Where should a vacuum breaker be placed?

A pressure vacuum breaker should be placed a minimum of 12 inches above all downstream outlets and pipings.

How to maintain a vacuum breaker?

Periodically inspect the vacuum breaker for signs of wear / damage and replace it if necessary.

How to install a vacuum breaker?

Shut the water supply off and drain the system to remove the existing water.Place the vacuum breaker as per the instructions and general codes & regulations.Test the vacuum breaker to make sure that it is working properly.Fill up the system by turning on the water supply again.

Vacuum Breakers

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Vacuum breakers are used in the chemical and pharmaceutical industries to prevent vacuum formation in a piping system. They allow air to enter the system when the pressure drops. Raptor Supplies... Read More

WATTS -

Vacuum Breaker Backflow Preventers

Style	Model	Backflow Preventer Type	Inlet Size	Item	Max. Temp.	Min. Temp.	Price (inc. GST)
A	N9C-M5	Dual Check with Atmospheric Vent	3/8"	Dual Check Vacuum Breaker	140° F	33° F	SGD 476.88	RFQ
B	731FR	Vacuum Breaker	3/4"	Vacuum Breaker	180° F	32° F	SGD 164.65	RFQ

SLOAN -

Vacuum Breakers

Style	Model	Size	Price (inc. GST)
A	323242	-	SGD 76.14	RFQ
A	393023	-	SGD 176.10	RFQ
A	393054	-	SGD 153.16	RFQ
A	393061	-	SGD 153.16	RFQ
A	393055	-	SGD 133.17	RFQ
A	393059	-	SGD 95.54	RFQ
A	393056	-	SGD 98.98	RFQ
A	393050	-	SGD 173.43	RFQ
A	393053	-	SGD 189.29	RFQ
A	393033	-	SGD 106.16	RFQ
A	393032	-	SGD 170.71	RFQ
A	393040	-	SGD 100.78	RFQ
A	393012	-	SGD 178.04	RFQ
A	393011	-	SGD 90.16	RFQ
A	393068	-	SGD 153.06	RFQ
A	393022	-	SGD 204.22	RFQ
A	5323006	-	SGD 37.71	RFQ
A	5323010	-	SGD 37.71	RFQ
A	3301447	-	SGD 27.86	RFQ
A	3301446	-	SGD 28.53	RFQ
A	3301445	-	SGD 28.53	RFQ
A	3301444	-	SGD 27.86	RFQ
A	323112	-	SGD 35.65	RFQ
A	323092	-	SGD 107.08	RFQ
A	323063	-	SGD 87.83	RFQ

WATTS -

Vacuum Breaker

Style	Model	Material	Price (inc. GST)
A	8B	Brass	SGD 44.54
B	8BI	Brass	SGD 25.87
C	8BC	Chrome-Plated Brass	SGD 83.79

WATTS -

LF288A Series, Anti-Siphon Vacuum Breaker

Style	Model	Height	Inlet Size	Outlet Size	Size	Width	Price (inc. GST)
A	LF288A-3/8"	2.25"	3/8"	3/8"	3/8"	1.75"	SGD 261.44
B	LF288A-1/4"	2.25"	1/4"	1/4"	1/4"	1.75"	SGD 235.39
C	LF288AC-1/4"	2.25"	1/4"	1/4"	1/4"	1.75"	SGD 237.40
D	LF288AC-3/8"	2.25"	3/8"	3/8"	3/8"	1.75"	SGD 317.99
E	LF288AC-1/2"	2.75"	1/2"	1/2"	1/2"	2"	SGD 302.58
F	LF288A-1/2"	2.75"	1/2"	1/2"	1/2"	2"	SGD 207.34
G	LF288AC-3/4"	3"	3/4"	3/4"	3/4"	2.25"	SGD 510.14
F	LF288A-3/4"	3"	3/4"	3/4"	3/4"	2.25"	SGD 292.55
H	LF288AC-1"	3.625"	-	-	1"	2.875"	SGD 715.08
I	LF288A-1"	3.625"	-	-	1"	2.875"	SGD 452.99

WATTS -

LF8B Series, Hose Connection Vacuum Breakers

Style	Model	Height	Width	Price (inc. GST)
A	LF8B	1.5"	1.38"	SGD 62.10
B	LF8BC	1.5"	1.38"	SGD 154.42
C	LF8FR	1.75"	1.75"	SGD 175.26

WATTS -

LF289 Series, Spill Resistant Vacuum Breaker

Style	Model	Height	Inlet Size	Outlet Size	Size	Width	Price (inc. GST)
A	LF289-1/2"	3.75"	1/2"	1/2"	1/2"	2"	SGD 584.52
B	LF289-3/4"	5"	3/4"	3/4"	3/4"	3.75"	SGD 1190.36

