Overflowing Manhole and a Sewage Smell? What to Do and Why It Happens

The manhole (inspection chamber) is where your home's drains collect before joining the public network. When the line after it blocks, water rises until it overflows into the yard or basement — and may back up through ground-floor drains.

Warning signs

• A strong sewage smell near the yard or entrance.
• Ground-floor drains emptying slower than upstairs.
• Gurgling toilets when the washing machine runs.
• Water or damp around the manhole cover.

Why manholes overflow

1. A blocked line to the street — grease, wet wipes and hair are the usual suspects.
2. Tree roots entering joints in search of moisture.
3. A broken or sagging pipe where water and debris collect.
4. A problem in the public sewer — if neighbours have the same issue at the same time, that's a strong clue.

What to do straight away

1. Cut water use immediately: no washing machine, showers or flushing if possible.
2. Keep children away — sewage carries bacteria.
3. Don't reach into the chamber without gloves and protection.
4. Don't pour strong chemicals; they won't clear a main line and may damage pipes.
5. Call a drain technician with pumping equipment.

How we fix it

With our drain unblocking service we pump out the chamber, run a camera into the line to find the blockage and its cause, clear it with a high-pressure jetter and clean the chamber. If the camera shows a broken section, we repair just that spot.

Preventing it

• Don't pour cooking oil down the sink.
• Wet wipes go in the bin, even "flushable" ones.
• Have the line checked periodically if trees are nearby.
• Schedule preventive chamber cleaning, especially in older homes.

Summary

An overflowing manhole can't wait. Cut water use, keep the family away and call us — we'll bring pumping, a camera and a jetter and clear the blockage at its source.