Application Range: This drain blaster can effectively remove hair,cloth,tea,vegetable,leaves,grease,accessory and rubbish from pipelineare, but not suit for urine alkali, cement, hard object. And better to use it unclogged hard pipes such as iron pipes, PVC pipes and PPR pipes rather than soft pipes such as rubber hose and plastic hoseHow to use:(1) .Install the appropriate plug according to the size of the pipe diameter (2) .Pump up the hand pump about 10-20 times, until could not pump into the air to get high pressure gas (3) .Block pipe outlet, have it sealed; Pull the trigger to release the high pressure gas.(you could have it repeated till dredge the pipeline.) Precautions:(1) The mouth of the outlet must be immersed in the blocked fluid to guarantee air pressure.You should add enough water into the sinks,pipes or toilets, otherwise it will not work well.(2) If the pipeline is blocked, it is advisable to put some soft debris, making the pipeline near full blocked for better effect(3) You can use towel,rags,plastic sheet or other things to prevent water from splashing out if the pressue if too high (4) If the pool or sewer has multiple overflows, please ensure that the other overflows are closed before work so as to avoid accidental discharge of contaminants or affect the dredging effect.(5) Better to pump 8-10 times once,avoiding burst of water pipes caused by excessive pressure(6) This product is a pneumatic tool, please keep it away from children and do not disassemble it.Package content:1x drain blaster4x different sized suckers.5cm sucker for use on small sinks, narrow pipes, and 1.5inches drain openings6cm sucker for use on all sinks and drains with openings larger than 1.5inches11.5cm sucker for tub and shower drains20.5cm sucker for toilets and large floor drains.