Product Details

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Product Specifications

Pressure/Vacuum vent cap for UST 2 in./51mm thread-on

• Model 4620 and 4885
• The three (3) valve system provides the necessary protection and durability needed in UST and AST vent caps.
• The vacuum valve is diaphragm operated and provides ten (10) times more sealing force than gravity devices. It consistently opens at 6” – 10” of water column (WC) / 1.5 – 2.5 KPa vacuum.
• The first over-pressure valve is diaphragm operated, giving ten (10) times more sealing force than gravity devices. It opens at 2.5” – 6” WC / .63 – 1.5 KPa pressure.

• Model 4620 is not for use in California / EVR applications.
• Model 4620 is a slip-on vent cap with a main pliable seal that seals to the vent stack and provides leak proof protection because the seal is at the end of the vent stack, not on the threads.
• Model 4620 uses four (4) stainless steel set screws to grip the vent stack preventing any loosening of the seal.
• Constructed from materials 100% compatible with B0-B20 and E0-E85.