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Sewage backflow preventing valve
A sewage backflow prevention device is installed in a gravity flow waste pipe, particularly for a residence or residences. The device includes a cylindrical body with a closed top, outflow holes in the sides, and an open bottom to be secured to the upper end of a Tee in the gravity flow sewage pipe, between the residence and the sewer. Within the cylindrical body is a hollow, floatable disk or float ball that normally closes the bottom of the backflow device preventing escape of gases. When a downstream blockage occurs, liquid rises into the device, floats the closure disk or ball upward and flows outwardly through the openings. At valve closure position the valve closure disc or ball is mostly below the outflow holes such that rats or other rodents cannot push under and lift the ball or disc.
Sewage backflow preventing valve
A sewage backflow prevention device is installed in a gravity flow waste pipe, particularly for a residence or residences. The device includes a cylindrical body with a closed top, outflow holes in the sides, and an open bottom to be secured to the upper end of a Tee in the gravity flow sewage pipe, between the residence and the sewer. Within the cylindrical body is a hollow, floatable disk or float ball that normally closes the bottom of the backflow device preventing escape of gases. When a downstream blockage occurs, liquid rises into the device, floats the closure disk or ball upward and flows outwardly through the openings. At valve closure position the valve closure disc or ball is mostly below the outflow holes such that rats or other rodents cannot push under and lift the ball or disc.
Sewage backflow preventing valve
DILLINGHAM BENJAMIN (author)
2022-04-12
Patent
Electronic Resource
English
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