sump Pump
- Septic Tank
- Septic Pump
- Soldering
- Solvent Welding
- Service Line
- Smelly Hot Water
- Sewer Backup
- Sump Pump Failure
- Sewer Gas Smell
- Sewer Backup Emergency Protocol
- Smart Water Leak Detectors
- Smart Water Shutoff Systems
- Smart Water Monitors
- Smart Thermostats for Water Heaters
- Smart Sump Pump Systems
- Smart Faucets and Fixtures
- Solar Water Heating
- Swimming Pool Mechanical Systems
- Stainless Steel Piping Systems
- Smart Pipe Monitoring Systems
- Self-Healing Pipe Materials
- Service Call Documentation
- Supervisory Authority
- State Licensing Variations
- Submittal
- State Apprenticeship Duration Variations
- State CPE Requirement Variations
- Smart Thermostats
- Smart Vents and Dampers
- Smart Air Quality Monitors
- Smart Ductwork Sensors
- Smart Pipe Inspection Cameras
- Smart Multimeters and Test Equipment
- Smart Home Hubs
- Smart Pool and Spa Systems
- Smart Water Heater Controllers
- Smart Solar Water Heating
- Smart Radiant Floor Heating
- Smart Safety Equipment
- Seasonal Plumbing Maintenance
- System Pressure Monitoring
- Sump Pump Maintenance Checklist
- Spud Gasket
- Standard Toilet Seat
- Slow-Close Toilet Seat
- Sink Mounting Brackets
- Strainer Basket
- Side Sprayer
- Sprayer Hose
- Soap Dispenser Pump
- Splash Guard
- Shower Arm
- Shower Flange
- Shower Drain Cover
- Shower Valve Cartridge
- Showerhead
- Sediment Trap
- Start Capacitor
- Schrader Valve Core
- Solenoid Valve & Coil
- Sequencer
- Sump Pump Check Valve
- Sump Pit Liner
- Sustainable Water Treatment
- Smart Water Meter
- Smart Shut-off Valve
- Smart Irrigation Controller
- Smart Faucet with Usage Tracking
- Smart Toilet System
- Smart Sump Pump
- Smart Water Softener
- Smart Grease Trap
- Sediment Filter System
- Scale Prevention System
- Smart Diagnostic Sensors
- Sewage Lift Station
- Solar Thermal Systems
- Seats and Springs
- Structural Beams and Columns
- Short Circuit
- Single-Pole Switch
- Switch Loop
- Smart Switch
- Service Entrance
- Subpanel
- Service Drop
- Service Lateral
- Service Mast
- Smart Dimmer
- Structured Wiring (Cat6)
- Smart Panel
- Solar Module
- Solar Array
- Solar Irradiance
- Standard Test Conditions (STC)
- String Inverter
- Solar Battery
- Solar Renewable Energy Certificate (SREC)
- Solar Access and Easement
- Safety Group Classification
- Superheat
- Subcooling
- Sight Glass / Moisture Indicator
- Suction Line
- Structured Cabling
- Single-Mode vs Multimode Fiber
- Structural Welding
- Sprinkler Heads (Pendent, Upright, Sidewall)
- Smoke Detectors (Photoelectric/Ionization)
- Sway Brace
- Seismic Bracing & Restraints
- Smoke Detector
- Storz Connection
- Squealing HVAC Noise
- SEER Rating
- Split System
T
- Type K Copper
- Type L Copper
- Type M Copper
- Type DWV Copper
- Thermostatic Valve
- Torque Wrench
- Tubing Cutter
- Tube Bender
- Thread Cleaner
- Torch
- Toilet Shims
- Tube Flaring Tool
- Tin Snips
- Thermoplastic Utility Sink
- Two-Piece Toilet
- Touchless Faucet
- Tub Filler
- Towel Bar
- Towel Ring
- Toilet Paper Holder
- Tank Water Heater
- Tankless Water Heater
- Teflon Tape
- Toilet Tissue
- Trash & Recycling Bins
- Tilt Truck
- Tee Fitting
- Transition Coupling
- Trap Integrity
- Trap Primer
- Threading
- Toilet Not Flushing
- Toilet Leaking at Base
- Tankless Water Heaters
- Technical Explanation Simplification
- Texas State Board of Plumbing Examiners (TSBPE)
- Texas Plumbing Code
- Texas Apprentice Requirements
- Texas Journeyman Requirements
