Term Definition
Vibration 3 likes
Periodic repetitive movement occurring within specific time intervals
Vibration Detector2 likes
vibration detector
A burglar alarm system component
Vibration Isolator2 likes
vibration isolator
Supple device that supports vibrating machinery and decreases the vibrations to another part of a building or structure
Vibrator2 likes
vibrator
Device that agitates moist concrete to remove air pockets
Vibrator, External 1 like
See External Vibrator
Vibrator, Internal 1 like
See Internal Vibrator
Vicat Apparatus 1 like
Penetration device that establishes the setting properties of hydraulic cements
Video Display Unit (VDU)3 likes
video display unit
Cathode Ray Tube
A computer monitor
Television screen
Vierendeel Truss 3 likes
A rigid frame that serves as a beam, built from parallel bottom and top chords fastened by upright members
Vinyl 2 likes
A plastic produced by polymerization, employed as flooring, gaskets, and wall coverings
Vinyl Asbestos Tile 1 like
Sturdy floor tile made of vinyl strengthened with asbestos fibers
Vinyl Floor Tile2 likes
vinyl floor tile
A sturdy floor tile composed of vinyl
Vinyl Foam Cushioning 1 like
Carpet cushioning composed of foam synthetic materials
Vinyl Gasket2 likes
vinyl gasket
Plastic seal that is in between glass and aluminum
Vinyl Sheet2 likes
vinyl sheet
Vinyl in rolled form
Vinyl Sheet Floor2 likes
vinyl sheet floor
A thin vinyl sheet employed as a floor surface finish
Vinyl Sheetrock 0 likes
Gypsum board with a finished thin vinyl layer
Vinyl Siding 3 likes
External wall cover composed of a thermoplastic compound
Vinyl Trim2 likes
vinyl trim
Extruded moldings composed of vinyl employed for hiding edges, corners, and joints of sheet materials
Vinyl-Covered Gypsum Board 2 likes
See Predecorated Wallboard
Viscoelasticity 2 likes
The ability of asphalt and numerous polymers to simultaneously exhibit viscous and elastic responses
Viscometer 2 likes
An instrument that measures viscosity
Viscosity 0 likes
Intrinsic friction in a fluid; flow resistance; measure of the resistance of a substance to movement under an implied force
Viscosity Cup2 likes
viscosity cup
A device that measures viscosity
Vise2 likes
vise
Bench tool with two jaws that can be closed by turning a screw or lever, that secures an object which is being worked on
Vise Grip3 likes
vise grip
A hand tool similar to pliers that grips objects
Vision Panel 1 like
Glass located in a door opening
Visqueen1 like
visqueen
A 4 mil or 6 mil plastic sheeting; a sturdy polyethylene sheeting employed in building and in the production of waterproof household items
Vitreous 2 likes
Possessing the properties or appearance of glass; degree of vitrification demonstrated by low water absorption; vitreous indicates less than 0.5 percent absorption, with the exception of floor and wall tile and low-voltage electric porcelain that are vitreous until 3.0 percent water absorption
Vitreous China2 likes
vitreous china
The material of a china plumbing fitting with a glass-like finish with respect to color, configuration, fragility, and low porosity; employed for toilets and urinals
Vitreous Enamel 0 likes
An opaque glassy metal coating
Vitreous Tile3 likes
vitreous tile
Tile that has water absorption in excess of 0.5 percent, but not exceeding 3.0 percent
Vitrification 1 like
The progressive decrease in porosity of a ceramic during a firing; process of transforming materials into glass
Vitrified 0 likes
An object that is fused by heat and transformed into glass
Vitrified Clay Pipe 1 like
Hard-baked clay pipes employed particularly for subterranean drainage
VOCs 0 likes
Volatile Organic Compounds
Void 0 likes
An empty area within a material
A hollow space in the core of gypsum board due to air being trapped during manufacturing
Empty areas in a compressed mix surrounded by asphalt coated particles in asphalt paving
Air spaces caused by segregation and inadequate consolidation during the placement of concrete
Void Volume 2 likes
Total sum of empty areas in a compacted mix
Voidable 0 likes
A lawful provision of an agreement that voided by pursuing a specific procedure or process
Volatile Content 0 likes
Materials that evaporate, generally indicated as a percentage
Volatile Flammable Content 1 like
A combustible liquid with a flash point under 100°F (37.°C) or a liquid whose temperature is higher than its flash pint
Volatile Thinner0 likes
volatile thinner
A liquid that evaporates freely; thins or decreases the texture of finishes without changing the volumes of the pigments and nonvolatile substances
Volatiles 2 likes
Fluids that evaporate quickly
Volcanic Ash 3 likes
A delicate lightweight powder employed as a filter medium or filter aid
Volt 0 likes
The SI unit of electromotive force; the electrical potential difference between two points in a circuit that would carry one ampere of current against one ohm resistance
Voltage 0 likes
Electrical potential or electromotive force in an electrical circuit; most homes are wired with 110 and 220 volt lines; 110 volt power is employed for lighting and most circuits; the 220 volt power is generally employed for the kitchen range, dryer, and hot water heater
Voltage or electrical pressure which causes current to flow
Electromotive force
Voltage Regulator3 likes
voltage regulator
Electrical device that ensures uniform voltage supply
Voltmeter1 like
voltmeter
A device that measures the differences of potential between various points of an electrical circuit, in volts
Volume 3 likes
Quantity of space taken up by a gas or three-dimensional solid, measured in cubic units
Volume Ceiling 0 likes
Any ceiling higher than the standard
Volute 1 like
Spiral or scroll-like form, such as in volute pumps
Vomitory 0 likes
An entry or exit passage in a theater or amphitheater
Vortex Tube 1 like
Refrigerating or cooling mechanism for cooling that produces cooling by discharging compressed air through a special tube
Vortex Tube Refrigeration 1 like
Refrigerating or cooling device employing a vortex tube in mining suits
Voussoir 1 like
A wedge-shaped stone or brick piece creating an arch
VTR 0 likes
Vent through roof
Vulcanizing 1 like
Employing sulphur to treat rubber at a high temperature; the treatment hardens and fortifies the rubber
Product of the day

