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6 Warning Signs of Sewer Line Trouble

Main line problems usually give warnings before a full backup. Here is what to watch for.

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1. Several slow drains

If sinks, tubs and toilets are all slow, the blockage is likely in the main line.

2. Gurgling

Gurgling toilets or drains when other fixtures run.

3. Water in odd places

Water coming up in a tub or floor drain when the toilet flushes or the washer drains.

4. Sewage smells

Smells indoors or near the cleanout.

5. Very green patches

Lush patches of lawn over the line can mean a leak.

6. Older lines

Older clay and cast-iron lines are more likely to crack or let roots in. See sewer and drain lines.

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