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age_group:
18+
category:
Backwater Valves
country_of_origin:
USA
manufacturer:
Legend Valves
mpn:
202-253
pdf:
["https://legendvalve.com/documents/pdf/S-640.pdf"]
type:
Backwater Valves
upc:
662545010519
S-640 Product Description
The S-640 backwater PVC valve is in solvent x solvent configuration. The stepped body design places the inlet socket-end higher than the outlet, promoting the correct drop-per-foot and improving flow efficiency. The lid and flapper are equipped with o-rings assuring a positive seal-out of sewer gasses. Designed for horizontally-installed, low pressure gravity-flow DWV systems only, not suitable for upward-flow or pressurized systems.