Specification

ASME A112.18.1-2018/CSA B125.1-18 Plumbing supply fittings
July 2018 © 2018 Canadian Standards Association
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5.12.3.4 Additional test conditions
Additional test conditions shall be as follows:
a) the upstream pressure gauge shall be located 200 ± 50 mm (8 ± 2 in) upstream of the specimen
inlet;
b) the pressure gauge size and configuration shall comply with ASME PTC 19.2 or ANSI/ISA-75.02;
c) if a fluid meter is used to measure the flow rate, the installation shall be in accordance with
ASME PTC 19.5;
d) the water temperature shall be 38 ± 6 °C (100 ± 10 °F) and shall be maintained for at least 1 min;
and
e) the flowing pressure shall be 140 ± 7 kPa (20 ± 1 psi) at the inlet.
5.12.3.5 Test procedure
The test procedure shall be as follows:
a) ensure the force balance fixture is dry prior to testing;
b) for showerheads and hand-held showers, mount the specimen so the force target surface and
showerhead faceplate are parallel, and the centre of the force target and the centre of the
showerhead are aligned and 455 ± 6 mm (18 ± 0.25 in) apart, measured before the water flow is
initiated;
c) for rain showers, mount the specimen directly above the force target so that the centre of the rain
shower aligns directly over the centre of the force target at 45° to the target and is parallel to the
floor. The centre of the rain shower to the centre of the forced target should be 455 ± 6 mm
(18 ± 0.25 in) apart (see Figure 7B), measured before the water flow is initiated;
d) once the water flow has been initiated, adjust the specimen using only the standard components
so that the centre of the spray pattern aligns with the centre of the target;
e) maintain water flow for at least 1 min; and
f) verify that the spray force meets the performance requirement specified in Clause 5.12.3.1.
If the centre of the spray pattern cannot hit the centre of the target, the specimen shall be deemed to
have not met the spray force performance requirement.
5.12.4 Spray coverage
5.12.4.1 Performance criteria
The maximum volume of water collected in the 50 and 100 mm (2 and 4 in) rings shall not exceed 75%
of the total volume of water collected and the total combined minimum volume of water collected in
the 50, 100, and 150 mm (2, 4, and 6 in) rings shall be not less than 25% of the total volume of water
collected.
5.12.4.2 Set-up
The specimen shall
a) be thoroughly flushed before measuring the spray coverage;
b) be connected to a smooth-interior pipe or tube with a length equal to at least 20 times the inside
diameter of the inlet(s) of the specimen;
c) be connected to a pipe or tubing of the same nominal size as the specimen connections;
d) have its standard components installed; and
e) be tested with an annular ring test apparatus as illustrated in Figures 10 to 12.