ASME A112.18.1-2012 pdf – Plumbing supply fittings
ASME A112.18.1-2012 pdf – Plumbing supply fittings.
Fittings with non-standard threads for aerators or other end point devices may be used.
hand-held shower connection threads shall be 1/2-14 NPSM or ISO 228-G 1/2 B (see ISO 228-1).
The dimensions of supply flare connections shall be as specified in ASME B16.26.
The dimensions of supply compression connections shall be compatible with SAE 51 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 tengths are sometimes necessary on account of fitting onentaons and countertop thickness or moteriots.
Alternative end-threaded connections for flexible hoses and flexible components shall comply with the performance requirements of this Standard.
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 B1 618 or ASME Bi 6.22 for connections to copper tubes. This requirement shall not apply to factory-assembled parts.
Connections achieved by push-fit fittings, intended for use under continuous pressure, shall comply with ASSE 1061,
Alternative end connections for flexible hoses and flexible components shall comply with the performance requirements of this Standard.
Fittings with propnetary connections for aerators or other end point devices may be used.
4.6 Accessible designs
Operating controls intended for use in accessible designs shall
(a) be automatically controlled; or
(b) meet the following requirements:
(i) be operable with one hand;
(ii) not require tight grasping, pinching, or twisting of the wrist, and
(iii) require an operating force not greater than that specified in Clause 5.5.2.
4.7 Ilackflow prevention
Fittings shall be designed to protect the potable water supply from contamination due to backf low by a means that meets the applicable requirements of Clause 5.9.
Diverting and anti-siphoning devices incorporated into a lilting shall be removable for cleaning, repair, and replacement.
4.8 Cover plates and escutcheons
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.
Note: Refer to the opproprJate fixture standards for the minimum mounting surface dimensions
Concealed and deck-mounted supp’y fitting bodies or their escutcheons shall be capable of concealing a circular area with a diameter of not less than 44 mm (1.73 in).
4.9 Toxicity and lead content
Fittings covered by this Standard shall comply with the applicable requirements of NSF/ANSI 61.
Solders and fluxes In contact with potable water shall not exceed, by mass, 0.2% lead content. Metal alloys in contact with potable water shall not exceed 8% lead content.
Fittings intended to convey or dispense water for human consumption through drinking or cooking shall not contain a weighted average lead content in excess of 0.25% when evaluated in accordance with the test method specified in NSF/ANSI 372.
4.10 Frost-proof faucets and hydrants
Frost-proof faucets and hydrants shall comply with the performance requirements of this Standard.
Devices with integral backilow protection shall comply with CANICSA-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 assemblç 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.
4.11.2 High-effIciency shower heads and hand-held showers
Note: Water conserving shower heads do not necessary have to con1py sth the high-efficiency requirements specified in Clause 5.12 if they we not designated as high-efficiency shower heads.