Flush valve (SS636:2018 Clause 8.7.2)
To prevent excessive water pressure force the water back into the water source at from the flush valves, all flush valve for water closets must incorporate with a check valves / anit vacuum breakers that comply with requirements and standards stipulated by the Authority,
Handheld bidet spray (SS636:2018 Clause 8.3.3)
To prevent water being drain back into the water source when the hand-held bidet spray (connected to a flexible hose) submerge into the water closet reservoir, thus all hand-held bidet spray (connected to a flexible hose) located next to a water closet shall be installed with a check valve and vacuum breaker.
Draw-off taps near a pond or drain (SS636:2018 Clause 8.3.4)
To prevent water being drain back into the water source when the hand-held spray (connected to a hose) submerge into the pond from a draw-off tap, all draw-off tap installed near to a pond or drain shall be installed with a check valve and vacuum breaker.
Please Note
It is common to see water coming out from the vacuum breaker and this shows that the vacuum breaker is performing its function by preventing water from entering into the main water source.
Picture of SCV
PUB Mandatory test required
Material toxicity test on Non-Metallic part (Plastic)
SS375 – Suitability of non-metallic products for use in contact with water intended for human consumption with regard to their effect on the quality of the water
Material toxicity test for Matellic part (Metal)
AS/NZS4020 – Testing of products for use in contact with drinking water
Performance test require
BS5154 – Dimensions and tolerances of body ends and pressure testing
BSEN14451 – Devices to prevent pollution by backflow of potable water for in-line anti-vacuum valves