Yes, Peter, it’s written in all of our deeds that we are all liable for 1/5 of the cost of maintaining, repairing or replacing the system. Yes they are aware of the small electricity usage but are ‘green’!
I’m not sure legally we could tell them to get a separate one themselves. We also have an issue with another neighbour who delays paying the maintenance for months until I have sent him 3 bills and threaten to take him to court! Never again would I buy a house with a shared sewage treatment works!
We looked at the Klargester Biodisc but feel there are so many moving parts that may be an issue. If the pump on a new system can be situated separately and under the ground then that may be an option Timedout.
If we can get our neighbour to agree!