AS 1926.3:2010 – Swimming pool safety Part 3: Water recirculation systems.
5.6.4 Large skimming devices
The tests in Appendix B shall not apply to an alternative skimming system that incorporates a skimming device which has an opening, the length of which is greater than 580 mm and which is incapable of’ being blocked by the body blocking element (see Figure A6).
6.1 Outlets systems
6.1.1 General
Outlet systems shall be installed so that each system has a means of releasing the vacuum pressure on an outlet should it become blocked. This is satisfied by conformance with Clauses 6.1.2 to 6.1.5.
Where there are outlet covers of different design, the system flow rate shall be based upon the lowest rated cover. No cover shall be subjected to a greater flow than its marked rate.
All outlets other than skimmer boxes shall be fitted with covers that comply with Clause 6.2.
Vacuum release devices shall not be used as a substitute for any of the requirements of this Standard.
NOTE: Vacuum release devices that are designed to open to atmosphere and/or shut off the pump in the event of a blockage may be used as a further layer of protection.
6.1.2 Single outlets
A single outlet shall comply with either of the f’ollowing:
(a) A single outlet shall have a cover that has no surface dimension less than 75 mm and at least one surface dimension not less than 800 mm, and the cover shall be tested and marked in accordance with Appendix A, (except Paragraph A5.2).
(b) A single outlet with a cover complying with Clause 6.2 is acceptable provided that it is connected to a skimmer box (see Clauses 5.1 to 5.5) or an alternative skimming system (see Clause 5.6).
6.1.3 Dual outlet systems
Each dual outlet system shall include the following:
(a) Each pump shall be connected to at least two outlets by a common line with at least two branch lines.
(b) The diameter of branch lines shall be equal and shall not be less than the pipe diameter marked on the outlet covers used. (See Clause 6.2(c)(i)).
(c) Branch lines shall not incorporate any devices that may restrict their diameter.
(d) Connected outlets shall not be less than 600 mm apart where possible, centre to centre, and where not possible a minimum of 3 outlets is required.
(e) The system flow rate shall not exceed the outlet cover flow rate of a single outlet cover. (See Clause 6.2(c)(ii)).
6.1 .4 Multiple outlet systems
Each multiple outlet system shall comply with the following:
(a) Outlet systems requiring flow rates in excess of that available using dual outlets shall add additional outlets such that the total system flow rate shall not exceed 50% of the sum of the flow rates of the outlet covers used.
(b) The provisions of Clause 6.1.3(b) and (c) apply.
(c) The dimension in Clause 6.1.3(d) applies to the widest spaced covers except that no cover shall be installed less than 300 mm from an adjoining cover.
6.1 .5 Single outlet s wiin jet systems
A single outlet swim jet system shall be installed only if’ the outlet is combined in the jet
inlet assembly and the assembly is tested and marked in accordance with Appendix A or
Clause 6.2(b). Other swim jet outlets shall comply with the other provisions of this
Clause (6).
6.1.6 Vacuum outlets
A dedicated vacuum cleaning outlet shall be fitted with a spring loaded locking device.
6.1.7 Installation instructions
Manufacturers shall include installation instructions and/or diagrams with packaging of every outlet cover.
6.2 Outlet covers
The following requirements apply:
(a) Outlet covers shall be tested in accordance with Appendix A by an accredited testing laboratory (Clause 3.1).
(b) Outlet covers that are certified as having been tested and marked in accordance with ASME Al 12.19.8 shall be deemed to comply under this Standard and not be subject to the testing and approval procedure in Appendix A.
(c) Outlet covers shall be permanently marked with—
(i) the minimum nominal pipe diameter, in millimetres. to which it can be fitted;
(ii) the maximum allowable flow rate, in litres per minute (L/inin) (see item (d)); and
(iii) the testing authority test number and date of test.
(d) The maximum allowable flow rate (see item (c)(ii)) shall be 80% of the lesser of the flow rates determined in the tests in Paragraphs A5.l and A5.2.
(e) Outlet covers shall be installed on outlet points in a manner that prevents their removal without the use of tools.
NOTE: There are no alternative safety devices for a missing or damaged outlet cover. If any cover is found to be broken or missing, the pool should not be used.