Yeah, but with the way the water circulates in the neighbourhood, I would say there are several 'balance points'.... the road behind our one is the same setup, two/three way feed, fed by the big cast iron main on the main road. Well, I will do what I can next week. The last time I rang the water department in December, the chief engineer there told me to 'wait a month to see if the problem settles.' I said that I knew it would do nothing, but sure, why not. Before he said that, he mentioned that they could jet the main as a last resort or something if the problem persisted. Since back then I didnt know what was the underlying cause, I wanted to leave it until I really knew how to articulate it to them.... I reckon I do now. I think the recurrance of these water fleas pretty much seals the deal anyway!