**Yes—small grease traps exist and can be installed on a home’s kitchen drain**, subject to local plumbing and septic requirements. Search for *compact hydromechanical grease interceptors*. They often use the same designs sold for commercial kitchens, just in smaller sizes: for example, Zurn’s GT2700-04 is rated for 4 gallons per minute and holds 8 pounds of grease. That illustrates the available size; it isn’t necessarily the right size for your sink. [Zurn catalog](https://www.zurn.com/Media-Library/web_documents/pdfs/pricelists-%281%29/230-001-Commercial-Drainage-Customer-Guide_LOW)

A properly sized interceptor **could reduce grease reaching your pipes and septic tank**. It separates and retains grease so you can remove it. The tradeoff is another maintenance chore: you must regularly open and clean it, and neglected units can clog or smell. Installation needs suitable flow control, venting, and access for cleaning. Have a plumber select the size and confirm local requirements. [Manufacturer installation guidance](https://imvr.josam.com/images/josammkt/zzother/td_GI-Inst.pdf)

For your recurring blockage, I would take these steps:

- **Keep as much grease out of the sink as possible.** Collect cooking fat and oil separately, scrape dishes, and wipe greasy pans before washing. A grease trap supplements those habits. EPA advises against putting fats, oils, or grease down septic drains. [EPA septic guidance](https://www.epa.gov/septic/frequent-questions-septic-systems)
- **Have the recurring blockage location inspected before buying a trap.** Grease may be the material blocking the pipe, while a sag, poor slope, rough old pipe, or a tank inlet problem helps it accumulate. A plumber or septic contractor can assess that; a camera inspection after cleaning may help. A new trap will not remove deposits already in the line.
- **Reconsider the monthly bacteria additive.** Normal septic systems already contain the bacteria they need. EPA says additives are generally unnecessary and some can impair operation; they are not a reliable remedy for grease buildup. [EPA additives fact sheet](https://nepis.epa.gov/Exe/ZyPURL.cgi?Dockey=P101BVSO.txt)

So, a compact interceptor is a reasonable option to discuss with your plumber, but twice-yearly clogs in an old system warrant checking the pipe and tank inlet as well as controlling kitchen grease.