I need a unique logo that stands out for my plumbing business

"Go with the Flow", but I am open to suggestions or having no slogan at all.

Construction

My business is essentially a plumbing business that specializes in backflow testing, repairs, installations and surveys (no other plumbing services provided). A backflow is a device that allows water to travel one direction only (ie. it prevents contaminated water in a hospital or residential building etc. from entering the potable/clean water system). The purpose of the device is to keep our drinking water free of contaminants and pollutants. My customers are roughly 10% residential, and 90% commercial property owners. Each backflow unit is required by the City to be tested each year. I test, repair and install backflow devices, as well as survey large buildings to assess the need for new backflow units.

Like I said in the description, the purpose of a backflow is to keep our drinking water clean. I am open to the logo having a clean water and/or a direction of flow theme, but I am curious to hear other ideas. Also, I am open to some of the art being transparent, making the logo more memorable. I plan on getting a business cards, website, etc. made in the future and hope to meet some good contacts.

Every design category has flexible pricing for all budgets. Logo design starts at $399.