ASME A112.18.1-2005 pdf free download.Plumbing supply fittings.
3 Definitions and abbreviations
The following definitions apply in this Standard:
Accessible — readily serviceable or readily replaceable.
Accessible desIgn — a design approach for making devices accessible to persons with physical, sensory, or cognitive disabilities.
Note: Accessible designs were lbrmerfr called barrier-tree designs
Accessory — a component that can, at the discretion of the user, be readily added, removed, or replaced, and that when removed, will not prevent the fitting from fulfilling its primary function.
Note: Examples include aeraton, hand-held shower assemblies, shower heads and irs-fine flow controls,
Air gap — the unobstructed vertical distance, through air, between the lowest point of a water supply outlet and the mounting deck of the fitting.
Automatic compensating valve — a device that is supplied with hot and cold water and provides a means of automatically maintaining the water temperature selected for an outlet.
Note: Aatonsatk compensating valves are used to reduce the nsA of scalding and thermal shoct
Combination pressure-balancing and thermostatic compensating valve — a water-mixing valve that senses inlet supply hot and cold water pressures before mLxing, senses the water temperature at the outlet, and compensates for pressure and thermal variations to maintain the water temperature at the outlet.
Pressure-balancIng compensating valve — a water-mixing valve that senses inlet supply hot and cold water pressures and compensates for variations in the inlet supply pressures to maintain the water temperature at the outlet.
Thermostatic compensating valve —a water-mixing valve that senses the water temperature at the outlet and compensates br thermal variations to maintain the water temperature at the outlet.
Backflow — a flowing back or reversal of the normal direction of flow.
Note: Sack s4phonoge and bock pressure ore 4ves of boc Allow.
Backflow prevention devIce — any mechanical device, whether used singly or in combination with other controls, designed to automatically prevent an unintentional reversal of water flow in a potable water system due to back pressure or back siphonage.
Back pressure — pressure higher at the downstream or outlet end of a water distribution system than at a point upstream.
Back siphonage — backilow caused by below-atmospheric pressure in the supply system.
mister — a dome-shaped defect resulting from loss of adhesion between layers or between one or more layers and the substrate.
Body spray — a shower device for spraying water onto a bather other than from the overhead position. Note: An example iso device mounted on a wail below the bother’s head that sprays water in an approximately horizontal direct ion and can be fixed or allowed to swlvel an a ball joint.
Lawn faucet — a faucet designed to be installed horizontally on the outside wall of a building with male or female IPS threads or copper solder connections on the inlet and hose threads on the outlet. The outlet is usually angled 45 from the horizontal. The faucet includes a flange that mounts flush with the wall.
Note: These faucets can be r,on.treeze faucets.
Metering faucet — a faucet that after actuation dispenses water of a predetermined volume or for a pedetermined period of time.
Note: The volume or cycle duroPon con be fixed or adjustable.
Sediment faucet — a horizontal faucet with male at female IPS threads on the inlet side and male hose threads at the outlet spout. The outlet can be angled approximately perpendicularly to the inlet or angled outward.
Note: These volves were formerly called bader drains because they were originally designed to drain woter from boders and release any accumulated sediment, Today they ore also used in laundry iuoms as hook.ups for v.vshing machines.
Self-closing faucet — a faucet that is designed to close itself as soon as the activating mechanism is released.
Fitting — a device designed to control and guide the flow of water.
Combination fitting — a fitting with more than one supply inlet delivering water through a single spout.
Concealed fitting — a fitting with its body mounted beneath or behind a fixture, wall, or surface.
Deck-mounted fitting — a fitting that is mounted on top of a horizontal surface.
Exposed fitting — a fitting whose body is mounted above or in front of a fixture’s deck or shelf.
Supply fitting — a fitting designed to control and guide the flow of potable water in a supply system.
Terminal fitting — a fitting for use with an open or atmospheric discharge.