- Thermal Imaging Cameras
- Toilet Wax Ring Replacement
- Toilet Preventive Maintenance
- Thermal Expansion Tank Inspection
- Tank-to-Bowl Gasket
- Toilet Tank
- Toilet Bowl
- Tub Spout
- Tub Gaskets and Seals
- Temperature and Pressure Relief Valve
- Thermocouple
- T&P Relief Valve Discharge Pipe
- Temperature Sensor (Tankless)
- Thermostatic Expansion Valve (TXV)
- Thermostat Wire & Cable
- TDS Meter
- Transfer Seat System
- Thermal Imaging Camera
- Trenchless Repair Tools
- Tandem Breaker
- THHN/THWN Wire
- Three-Way Switch
- Tamper-Resistant Receptacle
- Transfer Switch
- Thin-Film PV
- Temperature Coefficient
- Tilt and Azimuth
- Thermosiphon System
- Toxicity Class
- Temperature Glide
- Total Superheat
- Target Superheat
- Twisted Pair
- Tamper Switch (Valve Supervisory)
- Thermostat
- Ton (Cooling)
U
- Undermount Sink
- Undermount Bathroom Sink
- Undermount Bar Sink
- Union
- Utility Cart
- Uniform Plumbing Code (UPC)
- Ultrasonic Leak Detection Equipment
- Upper Heating Element
- Utility Pump Hose
- UV Sterilization System
- USB Receptacle
- Ufer Ground
- Uneven HVAC Temperatures
- Unresponsive Thermostat
- UV Light (Air Treatment)
V
- Vent System Function
- Valve Seat
- Valve Stem
- Vanity Sink
- Vessel Sink
- Vitreous China Sink
- Vanity Top
- Vent
- Vent Stack
- Venting
- Venting Code Requirements
- Voice Control Integration
- Vent Hood
- V-Belt
- Visual Contrast Elements
- Video Inspection Camera
- Voltage
- Voltage Drop
- Valve Cabinet
- VESDA / Aspirating Smoke Detection (ASD)
- Vacuum Pump
- VAV
- Variable-Speed Compressor
- VRF
- Ventilation
W
- Water Supply System Components
- Water Supply Pipe Materials
- Water Control Systems
- Water Hammer Arrester
- Wastewater
- White/Grey PEX
- Wire Brush
- Water Hammer Arrestor
- Wall-Mounted Sink
- Wall-Mount Utility Sink
- WaterSense Toilet
- Walk-in Tub
- Walk-in Shower
- Water Closet
- Widespread Faucet
- Wall-Mount Faucet
- Wall-Mount Urinal
- Wall-Mount Pot Filler
- Water Heater Service Life
- Wye Fitting
- Washer
- Water Meter
- Water Main
- Water Pressure
- Well Pump
- Well Casing
- Well Cap
- Well Screen
- Water Hammer
- Weak Flush
- Widespread Low Water Pressure
- Water Heater Noises
- Water Heater Sediment Buildup
- Water Hammer Investigation
- Water Heater Emergency Shutdown
- Water Conservation Strategies
- Warranty and Guarantee Communication
- Water Heater Code Requirements
- WiFi 6 and Mesh Networks
- Water Heater Element Replacement
- Water Pressure Optimization
- Water Quality Management
- Water Heater Maintenance Protocol
- Water Softener Maintenance Schedule
- Whole-Home Leak Inspection Routine
- Washing Machine Hose & Valve Inspection
- Water Management and Efficiency
- Wax Ring
- Water Supply Line
- Wall-Hung Toilet
- Whirlpool Jets
- Water Heater Pan
- Water Reclamation System
- Water Conservation Devices
- Water-Efficient Landscaping
- Water Quality Monitor
- Wireless Pressure Sensor
- Water Softener System
- Water Testing Kit
- Whole House Filter
- Water Quality Certification
- Walk-in Tub System
- Water Quality Analyzer
- Welding Consumables
- Watt (Power)
- Wire Gauge (AWG)
- Wire Nut
- Wire Stripper
- Working Clearance
- Wattage Rating
- Walk-In Cooler
- Walk-In Freezer
- Waterflow Switches and Motor Gongs
- Weldolet
- Water Mist System
- Wet Chemical Agent
- Wet-Barrel / Yard Hydrant
- Weld Inspection (Fire Piping)
- Waterflow Switch / Alarm Check Valve
- Warm Air Blowing from AC
- Weak HVAC Airflow