The Fluidmaster compact dual flush syphon is WRAS approved. The syphon is a leak free component, if the back nut is tightened sufficiently the cistern cannot leak. FLUIDMASTER 8" COMPACT DUAL FLUSH SYPHON.
HOUSLER Compact Dual Flush Adjustable Toilet Syphon – Cistern Siphon with Adjustable Height & Flush, Universal 1.5" Base Bottom Outlet, WC Cistern Replacement, DIY Fit – WRAS, UPC, CE Approved
600Watt All-in-One Upflush Toilet System with Built-in Macerator Pump | Tankless | Compact, Dual Flush Design for Basements, Attics & Small Bathrooms | 4/5 HP Motor
Todikaper Dual Flush Toilet Cistern Push Button Replacement With 20Mm 40Mm 50Mm 60Mm Aperture, ABS Construction For Fluidmaster PRO550UK And Skylo Valve Models (Chrome+Ring)
Glewi Dual Flush Toilet Cistern Push Button, ABS Replacement Actuator for Fluidmaster PRO550UK & Skylo SKY005, 20-60mm Aperture, Chrome(Chrome)
Fluidmaster 800P-001 Valve Replacement Dual Flush Valev Buttons, Chrome
Fluidmaster PRO550UK Cable Push Button Dual Flush Valve 1 1/2" 2" Cistern Spare