U704 - Backwater Valve

Additional Information:

Weight 0.55kg

For use with 4" throat vari-level/direct connection gratings and access covers. Max.flow rate of 0.3 l/s.

For installation where protection from backflow is required. Note a filter bucket cannot be fitted if a backwater valve is used. Notes: 1. If U704 is used with some trapped gullies, then grating extensions will be required as follows: G2 - G6 series - use U102 - G8 - G10 series - use U103 - GD series - use U102 - GP series - use UP104. 2. When used with some 50mm and 75mm vertical outlet bodies an extension may be required dependant on position of membrane clamping collar and grating.