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FLOOD-GATE®VALVE INSTALLATION: 4 INCH (7140Y04) & 6 INCH (7140Y06)
The FLOOD-GATE® Automatic Backwater Valve is designed to protect a building and its contents from flood damage due to a backup in the sanitary sewer system and can also be used in storm sewer applications. Properly installed, the FLOOD-GATE® will provide years of trouble-free automatic service. Depending on individual circumstances, one of the two following installation guidelines must be followed:
PIT INSTALLATION:
When the FLOOD-GATE® is partially recessed or fully recessed, it must be installed in a ventilated and permanently dry (water-free) access pit in the horizontal drain line between the building and the sewer main (a sealed or flooded pit will restrict the free movement of the valve).

PIPING OPTION ONE:
The FLOOD-GATE® maybe installed in the horizontal drain line between the building and the sewer main. Although this provides complete protection from flooding, all of the plumbing fixtures in the building will be out of service once the FLOOD-GATE® is activated. In this type installation, the optional alarm system is highly recommended.

PIPING OPTION TWO:
Another installation, sometimes preferred, locates the FLOOD-GATE® Automatic Backwater Valve (Figure Number 7140) where only the fixtures installed below grade (as in a basement) are connected on the upstream side of the valve. All fixtures installed above grade are connected on the downstream (sewer) side of the valve. This allows continued use of the above grade fixtures, while protecting below grade areas from flooding.

CRITICAL INSTALLATION DATA:
The installer must abide by one critical MINIMUM dimension. This is the distance from the top of the horizontal drain line, where the FLOOD-GATE® is installed, to the top of basement floor drain. (See FLOOD-GATE® Valve Testing Instructions Illustration for minimum bury depth) An additional two (2) inches more than this minimum is suggested, so that the top of the valve cover will be situated 2” below the pit cover.

 FACTORY TESTED:
The FLOOD-GATE® VALVE must be properly installed with the proper direction of flow (as indicated by the arrows on the valve) to ensure proper functioning. Each FLOOD-GATE® valve has been thoroughly inspected and tested at the factory. If the valve is damaged during shipment, or if any service to the valve is necessary, return the complete valve to the factory for repair or replacement. DO NOT attempt to disassemble or repair the FLOOD-GATE® Automatic Backwater Valve in the field.
MAINTENANCE:
Manufacturer recommends that every (3) three months (quarterly) the building/home owner manually opens and closes the valve three (3) or four (4) times to exercise the bellows in the valve housing. This is accomplished by inserting the maintenance T-handle through the hole located in the center of the top of the valve cover and attaching to the threaded stem located on the top of the counterweight top. Once attached, pull the handle up slowly until it stops. Release the handle and allow it to return to the original postion. Repeat the action for three (3) or four (4) cycles. It is mandatory the maintenance handle be removed at the completion of the required maintenance or the unit will not function properly.
Installation Images:

View of The Flood-Gate Automatic Backwater Valve Figure No. 7140

View Looking Into Pit with The Flood-Gate Automatic Backwater Valve Figure No. 7140 installed

The Flood-Gate Automatic Backwater Valve Figure No. 7140 Installed in Concrete Pit
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