ASME A112.18.1-2005 pdf download

ASME A112.18.1-2005 pdf download.Plumbing supply fittings.
4.4 Threaded connections
4.4.1
Threads shall comply with the following Standards:
(a) pipe threads shall comply with ASME Bi .20.1;
(b) hose threads shall comply with ASME Bi .20.7;
(c) aerators shall have 27 threads per inch, or an ISO Standard M22, M24, or M28 designation;
(d) hand-held shower connection threads shall be 1/2-14 NPSM or ISO 228—G 1/2 B (see ISO 228-1);
(e) the dimensions of supply flare connections shall be as specified in ASME B1 6.26; and
(f) the dimensions of supply compression connections shall be compatible with the requirements of
SAEJ512.
4.4.2
The dimensions for the inlets and shank lengths of 1/2-14 NPSM rigid shanks of deck-mounted lavatory
and sink supply fittings designed to mate with a standard 1/2 NPSM coupling nut and tailpiece or
1/2 nominal size copper water tube shall be as shown in Figures 1 and 2.
Inlets and shanks may be designed to mate with other common connections.
Note: Longer shank lengths are sometimes necessary on account of fitting orientations and countertop thickness or materials.
4.4.3
Alternative end threaded connections for flexible hoses and flexible components shall meet the performance requirements of this Standard.
4.4.4
Shower heads for installation on standard shower arms shall be capable of being connected to a 1/2 NPT male thread.
4.5 Connections other than threaded connections
The lengths and diameters of solder-joint sockets shall be as specified in ASME Bi 6.1 8 or B1 6.22 for connections to copper tubes. However, this requirement shall not apply to factory-assembled parts.
Alternative end connections for flexible hoses and flexible components shall meet the performance requirements of this Standard.
4.6 Accessible design
Operating controls intended for use in accessible designs shall
(a) be automatically controlled; or
(b) meet the following requirements:
(i) it shall be operable with one hand;
(ii) it shall not require tight grasping, pinching, or twisting of the wrist; and
(iii) it shall require an operating force not greater than that specified in Table 2.
4.7 Backflow prevention
Fittings shall be designed to protect the potable water supply from backflow contamination by a means that meets the applicable requirements of Clause 5.9.
Diverting and anti-siphoning devices shall be incorporated into fittings in a way that permits removal for cleaning, repair, or replacement.
4.8 Cover plates and escutcheons
4.8.1
The cover plates of deck-mounted lavatory and sink supply fittings shall have the dimensions indicated in
Figure 1, except as specified in Clause 4.8.2.
4.8.2
Escutcheons for concealed and deck-mounted supply fittings shall be capable of concealing a circular area with a diameter of not less than 44 mm (1 .73 in).
4.9 Toxicity
4.9.1
Fittings covered by Section 9 of NSF/ANSI 61 shall comply with that Standard.
4.9.2
Solders and fluxes containing lead in excess of 0.2% by mass shall not be used where they will be in contact with potable water. Metal alloys in contact with potable water shall not exceed 8% lead content.
4.10 Frost-proof faucets and hydrants
Frost-proof faucets and hydrants shall meet the performance requirements of this Standard. Devices with integral backflow protection shall meet the requirements of CAN/CSA-B64 Series or ASSE 1019.
4.11 Shower heads, body sprays, and hand-held showers
When used as a component part of a shower head, body spray, or hand-held shower assembly, the flow-restricting inserts shall be mechanically retained at the point of manufacture. For the purpose of this requirement, the term “mechanically retained” shall mean that a force of 36 N (8.0 lbf) or more is required to remove the flow-restricting insert. This requirement shall not apply to shower heads that would cause water to leak significantly from areas other than the spray face if the flow-restricting insert were removed.
4.12 Cross-flow
4.12.1
A flow-control device shall not completely shut off the flow of water when
(a) fitted to a faucet or fitting; or
(b) fitted to, or integral with, a shower head or hand-held shower.
4.12.2
Faucets or fittings that have integral flow-control devices downstream of the primary shut-off valves that completely shut off the flow of water shall have check valves installed in the faucet or fitting to prevent cross-flow. These check valves shall meet the requirements specified in Clause 5.3.3.
4.13 Fittings incorporating electrical features
4.13.1 General
Fittings incorporating electrical features shall comply with the applicable CSA or UL Standards. In addition, they shall receive their electrical power from a low-voltage circuit that has a peak open-circuit potential of not more than 42.2 V and is supplied by
(a) a primary battery supply.