How to use:STEP1:Before used should be based on the size of the blocked pipe diameter, choose the appropriate sucker to install the product.STEP2:After the sucker is installed, you can start to inflate the air reservoir by holding the handle firmly and pumping the air pump lever to complete several full stroke twitches about 15-25 times, until could not pump into the air to get high pressure gas.STEP3:Block pipe outlet, have it sealed; Pull the trigger to release the high pressure gas.STEP4:If the first attempt fails, you can repeat this operation.Suggestions:1.Please make sure the size of the sucker is correct.2.Put a piece of waterproof film before use to prevent splashing and making a mess.3.The "sucker" should be pressed tightly against onto the drain,If the tightness is not enough,please add enough water (the sucker completely immersed in the water)to prevent air leak and guarantee air pressure.PACKAGE INCLUDE:1x Toilet Air Blaster4x different sized suckers.1x multi-purpose professional pumpYou don't have to call plumber at midnight when having shower in bathtub.No longer paying 100 USD to plumber at midnighThe Air Pressure Toilet Plunger may not be your only alternative, but to be your best effective-cost choice.