Hi all,
We have 2 water tanks on our property. 1 big concrete one that is fed by and supplies the main house. A second smaller poly sitting approx 1m lower is fed from and supplies our cottage. Now there are a number of problems I need to solve eg. there are less overflows than inlets and the big tank overflows into the little one so in heavy falls it doesn't stand a chance.
Now I tried to create what I though was a simple way to create a buffer of capacity in the little tank by linking a 32mm 'balance pipe' to the big one. As the little one is always full and the big one mostly empty after a very dry 6 months I though I could 'steal' 5000L out of the little one without having to use the cottage pump. The attached drawing shows what I have attempted to do, all the new and existing poly pipe is 32mm.
Now 2 things don't happen as I had envisaged. Firstly I open the ball valve to get the water to balance and very little or nothing appears to transfer, even when I turned off the pumps and left it all night. Secondly when I open this ball valve the main house pump really doesn't like it. It seems to pump water ok but when the pressure switch turns the pump off it sounds like water is gushing back out. It tries to start up again and makes some horrible noises so I don't push my luck and turn it off.
Everyone I have spoken to feels the levels should balance so maybe I'm not talking to people knowledgeable enough.
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