Term Definition
Abrasive17 likes
Substance utilized for wearing, grinding, cleaning, or polishing by rubbing
Abrasive Coatings 23 likes
In closed paper coating, no adhesive is exposed because the paper surface is totally covered with abrasive; in open coating, the backing paper surface is covered with a regulated amount of abrasive that exposes the adhesive
Abrasive Paper20 likes
abrasive paper
Paper with an abrasive surface such as sandpaper, emery paper and garnet paper
Abrasive Surface 14 likes
Rough surface used for safety or warning
Abrasive Surface Tile17 likes
abrasive surface tile
A slip resistant, rough floor tile, the abrasive surfacetile is particularly useful in areas that receive rain and snow.
ABS Pipe27 likes
ABS pipe
Plastic pipe used mainly for drain lines in 10 and 20 feet lengths and various diameters for plumbing stacks and drains
Absorbed Moisture 14 likes
Moisture that has entered a solid material by absorption
Absorbent 13 likes
Can suck up liquid, gas, or heat
Absorber 19 likes
Blackened surface in a solar collector that absorbs solar radiation and transforms it to heat energy
Absorptance 11 likes
Ratio of light absorbed by a material to incident light falling on the material
Absorption Chiller 16 likes
System similar to a vapor compression chiller that doesn’t use a compressor; thermal energy (low pressure steam, hot water, or other hot liquids) produces the cooling effect
Absorption Coefficient 18 likes
Ratio of the sound absorbed to the sound incident on the material or device; the sound absorbed is usually the sound energy incident on the surface minus the sound energy reflected.
Absorption Rate 8 likes
How fast the real estate market absorbs new land or buildings during a specific time
Amount of water absorbed when a brick is partially immersed for one minute
Accelerator16 likes
Materials used to speed up the setting of mortar, grout, plaster or concrete
Access Control 22 likes
Computerized security system used to protect against unauthorized entry into buildings or building areas
Access Door11 likes
access door
Door that provides access to concealed equipment
Access Floor 9 likes
Raised floor platform with removable panels that provides access below
Access Panel16 likes
Removable or swinging panel that provides access to concealed equipment or system components for inspection and maintenance
Accordion Folding Door13 likes
Accordion Folding Door
A folding, hinged, or creased door with rollers along a track
Accordion Partition 13 likes
Folded, creased, or hinged dividing interior wall
Accumulator13 likes
Storage tank that receives liquid refrigerant from the evaporator and stops it from flowing into the suction line before vaporizing
ACM 14 likes
Asbestos-Containing Material
Acoustical Block15 likes
acoustical block
A masonry block with sound-absorbing qualities, the acoustic block is often used in residential, industrial and commercial construction
Acoustical Materials11 likes
acoustical materials
Materials that absorb sound waves
Acoustical Plaster and Plastic 11 likes
Sound absorbing finishing materials used to reduce sound reverberation or noise intensity. Acoustical plaster and plastic is usually applied at 1/2 inch minimum thickness and provides a noise reduction coefficient of at least .45 decibels
ACRI 9 likes
Air-Conditioning & Refrigeration Institute
Acrylic14 likes
Resinous polymers derived from esters, amides or other acrylic aid derivatives
Transparent plastic material in sheet form for window glass and skylights
Addendum (Addenda) 17 likes
Written information that adds to the original bidding documents, that clarifies or changes them. Provided by the owner to the contractor during the bidding process and is part of the final contract documentation
Adhesive Application 13 likes
Means to apply gypsum board using adhesives and additional mechanical fasteners
Adhesive Bond 10 likes
How two materials in contact stick or adhere together by means other than cohesion
Adhesive Failure 9 likes
Adhesive joint failure at the adhesive-adherent interface
Adhesive Spreader12 likes
adhesive spreader
A notched trowel used to apply laminating adhesives
Adhesive Wall Cups 9 likes
Clips and nails with large perforated bases for mastic application to firm surfaces, adhesive wall cups are available in many shapes and sizes
Adhesive, Ceramic10 likes
ceramic adhesive
Used for bonding tile to a surface; Rubber solvents and rubber– and resin-based emulsions are used as adhesives
Adhesive, Pressure-Sensitive16 likes
adhesive, pressure-sensitive
Adhesive that adheres to a surface at room temperature by brief pressure application
Adsorbent 16 likes
Usually solid and able to attract molecules of liquids or gases that adhere to its surface
Adsorption 11 likes
Process of attraction to a surface and attaching foreign molecules on the surface
Aerator14 likes
Round screened screw-on tip of a sink spout that mixes air and water to create a smooth flow
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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 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, 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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