Use and Care Manual
Table Of Contents
- Preface
- 1 Scope
- 2 Reference publications
- 3 Definitions and abbreviations
- 4 Design requirements
- 4.1 Supply fittings
- 4.2 Servicing
- 4.3 Installation
- 4.4 Threaded connections
- 4.5 Connections other than threaded connections
- 4.6 Accessible designs
- 4.7 Backflow prevention
- 4.8 Cover plates and escutcheons
- 4.9 Toxicity and lead content
- 4.10 Frost-proof faucets and hydrants
- 4.11 Showerheads, body sprays, and hand-held showers
- 4.12 Cross-flow
- 4.13 Fittings incorporating electrical features
- 4.14 Materials
- 4.15 Automatic compensating valve temperature control
- 4.16 Lawn faucets
- 4.17 Flexible water connectors
- 4.18 High-efficiency commercial pre-rinse spray valves
- 4.19 Household hot water dispensers with storage electrical heating systems
- 5 Performance requirements and test procedures
- 5.1 General
- 5.2 Coatings
- 5.3 Pressure and temperature
- 5.4 Flow rate
- 5.5 Operating requirements
- 5.6 Life cycle
- 5.7 Resistance to installation loading
- 5.8 Resistance to use loading
- 5.9 Backflow prevention
- 5.10 Lawn faucets
- 5.11 Alternative materials test
- 5.12 High-efficiency showerheads and hand-held showers
- 5.13 High-efficiency commercial pre-rinse spray valves
- 6 Markings, packaging, and installation instructions
- Annex A (informative) Unit conversion and rounding criteria
- Annex B (normative) Tests by fitting type
ASME A112.18.1-2018/CSA B125.1-18 Plumbing supply fittings
July 2018 © 2018 Canadian Standards Association
51
m) At the level specified in Item k), measure and record the distance between the lowest point of the
outlet of the specimen and the water surface.
The greater of the distances determined in Items h) and m) shall be the critical air gap of the fitting.
The critical air gap test shall be repeated twice to confirm the critical air gap measurement.
The critical level mark on the fittings (see Clause 5.9.2.1) shall be at or below the critical air gap
determined by this test.
Note: 85 kPa (12 psi) is equivalent to 638 mm (25 in) of mercury.
5.9.3 Fittings with submersible outlets
5.9.3.1 General
Fittings where the outlets are submersible shall
a) have a backflow prevention device(s) that complies with the applicable requirements of the
CAN/CSA-B64 Series or ASME A112.18.3; or
b) comply with the applicable requirements specified in Clause 5.9.3.2 or 5.9.3.3.
5.9.3.2 Single-outlet fittings with a submersible outlet
5.9.3.2.1 General
Single-outlet fittings with a submersible outlet shall comply with Clause 5.9.3.2.2 and shall have an
atmospheric vent between two check valves. The atmospheric vent shall be located downstream of the
last control valve, and the critical level of the device shall be at least 25 mm (1 in) above the plane of
the mounting surface of the fitting.
5.9.3.2.2 Test to determine the presence of hidden check valves
5.9.3.2.2.1 General
Fittings incorporating check valves shall be tested in accordance with Clause 5.9.3.2.2.4.
When the test is performed as specified in Clause 5.9.3.2.2.4, water shall be drawn into the sight tube,
demonstrating that all check valves are fouled open and that there are no hidden check valves.
5.9.3.2.2.2 Settings
The procedure for testing the settings shall be as follows:
a) Connect a sight tube in a leak-proof manner to the outlet of the specimen.
b) Seal all atmospheric vents.
c) Foul all check valves open.
d) Install the specimen in accordance with Clause 5.9.3.2.2.3.
e) Conduct the test in accordance with Clause 5.9.3.2.2.4.
f) Once water is drawn into the sight tube, terminate the test.
5.9.3.2.2.3 Mounting
The specimen shall be mounted in its normal operating position in accordance with the manufacturer’s
instructions and using the test set-up shown in Figure 5. The inlet pipe(s) shall be connected collectively
to
a) a
water supply that can deliver water through the specimen at normal flow;