It's so great to be able to keep drains clear without toxins! Monkey wrench plumbing has a commitment to offer fair prices at all times most often, we meet or beat our competitors’ prices we believe that. Every contractor i talked to said this is the best boiler they have installed! Use drain out bathroom drain cleaner as needed to unclog bathroom drains for preventative drain maintenance, add / of the bottle to the drain weekly. Co-op.