Why Your Drains Keep Clogging (And How to Fix It for Good)

If you're reaching for the plunger every few weeks, you don't have a clog problem — you have a buildup problem. A drain that clogs repeatedly is telling you something a plunger can't fix. Here's what's really going on inside your pipes.

The buildup you can't see

Every time water goes down a drain, it leaves a little residue behind: grease in the kitchen, hair and soap scum in the bathroom, mineral scale everywhere. Over months and years, these layers narrow the pipe until even normal use causes a backup.

Kitchen drains: grease is the enemy

Grease and fats go down as a warm liquid, then cool and harden onto pipe walls like cholesterol in an artery. No amount of hot water permanently fixes this — it just moves the problem further down the line.

Bathroom drains: hair and soap

Hair binds with soap scum to form dense mats that catch everything else. These are the most common cause of slow shower and sink drains.

When the problem is deeper

If multiple drains in your home are slow at the same time, or you hear gurgling when you flush, the issue may be in your main sewer line — not the individual fixtures. Common culprits include:

• Tree root intrusion into older clay or cast-iron sewer lines
• A 'bellied' or sagging pipe that collects debris
• Grease accumulation in the main line
• Pipe corrosion or partial collapse in aging systems

Why store-bought drain cleaners make it worse

Chemical drain cleaners generate heat and can corrode older pipes, damage seals, and only punch a small hole through a clog rather than removing it. The clog reforms quickly, and now your pipe is damaged too.

The permanent fix: professional cleaning

Two professional methods actually solve recurring clogs. Motorized augering (snaking) cuts through and pulls out blockages, while hydro-jetting uses high-pressure water to scour the entire pipe wall clean — removing years of buildup rather than just breaking through it.