One of Cambridgeshire's oddest traditions gets under way this morning...
Wessex Water shows what not to flush - VIDEO
If you've ever wondered what happens after you flush the toilet... Wessex Water are opening the doors to their sewage treatment works.
It's all part of Sewage Week where people are being invited to learn about what they can and can't put down the loo.
Ashlea lane, Wessex Water's head of waste treatment, tells Heart:
"Everyday we have to deal with a lot of things that people put down through their toilets that they really shouldn't do."
"For instance, things like disposable wet wipes can cause blockages in the sewers which can effect the environment."
They're also warning people to stop putting fats and grease down the sink as they too can clog up drains.
More than 7,000 people came along to see the treatment works when they last opened up to the public 20 years ago.
There will be people showing tour groups around from today until Tuesday 8th July.
For more information about visiting, head to www.wessexwater.co.uk/sewageweek
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