Has anyone here dealt with a recurring kitchen backup that just won't stay clear? I’ve been looking into why some main lines seem to clog up every few months even after using standard retail cleaners or a snake. It seems like in a lot of these older residential areas, the cast iron pipes get a rough internal texture over decades of use.

When you cook, even if you are careful, some fats and oils inevitably make it down the sink. Once that liquid hits the cold buried pipe outside, it solidifies. Over time, this creates a thick, waxy lining that catches food particles and hair. A standard snake usually just pokes a small hole through the center of the grease, which is why the drain opens up for a week but then closes right back up as soon as more debris hits it.

From what I’ve gathered, the only way to actually remove grease buildup pipes long-term is to use high-pressure water. It’s basically like power washing the inside of the sewer line. It’s interesting how much "sludge" can actually sit in a 4-inch pipe without fully stopping the flow, at least until it's too late.

Has anyone in the group tried hydro jetting for this, or do you just stick to the routine of snaking it every year? I’m curious if the water pressure is safe for older pipes or if it's better to just keep doing the temporary fixes.