PLAST-O-MATIC -

VBM Series Compact And Self Closing Vacuum Breakers

Style	Model	Height	Material	Seal	Size	Temp. Range	Width	Price (inc. GST)
A	VBM075EP-CP	-	CPVC	EPDM	3/4"	-	-	SGD 508.24	RFQ
A	VBM050EP-CP	-	CPVC	EPDM	1/2"	-	-	SGD 409.74	RFQ
A	VBM100EP-PP	-	Natural Polypro	EPDM	1"	-	-	SGD 559.46	RFQ
A	VBM075EP-PP	-	Natural Polypro	EPDM	3/4"	-	-	SGD 464.90	RFQ
A	VBM050EP-PP	-	Natural Polypro	EPDM	1/2"	-	-	SGD 386.11	RFQ
A	VBM100V-CP	-	CPVC	Viton	1"	-	-	SGD 598.86	RFQ
A	VBM075V-PF	-	PVDF	Viton	3/4"	-	-	SGD 1008.60	RFQ
A	VBM075V-CP	-	CPVC	Viton	3/4"	-	-	SGD 522.03	RFQ
A	VBM050V-CP	-	CPVC	Viton	1/2"	-	-	SGD 425.50	RFQ
A	VBM050EP-PF	-	PVDF	EPDM	1/2"	-	-	SGD 691.44	RFQ
A	VBM100EP-PV	-	PVC	EPDM	1"	-	-	SGD 360.50	RFQ
A	VBM075EP-PV	-	PVC	EPDM	3/4"	-	-	SGD 309.28	RFQ
A	VBM050EP-PV	-	PVC	EPDM	1/2"	-	-	SGD 258.06	RFQ
A	VBM075EP-PF	-	PVDF	EPDM	3/4"	-	-	SGD 992.84	RFQ
A	VBM100V-PF	-	PVDF	Viton	1"	-	-	SGD 1146.50	RFQ
A	VBM100EP-PF	-	PVDF	EPDM	1"	-	-	SGD 1126.80	RFQ
A	VBM050V-PF	-	PVDF	Viton	1/2"	-	-	SGD 713.11	RFQ
B	VBM050V-PV	4 5/16"	PVC	Viton	1/2"	140 Degrees F	2 13/32"	SGD 322.54
B	VBM050V-PP	4 5/16"	Natural Polypro	Viton	1/2"	180 Degrees F	2 13/32"	SGD 442.15
B	VBM075V-PV	4.593	PVC	Viton	3/4"	140 Degrees F	2 13/16"	SGD 420.12
B	VBM075V-PP	4.593	Natural Polypro	Viton	3/4"	180 Degrees F	2 13/16"	SGD 514.23
B	VBM100V-PP	5 7/64"	Natural Polypro	Viton	1"	180 Degrees F	2 13/16"	SGD 690.20
B	VBM100V-PV	5 7/64"	PVC	Viton	1"	140 Degrees F	2 13/16"	SGD 520.25

