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Alpha Plumbing Home Page Water Heaters, Slab Leaks, Trenchless Sewer Replacement, Faucets Repaired and Installed, Toilets Repaired and Installed, Gas Leaks, Food Disposers Water Heaters/Boilers, Water Tempering, Backflow Devices, Service Agreements & PM’s, Trenchless Pipe Replacement, Faucets & Fixtures, Drain Stoppages, Water & Sewer Lines, Gas Lines, Grease & Other Interceptor Installation, Pump Repair & Installation Water Heaters/Boilers, Water Tempering, Backflow Devices, Service Agreements & PM’s, Trenchless Pipe Replacement, Faucets & Fixtures, Drain Stoppages, Water & Sewer Lines, Gas Lines, Grease & Other Interceptor Installation, Pump Repair & Installation Underground Utilities Repair and Installation Testing, Repair and Installation Water Leaks, Sewer Leaks, Gas Leaks, Video Inspections, Line Tracing, Pin Point Leak Locations, Sewer Odors Hydro-Jetting, Cabling, Maintenance Underground pipe replacement without digging a trench Jobsites of interest Contact Alpha Plumbing All about Alpha Plumbing Our site map for your convenience.

 

 

 

Glossary of Plumbing Terms

PLUMBING TERMINOLOGY

 

A B C D E F G H I J K L M N O P Q  R S T U V W X Y Z

 

V

 

TERM

EXPLANATION

   
V-clip A clip shaped like the letter "V" used on a lavatory drain lift linkage assembly to easily adjust connection of the drain to the lift rod.
Vacuum Breaker An anti-siphon device that prevents the backflow of contaminated water into the water supply system.
Valve A device that regulates the flow of fluid.
Valve Dressing Resurfacing a worn valve seat with a special tool. Stops leaks by providing a smooth sealing surface. Applies only to older compression style faucets.
Valve Seat The non-moving part of a valve. Water flow is stopped when the moveable portion of the valve comes in contact with the valve seat.
Valve Seat Wrench Hexagonal end wrench inserted into the hexagonal opening in a valve seat for installing or removal.
Vanity A bathroom storage cabinet under the wash basin.
Velocity Head The amount of energy required to accelerate water to a given velocity; expressed in feet per head.
Vent A pipe that allows air into a drain system to balance the air pressure, preventing water in the traps from being siphoned off.
Vent Header A vent pipe into which several vents connect. The vent pipe leads to the vent stack and out of the building.
Vent Stack Upper portion of the soil stack above the topmost fixture through which gases and odors escape.
Venting Materials Materials used for venting, i.e. PVC, CPVC, ABS, metal.
Venturi A short tube with a tapered constriction in the middle that causes an increase in the velocity of flow of a fluid and a corresponding decrease in fluid pressure and that is used for creating a suction in a vacuum pump.
Viscosity The resistance of fluids to flow, due to internal forces and friction between molecules, which increases as its temperature decreases.
Vitreous Surface Material on some plumbing fixtures derived from or consisting of glass, translucent, and low on porosity.
Vitreous China Ceramic materials fired at high temperature to form a non-porous body, having exposed surfaces coated with ceramic glaze fused to the body. This is used to form bathroom fixtures such as toilets, bidets, and lavs.
Volatile Capable of vaporization at a relatively low temperature.
Volumetric Refers to measurement by volume rather than weight.
Volute Casing Derives is name from a spiral shaped casing surrounding the pump impeller. It converts velocity energy to pressure energy.
Voral Tube Flexible steel hose used for hand-held shower sprays.
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