06-22-2007, 05:07 AM
Stan, I don't know which location is better for the first flush. I've only seen them next to the tank, but that's only at my house and a picture in the Macomber Catchment book. It's useful to have it drain into a low area that can handle that volume of water, which probably isn't huge but might be a consideration for where you put it. Also, if you leave it open when you wash off your roof, the drain area should be able to handle that amount of water. Small lava tubes are great for this. 
I don't know what length of tube is recommended or if there's much calculation done. We have about 10' of it and our roof covers about 1500 sf of living area with gutters arranged in a simple rectangle. The tank is about 35' from the house, and our collection pipe is 4" dia. (the first flush pipe is 3" dia.). There might be some useful numbers for doing the math. Leaf load might also be a factor. We only have one Koa tree that drops leaves on one side.
Sorry, I don't know where you can get a swimming pool vacuum. How about Paradise Pools or another swimming pool supply company? Can you be sure to post what you find out about using one with your catchment tank?
Edited by - Les C on 06/22/2007 09:09:54
I don't know what length of tube is recommended or if there's much calculation done. We have about 10' of it and our roof covers about 1500 sf of living area with gutters arranged in a simple rectangle. The tank is about 35' from the house, and our collection pipe is 4" dia. (the first flush pipe is 3" dia.). There might be some useful numbers for doing the math. Leaf load might also be a factor. We only have one Koa tree that drops leaves on one side.
Sorry, I don't know where you can get a swimming pool vacuum. How about Paradise Pools or another swimming pool supply company? Can you be sure to post what you find out about using one with your catchment tank?
Edited by - Les C on 06/22/2007 09:09:54