Knockout Drain Toilets & Urinal Unblocker 500ml Caustic Liquidfrom £5.72 up to £32.50 Compare prices6→Knockout Drain Toilets and Urinal Unblocker 500ml Caustic LiquidPowerful outside drain and toilet unblocker designed to be a safer alternative to sulphuric acid unblockersRapidly dissolves organic mat more→erial to free up blockagesBoosted caustic liquid