PLAST-O-MATIC -

VBS Series Compact And Self Closing Vacuum Breakers

Style	Model	Height	Material	Seal	Size	Temp. Range	Width	Price (inc. GST)
A	VBS400EPT-PF	-	PVDF	EPDM	4"	-	-	SGD 9987.53	RFQ
A	VBS400VT-CP	-	CPVC	FKM	4"	-	-	SGD 4692.37	RFQ
A	VBS300EPT-PF	-	PVDF	EPDM	3"	-	-	SGD 7668.93	RFQ
B	VBS200VT-PF	-	PVDF	FKM	2"	-	-	SGD 4101.39	RFQ
B	VBS150VT-PF	-	PVDF	FKM	1 1/2"	-	-	SGD 3240.53	RFQ
A	VBS400VT-PF	-	PVDF	FKM	4"	-	-	SGD 10497.74	RFQ
A	VBS300VT-PF	-	PVDF	FKM	3"	-	-	SGD 7688.63	RFQ
B	VBS200EPT-PF	-	PVDF	EPDM	2"	-	-	SGD 4083.66	RFQ
B	VBS150EPT-PF	-	PVDF	EPDM	1 1/2"	-	-	SGD 3216.89	RFQ
A	VBS400EPT-PP	-	Natural Polypro	EPDM	4"	-	-	SGD 3285.84	RFQ
A	VBS400VT-PP	-	Natural Polypro	FKM	4"	-	-	SGD 3441.46	RFQ
A	VBS300EPT-PP	-	Natural Polypro	EPDM	3"	-	-	SGD 2551.06	RFQ
B	VBS200EPT-PP	-	Natural Polypro	EPDM	2"	-	-	SGD 1302.12	RFQ
B	VBS150EPT-PP	-	Natural Polypro	EPDM	1 1/2"	-	-	SGD 1093.31	RFQ
A	VBS400EPT-CP	-	CPVC	EPDM	4"	-	-	SGD 4621.45	RFQ
A	VBS300EPT-CP	-	CPVC	EPDM	3"	-	-	SGD 2931.25	RFQ
A	VBS300VT-CP	-	CPVC	FKM	3"	-	-	SGD 2948.98	RFQ
B	VBS200EPT-CP	-	CPVC	EPDM	2"	-	-	SGD 1530.63	RFQ
B	VBS200VT-CP	-	CPVC	FKM	2"	-	-	SGD 1546.39	RFQ
B	VBS150EPT-CP	-	CPVC	EPDM	1 1/2"	-	-	SGD 1150.44	RFQ
B	VBS150VT-CP	-	CPVC	FKM	1 1/2"	-	-	SGD 1166.20	RFQ
A	VBS400EPT-PV	-	PVC	EPDM	4"	-	-	SGD 2598.33	RFQ
A	VBS400VT-PV	-	PVC	FKM	4"	-	-	SGD 2673.19	RFQ
A	VBS300EPT-PV	-	PVC	EPDM	3"	-	-	SGD 1971.90	RFQ
B	VBS200EPT-PV	-	PVC	EPDM	2"	-	-	SGD 1048.00	RFQ

PLAST-O-MATIC -

VB Series Compact And Self Closing Vacuum Breakers

Style	Model	Seal	Size	Price (inc. GST)
A	VB075EP-TF	EPDM	3/4"	SGD 1178.02	RFQ
A	VB100EP-TF	EPDM	1"	SGD 1233.17	RFQ
A	VB075V-TF	Viton	3/4"	SGD 1193.78	RFQ
A	VB100V-TF	Viton	1"	SGD 1244.99	RFQ

WATTS -

Anti Siphon Vacuum Breakers

Style	Model	Body Material	Inlet Size	Inlet Thread Type	Max. Temp.	Max. Working Pressure	Mfr. Series	Min. Temp.	Operation	Price (inc. GST)
A	288AC-MB	Brass	3/8"	NPT	180° F	125 psi	288A	-	Non Continuous	SGD 243.22
B	800M4-QT 1 1/4	Bronze	1 1/4"	NPT	140° F	150 psi	800M4QT	33° F	Continuous	SGD 968.37	RFQ
C	800M4-QT 2	Bronze	2"	NPT	140° F	150 psi	800M4QT	33° F	Continuous	SGD 1246.60	RFQ
D	LF800M4QT 3/4	Lead Free Bronze	3/4"	-	140 Degree F	10.3 Bar	LF800M4QT	33 Degree F	Continuous	SGD 249.04	RFQ
E	LF800M4-QT 1 1/2	Lead Free Bronze	1 1/2"	NPT	140° F	150 psi	LF800M4QT	33° F	Continuous	SGD 1192.08	RFQ
F	LF800M4QT 2	Lead Free Bronze	2"	NPT	140° F	150 psi	LF800M4QT	33° F	Continuous	SGD 1557.43	RFQ
G	LF800M4QT 1/2	Lead Free Bronze	1/2"	NPT	140° F	150 psi	LF800M4QT	33° F	Continuous	SGD 605.31	RFQ
H	LF800M4-QT 1 1/4	Lead Free Bronze	1 1/4"	FPT	140° F	150 psi	LF800M4QT	33° F	Continuous	SGD 1226.94

WATTS -

Atmospheric Vacuum Breakers

Style	Model	Price (inc. GST)
A	LF8AC	SGD 110.50
B	LF8A	SGD 150.34
C	LF8C	SGD 141.69
D	LF8	SGD 124.39

WATTS -

Resistant Pressure Vacuum Breakers

Style	Model	Inlet Size	Max. Temp.	Max. Working Pressure	Min. Temp.	Outlet Connection	Outlet Size	Outlet Type	Seat Material	Price (inc. GST)
A	800M4-FR 1 1/2	1 1/2"	140° F	150 psi	33° F	Female Threaded	1-1/2"	Female Threaded	Engineered Plastic	SGD 1235.48	RFQ
B	U800M4-FR 1	1"	140° F	150 psi	33° F	Union Joint	1"	Union Joint	Plastic	SGD 561.67	RFQ
C	800M4-FR-SH 1/2	1/2"	140° F	150 psi	33° F	Female Threaded	1/2"	Female Threaded	Plastic	SGD 602.03	RFQ
D	800M4-FR 2	2"	140° F	150 psi	33° F	Female Threaded	2"	Female Threaded	Plastic	SGD 1380.73	RFQ
E	800M4FR 3/4	3/4"	140 Degree F	10.3 Bar	33 Degree F	-	3/4"	Female Threaded	Engineered Plastic	SGD 310.02	RFQ