How to Fix Plumbing Noises In Your Home

plumbing fiberglass insulationTo diagnose loud plumbing, you must first determine whether the unwanted sounds occur on the system's inlet side - in other words, when water is turned on - or on the drain side. Noises on the inlet side have various causes: excessive water pressure, worn valve and faucet parts, poorly connected pumps or other appliances, incorrectly placed pipe fasteners, and plumbing runs with excessive tight bends or other restrictions. Noises on the drain side usually originate from poor location or, as with some inlet side noise, a layout with tight bends.

Hissing

Hissing that occurs when a faucet is opened slightly generally signals excessive water pressure. Consult your local water company if you suspect this problem. They will tell you about the water pressure in your area and if necessary, can install a pressure reducing valve on the incoming water supply pipe.

Thudding

Thudding, often accompanied by shuddering pipes when a faucet or appliance valve is turned off, is a condition called water hammer. The noise and vibration are caused by the reverberating wave of pressure in the water, which suddenly has no place to go. Sometimes opening a valve that discharges water quickly into a section of piping with a restriction, elbow, or tee fitting can produce the same condition. Water hammer can usually be fixed by installing fittings called air chambers or shock absorbers in the plumbing to which the problem valves or faucets are connected. These devices permit the shock wave produced by the halted flow of water to dissipate in the air, which unlike water, is compressible. Older plumbing systems may have short vertical sections of capped pipe behind walls on faucet runs for the same purpose; these can eventually fill with water, reducing or destroying their effectiveness. The solution is to drain the water system by turning off the main water supply valve and opening all faucets. Then open the main supply valve and close the faucets one at a time, starting with the faucet closest to the valve and ending with the one furthest away.

Chattering or Screeching

Intense chattering or screeching that occurs when a valve or faucet is turned on, and that usually disappears when the fitting is fully open, signals loose or defective internal parts. The solution is to replace the valve or faucet with a new one. Pumps and appliances such as washing machines and dishwashers can transfer motor noise to pipes if they are improperly connected. Link these items to plumbing with plastic or rubber hoses - never rigid pipe - to separate them.

Other Inlet Side Noises

Creaking, squeaking, scratching, snapping, and tapping are usually caused by the expansion or contraction of pipes, generally copper ones supplying hot water. The sounds occur as the pipes slide against loose fasteners or strike nearby house framing. You can often pinpoint the location of the problem if the pipes are exposed; just follow the sound when the pipes are making noise. Most likely, you will discover a loose pipe hanger or an area where pipes lie so close to floor joists or other framing pieces that they clatter against them. Attaching foam pipe insulation around the pipes at the point of contact should resolve the problem. Be sure straps and hangers are secure and provide sufficient support. Where possible, pipe fasteners should be connected to large structural elements such as foundation walls instead of framing; doing this reduces the transmission of vibrations from plumbing to surfaces that can amplify and transfer them. If attaching fasteners to framing is unavoidable, wrap pipes with insulation or other resilient material where they contact fasteners, and sandwich the ends of new fasteners between rubber washers when installing them. Correcting plumbing runs that suffer from flow-restricting tight or numerous bends is a last resort that should be performed only after consulting a skilled plumbing contractor. Unfortunately, this situation is common in older homes that may not have been built with indoor plumbing or that have been through several remodels, particularly by unprofessional contractors.

Drainpipe Noise

On the drain side of plumbing, the main goals are to eradicate surfaces that can be struck by falling or rushing water and to insulate pipes to contain unavoidable sounds. In new construction, bathtubs, shower stalls, toilets, and wall-mounted sinks and basins should be set on or against resilient under-layments to lower the transmission of sound through them. Water-saving toilets and faucets are less noisy than conventional models; install them instead of older types even if codes in your area still allow older fixtures. Drainpipes that do not run vertically to the basement or that branch into horizontal pipe runs supported at floor joists or other framing present especially troubling noise problems. These pipes are large enough to radiate substantial vibration; they also carry significant amounts of water, which makes the situation worse. In new construction, use cast-iron soil pipes (the large pipes that drain toilets) if you can afford them. Their immense size contains much of the noise made by water traversing them. Also, avoid routing drainpipes in walls shared with bedrooms and rooms where people gather. Walls containing drainpipes should be soundproofed as stated earlier, using double panels of sound-insulating fiberboard and wallboard. Pipes can be wrapped with special fiberglass insulation made for the purpose; these pipes have an impervious vinyl skin that sometimes containing lead. Results are not always acceptable.

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