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
Fluidmaster Compact Concealed Pre-Assembled Cistern with Fluidmaster 550 Flush Valve, Airgap 6000 Water Saving Fill Valve and Accessories (1000E-015-P1)
Fluidmaster Exposed Cistern Exposed Cistern with 7 1/2" Compact Syphon, Bottom Entry Airgap 6000 Plastic Shank Fill Valve and Accessories.
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