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Common Problems

Slow Drains Throughout the House? It's Probably the Main Line

Published August 20, 2026 · 5 min read

One slow sink is a local clog. But when the kitchen, bathrooms, and laundry all drain sluggishly at the same time, the trouble is almost always farther downstream — in the main line everything shares.

Read the Pattern

The tell is simultaneity. If running the washing machine makes the basement floor drain back up, or flushing a toilet slows the tub, the blockage is in the main line below where your branch drains join together.

Why It Needs Prompt Attention

A partially blocked main is a backup waiting to happen. Every load of laundry and every shower pushes more water toward a bottleneck that's already struggling. Clearing it now prevents raw sewage from coming up the lowest drain in the house.

The Fix

We clear the main through your cleanout and, if the clog keeps returning, camera the line to find out why. Roots, grease, and bellies are the usual suspects.

Need help with this in your home? NJ Sewer Guy serves all of New Jersey with 24/7 sewer and drain service. Call 973-793-1910 or request service online.