About Roebic
Roebic Laboratories was founded in 1959 in New Haven, Connecticut, to make environmentally friendly products for home sewage and septic systems rather than the harsh caustics that dominated the category at the time. What started as five basic items has grown into a catalog of more than 35 products, and the company still develops them with microbiologists on staff rather than simply reformulating off-the-shelf surfactants. Roebic Technology, a company subsidiary, holds patents on the RoeTech line of bacterial cultures used across its septic and drain products, engineered specifically to digest fats, oils, greases, proteins, starch, and cellulose.
That bacterial-enzyme approach is the throughline of the whole product line, from septic tank and cesspool treatments to main line and drain-trap cleaners to root killers and RV holding-tank treatments. It is a different philosophy from the bleach- and lye-based cleaners that share shelf space with Roebic at hardware stores: instead of a one-time chemical reaction, live bacteria keep digesting organic buildup as long as the product is dosed on schedule, which is why plumbing supply houses, institutional foodservice operators, and agricultural businesses use Roebic products for ongoing maintenance rather than emergency response. Roebic K-97, the main line cleaner we rank on DIYRated, is one of the company's original maintenance formulas and is built to be safe for septic tanks and older or plastic pipe alike.
Brand website: roebic.com
What Roebic makes
Roebic's range runs wider than the products we rank. We feature the lines that won their DIYRated categories:
Septic tank & cesspool treatments
K-37 Septic Tank Treatment, K-47 Cesspool Treatment, K-570 leach and drain field treatment
Drain & main line maintenance cleaners
K-97 Main Line Cleaner and K-67 Drain BuildUp Remover — bacterial-enzyme formulas for ongoing upkeep — featured on DIYRated
Root killers
K-77 Root Killer and a foaming root killer for sewer-line tree root intrusion
Drain openers
Professional Strength Crystal and Pro Strength Liquid drain openers for faster clearing
Soap & grease digesters
K-87 Soap Destroyer and garbage disposal cleaner for grease trap and disposal maintenance
RV, marine & composting treatments
Holding tank treatments for RV and marine use, plus compost accelerators
Why we recognized Roebic
The DIYRated Top Brand recognition isn't paid for and can't be applied for. We award it to the brands whose products independently earn top-pick status in our hands-on category reviews. Roebic earned it because its products came out on top in 1 DIYRated guide — evaluated the same way every product on this site is: bought, put to work on real jobs, and judged on merit.
Roebic products we feature
Roebic K-97 Liquid Main Line Cleaner
A bacterial-enzyme formula that is genuinely safe to pour every month, digesting the organic buildup that becomes tomorrow's clog before it forms. It's built for septic tanks and sewer main lines rather than just fixtures, so it maintains the whole system, and with no caustic chemicals it's safe for every pipe material, including old and plastic pipe.
Read the 11 Best Drain Cleaners of 2026: A Contractor's Picks by Clog Type guide →What earned Roebic the recognition
- Sixty-plus years developing bacterial-enzyme wastewater products out of New Haven, Connecticut, since 1959 — one of the longer continuous track records in the septic and drain-maintenance category.
- Roebic Technology, a company subsidiary, holds patents on the RoeTech bacterial cultures used across the product line, backed by microbiologists on staff rather than a generic surfactant reformulation.
- K-97 is one of the few main line cleaners genuinely engineered for septic systems as well as municipal sewer lines, where most bleach- and lye-based competitors are labeled only 'septic-safe' rather than septic-beneficial.
- A 35-plus product catalog spanning septic tanks, drain traps, root killers, and RV holding tanks means the same bacterial-treatment philosophy covers a homeowner's entire wastewater system, not just one fixture.
- Trusted by plumbing supply houses, institutional foodservice operators, and agricultural businesses in addition to retail hardware and home centers — commercial-grade adoption for a product line homeowners can also buy off the shelf.