The water authority are only responsible for the pipe up to the point where it crosses the boundary into your property.
After that, it becomes your responsibility.
If it crosses your boundary and then goes off to supply 2 privately owned cottages, and the corrosion is before the spur, it’s a joint responsibility between you and the cottages.
If the corrosion is after the spur, it is your responsibility.
Basically, the cottages only have responsibility if they get the benefit of the part which needs replacing.
It is different for sewers.With sewers, anything which is shared is responsibility of the utility company.
Can I clarify anything for you?
Please rate the service positive. It’s an important part of the process by which experts get paid.
We can still exchange emails.
You apportion it according to use. Hence, if you are using 10 times as much water as they are because of your commercial element, then you would pay 10 times what they would pay in respect of the repair costs.