Wasteflow with Pop-Up Waste and L10 Trap: Chrome Plated Brass Control Knob: Chrome Plated Stainless Steel Waste Flange and Plug Size: 1½" (1.1/2") Water Seal: 75mm Flange Style: Chrome Plated Stainless Steel Anti Syphon Available: Yes Flange Size: 70mm With Overflow: With Overflow Standard: EN 274-1:2002 Please Note: Bath Wasteflow units enable the overflow and/or warning pipe from a cold water storage cistern and a WC flushing cistern (not fitted with an integral overflow) to be installed so that the discharge is directed into the bath via the bath Overflow Grating