The situation you have for the filter drains is unsatisfactory, and you need to find a way of shutting each one off so they are not connected to each other.
See http://www.koicymru.co.uk/const9fa.htm
The ideal way to do it would be as shown below, but it all depends if you can get down there to fit the pipework.
Posted on Apr 30, 2005, 6:58 AM from IP address 81.132.98.185
