McMaster-Carr logo
    Filter by
    Pipe Size
    Industrial Info Compare
    Body Material
    For Use With
    Thread Type
    Connects To
    Fitting Connection
    Gender
    Maximum Pressure @ Temperature
    Connection Port
    Valve Type
    U.S.–Mexico–Canada Agreement (USMCA) Qualifying
    Certification
    DFARS Specialty Metals
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    Minimum Temperature
    Port-to-Port Length
    Attribute Image
    Flow Coefficient (Cv)
    Seal Material
    Fitting Type
    Mounting Position
    Maximum Temperature
    Forward
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Print
    How can we improve?
    Comments
    E-mail address (if you would like a response)
    4 Products

    Vacuum Breakers

    Also known as vacuum-breaking valves, these valves have vents that open when pressure drops to relieve vacuum conditions and prevent backward suction from drawing liquid into upstream piping.
    90° Elbow
    Image of Product. Front orientation. Contains Annotated. Vacuum Breakers. Vacuum Breakers, 90° Elbow.
    Elbows are designed for intermittent flow. They discharge liquid directly and should not be installed in areas where spillage could cause damage.
    Chrome-Plated Bronze Body—Chrome-plated bronze valves are more corrosion resistant than brass valves.
    Chrome-Plated
    Bronze Body
    Inlet Pipe
    Size
    Outlet
    Pipe SIze
    Max. Pressure
    @ Temp.
    Temp. Range,
    ° F
    Port-to-Port
    Lg.
    Seal Material
    For Use
    With
    Each
    NPT Female Inlet × NPT Female Outlet
    1/4
    		1/4
    		125 psi @ 70° F35 to 1801"Silicone Rubber
    		Water9903K31000000
    3/8
    		3/8
    		125 psi @ 70° F35 to 1801"Silicone Rubber
    		Water9903K3300000
    1/2
    		1/2
    		125 psi @ 70° F35 to 1801 1/4"Silicone Rubber
    		Water9903K3500000
    3/4
    		3/4
    		125 psi @ 70° F35 to 1801 1/2"Silicone Rubber
    		Water9903K3700000
     
    back to top