20pcs Drain Cleaner Powder, Suitable For Kitchen, Bathroom, Drain, Toilet Clogged Pipes And Household Cleaning. Pour An Appropriate Amount Of Cleaning Powder Into The Sink Or Clogged Drain Pipe, Wait 15-30 Minutes For It To Dissolve, Then Flush The Drain Pipe With Hot Water To Clear The Blockage. Plumbing > Drain Unclogging