WATTS -

Dual Check Vacuum Breakers

Style	Model	Item	Price (inc. GST)
A	LFN9CD	Dual Check Vacuum Breaker	SGD 495.04
B	3/8 LF N9C - 3/8"	Dual Check Vacuum Breaker	SGD 367.43
C	LFN9-CD-C 3/4	Vacuum Breaker	SGD 520.22

WATTS -

Dual Check Vacuum Breaker Backflow Preventers

Style	Model	Inlet Size	Price (inc. GST)
A	N9 1/4	1/4"	SGD 320.64	RFQ
B	N9-CD-C	3/4"	SGD 442.79	RFQ

WATTS -

Freeze Resistant Vacuum Breakers

Style	Model	Inlet Size	Max. Temp.	Max. Working Pressure	Min. Temp.	Outlet Size	Seat Material	Price (inc. GST)
A	LF800M4FR 1	1"	140° F	150 psi	33° F	1"	Engineered Plastic	SGD 394.22	RFQ
B	LF800M4FR 3/4	3/4"	140 Degree F	10.3 Bar	33 Degree F	3/4"	Plastic	SGD 356.71	RFQ

WATTS -

Freeze Resistant Pressure Vacuum Breaker Backflow Preventers

Style	Model	Inlet Size	Price (inc. GST)
A	767FR 1 1/4	1 1/4"	SGD 1317.49	RFQ
A	767FR 3/4	3/4"	SGD 496.22	RFQ

WATTS -

Pressure Vacuum Breaker Backflow Preventers

Style	Model	Inlet Size	Price (inc. GST)
A	767FR 1 1/2	1 1/2"	SGD 1481.09	RFQ
A	767FR 1	1"	SGD 520.22	RFQ
A	767FR 2	2"	SGD 1664.32	RFQ

WATTS -

Dual Check Backflow Preventers

Style	Model	Item	Price (inc. GST)
A	1X1 LF7R10-U2	Backflow Preventer	SGD 264.04
B	3/8 SD3-FN	Backflow Preventer	SGD 816.10
B	3/8 SD3-MN	Backflow Preventer	SGD 730.51
C	3/4 9DM2-PRESS	Dual Check Valve	SGD 261.73

ZURN -

Vacuum Breakers

Style	Model	Connection Type	Height	Item	Max. Pressure	Size	Width	Price (inc. GST)
A	14-ZWFR	-	-	Valve	-	-	-	SGD 251.81
B	12-35XLCH	-	-	Vacuum Breaker	-	-	-	SGD 99.60
C	114-720A	-	-	Vacuum Breaker	-	-	-	SGD 855.16
D	1-710	-	-	Vacuum Breaker	-	-	-	SGD 158.99
E	1-720AFT	-	-	Vacuum Breaker	-	-	-	SGD 617.19
F	1-720AU	-	-	Vacuum Breaker	-	-	-	SGD 795.96
G	1-460XL	-	-	Vacuum Breaker	-	-	-	SGD 709.98
H	1-420XL	-	-	Vacuum Breaker	-	-	-	SGD 328.60
G	12-460XL	-	-	Vacuum Breaker	-	-	-	SGD 502.26
G	34-460XL	-	-	Vacuum Breaker	-	-	-	SGD 575.47
I	34-710	-	-	Vacuum Breaker	-	-	-	SGD 136.95
J	34-420XL	-	-	Vacuum Breaker	-	-	-	SGD 289.44
K	BFP-9CH	-	-	Vacuum Breaker	-	-	-	SGD 36.61
L	G67991	MNPT	9.125"	Vacuum Breaker	35 psi	6	6.5"	SGD 183.52
M	Z7000-VB	Npt	1 53/64"	Vacuum Breaker	125 psi	1/2"	1 13/64"	SGD 58.27

NICHOLSON -

Atmospheric Vacuum Breakers

Style	Model	Price (inc. GST)
A	VB0500	SGD 234.03
B	VB0500-SS	SGD 314.50
A	VB0750	SGD 252.81
B	VB0750-SS	SGD 365.88

APOLLO VALVES -

38LF-100 Series Atmospheric Type Vaccum Breakers
Apollo 38LF-100 Series atmospheric-type vacuum breakers are used in water supply systems to prevent backflow and protect potable water from contamination. These vacuum breakers are installed in plumbing systems, irrigation systems and industrial applications where there is a risk of back-siphonage. When water pressure drops, these devices automatically open to admit air, breaking the vacuum and preventing the reverse flow of non-potable water into the clean water supply. They feature bronze construction with polished chrome finish for resisting corrosion on exposed surfaces. These vacuum breakers can be operated at pressures up to 125 psi.

