AS 1926.3:2010 pdf – Swimming pool safety Part 3: Water recirculation systems

AS 1926.3:2010 pdf – Swimming pool safety Part 3: Water recirculation systems.
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 OUTLFZTS
6.1 Outlets systems
Outlet systems shall he 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 difkrent design, the system flow rate shall be based upon the lowest rated cover. No cover shall be subjected to a greater flow than its niarked 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 olY the pump in the event of a blockage may be used as a further layer oiproteciion.
A single outlet shall comply with either of the following:
(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 au/let X3’.Sk’fl1
Each dual outlet system shall include the following:
(a) Each pump shall be connected to at least two outlets by a comnion line with at least two branch lines.
(b) The diameter of branch lines shall he equal and shall not he 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)).
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 thesum of the flow rates of the outlet covers used.
(b)The provisions of Clause 6.1.3(b) and (c) apply.