The Watts BV-204 is a 4" backwater valve. It sits in the building drain and seals against reverse flow to keep sewer backups out of the building. It features a cast iron body.
This cast iron, in-line backwater valve features a gasketed access cover, a bronze seat and a bronze flapper and has 4 inch no hub connections.
Features
- Cast iron
- Bronze seat/flapper
- 4 inch no hub
- Access cover
Common Questions
- Where does this valve get installed?
- The BV-204 installs in a horizontal drain line, sized to the pipe it serves, and must stay reachable for inspection and cleaning — most codes require it.
- Will it block normal drainage?
- No. It sits normally open, so waste drains through it the way it would through plain pipe. It closes only when flow reverses, which is what keeps a surcharging sewer out of the building.
Specifications
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Size: 4"
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Body Material: Cast Iron
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Application: Drainage
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Country of Origin: China
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Warranty: 1 Year Limited
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MPN: BV-204
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Lead-Free: No
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Check Mechanism: Backwater
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Installation Orientation: Horizontal
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Disc / Flapper Material: Bronze
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Normally Open: Yes