Style	Model	Height	Material	Size	Temp. Range	Width	Price (inc. GST)
A	38LF10301	2.5"	Lead-Free Bronze	1/2"	212 Degrees F	1.187"	SGD 124.37
A	38LF10303	2.5"	Lead-Free Bronze-Rough Chrome	1/2"	212 Degrees F	1.187"	SGD 164.12
A	38LF10103	2.375"	Lead-Free Bronze-Rough Chrome	1/4"	212 Degrees F	1 13/16"	SGD 88.72
A	38LF10101	2.375"	Lead-Free Bronze	1/4"	212 Degrees F	1 13/16"	SGD 108.88
A	38LF10201	2.375"	Lead-Free Bronze	3/8"	212 Degrees F	1 13/16"	SGD 95.29
A	38LF10203	2.375"	Lead-Free Bronze-Rough Chrome	3/8"	212 Degrees F	1 13/16"	SGD 189.21
A	38LF10401	3 1/16"	Lead-Free Bronze	3/4"	212 Degrees F	2.12"	SGD 138.68
A	38LF10403	3 1/16"	Lead-Free Bronze-Rough Chrome	3/4"	212 Degrees F	2.12"	SGD 197.33
A	38LF10501	4 1/16"	Lead-Free Bronze	1"	212 Degrees F	2.875"	SGD 223.11
A	38LF10801	4.5"	Lead-Free Bronze	2"	180 Degrees F	3.75"	SGD 539.01
A	38LF10601	4.375"	Lead-Free Bronze	1.25"	140 Degrees F	3.75"	SGD 486.44
B	38LF10701	4.375"	Lead-Free Bronze	1.5"	180 Degrees F	3.75"	SGD 460.23

123 4

Vacuum Breakers

Vacuum breakers are designed to prevent back-siphonage of water due to the generation of vacuum in water drainage systems. Raptor Supplies offers a wide range of vacuum breakers from brands like Apollo, Watts, Hayward, Wilkins, Morse, Plast-O-Matic, Sharkbite and Chicago Faucets. Apollo 38-100, 38-200, 38-500 and 38LF-100 Series vacuum breakers are ideal for a maximum pressure of 150 PSI and are available in 1/4 to 2 inch pipe sizes. The brand's 38-100 Series vacuum breakers prevent backflow of polluted water in portable water supply by breaking the vacuum generated during drainage of water. These ASSE 1001 certified breakers feature a heat-resistant silicone seat disc and a check valve with an air inlet. Watts ANSI, ASSE and NSF compliant vacuum breakers also have a maximum pressure withstanding rating of 150 PSI. These vacuum breakers are available in brass, bronze, chrome plated brass, lead free bronze, lead free brass and polished chrome body material variants.

Working Mechanism

Atmospheric vacuum breakers consist of a spring-loaded valve held closed by a diaphragm.
When a vacuum is detected, the diaphragm collapses to allow air to enter the piping system and break the vacuum.

Categories

Brands

Vacuum Breakers

Vacuum Breaker Backflow Preventers

Vacuum Breakers

Vacuum Breaker

LF288A Series, Anti-Siphon Vacuum Breaker

LF8B Series, Hose Connection Vacuum Breakers

LF289 Series, Spill Resistant Vacuum Breaker

VBM Series Compact And Self Closing Vacuum Breakers

VBS Series Compact And Self Closing Vacuum Breakers

VB Series Compact And Self Closing Vacuum Breakers

Anti Siphon Vacuum Breakers

Atmospheric Vacuum Breakers

Resistant Pressure Vacuum Breakers

Dual Check Vacuum Breakers

Dual Check Vacuum Breaker Backflow Preventers

Freeze Resistant Vacuum Breakers

Freeze Resistant Pressure Vacuum Breaker Backflow Preventers

Pressure Vacuum Breaker Backflow Preventers

Dual Check Backflow Preventers

Vacuum Breakers

Atmospheric Vacuum Breakers

Vacuum Breakers

Working Mechanism

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