Browse Forums Building A New House 1 Jul 05, 2009 1:53 pm 'A bottle of wine contains more philosophy than all the books in the world.' Louis Pasteur Vegie garden: viewtopic.php?f=19&t=27637&start=0 My Backyard Adventure Re: Water tank pump - what do I need? 2Jul 05, 2009 6:19 pm Where you are coming from is where you are going to... Re: Water tank pump - what do I need? 4Jul 05, 2009 6:28 pm 'A bottle of wine contains more philosophy than all the books in the world.' Louis Pasteur Vegie garden: viewtopic.php?f=19&t=27637&start=0 My Backyard Adventure Re: Water tank pump - what do I need? 8Jul 05, 2009 9:05 pm We have the Davey "Rainbank" which fits in a box on the wall near the tank, it's the same size as an electricity meter box. The pump is submerged in the tank. It works well, very quiet, good pressure. We've only been using it for a week, but no teething problems so far. I see in your main building thread that you already have a "green" pipe for your cisterns to connect to a tank - I assume the plumber has just connected the green pipe to mains water through a "loop" which will later be connected to the tank controller. That's what they did at our place before the tank and Rainbank were installed. A "first flush" diverter uses a floating valve to redirect the first several litres of storm water away from your tank into a length of pipe with an auto or manual drain valve on the bottom. The first few litres of storm water contain dust, bird poo, industrial fallout etc that accumulates on your roof during a dry period. Some friends who live in a rural area with only tank water once found a small dead animal in their first flush diverter. When the diverter fills up, the storm water starts flowing into your tank. I was disappointed that we don't have a "first flush" diverter on our rain inlet pipe, but the manual says there is a first flush filter in the top of the tank. This doesn't divert "roof dust", just filters it - we'll have to wait and see if it's any good. Perhaps the theory is that it doesn't matter if the first flush gunk is in contact with the main body of water in the tank, since all the accessible outlets are marked "do not drink". You could get extra plumbing to manually bypass the tank for the toilet cisterns, but you'd need to do it now, retrofit would be a challenge. And it might be pointless given the comment by bam... bam I was speaking to someone yesterday who said he heard that once the tank is connected to the house it then forms part of the water supply, meaning it faces the same restrictions as your normal water supply i.e. you cant use it for the garden any more... Can anyone confirm? Built the C£arend0n Cambridge: Moved in. Happy campers. Here's our story on HomeOne I might be old, but I have no trouble finishing my... er... 18 90421 From what I know about water tanks (I've been working with a client on them for a few years now) is this - The concrete can last a lifetime if they don't crack for some… 2 10619 If you can calculate the reasonable charged head from let's say 100mm below the gutter to the top of where the vertical riser's horizontal discharge pipe will be, that… 11 17524 |