06-26-2007, 08:45 AM
Regarding
http://ersson.sustainabilitylane.com/rainwatr.htm
It was nice to see what this person went through with two attempts to use different roofwashers, which to me is basically a first flush with some gizmos. The first roofwasher mentioned at this URL is the same one as in the Australian URL
http://www.saferain.com.au/harvesting.htm
And, in case you didn't read the accounts at the first URL, neither roofwasher functioned well in Oregon.
Regarding drilling holes in the end of your first flush pipe, you don't necessarily need to do that. Not having the holes may require a bit more close monitoring, but I'm not sure what the trade off is if there is water constantly draining the diverted water. In a light rain, it might drain all collected water. If the holes are too small, they could easily plug with debris and they would function like a pipe without the holes. In this case, they might provide a visual clue when checking your first flush during a rain: water not flowing out = debris in pipe needing clearing.
Royall, with the laundry bag/filter at the end of the first flush pipe, does a lot more water not get into your tank, especially during light rains, than without the bag/filter? One good side benefit is that if it drains well, there is less standing water in the diverter pipe (and the collection pipe, depending on your setup).
Edited by - Les C on 06/26/2007 12:50:10
http://ersson.sustainabilitylane.com/rainwatr.htm
It was nice to see what this person went through with two attempts to use different roofwashers, which to me is basically a first flush with some gizmos. The first roofwasher mentioned at this URL is the same one as in the Australian URL
http://www.saferain.com.au/harvesting.htm
And, in case you didn't read the accounts at the first URL, neither roofwasher functioned well in Oregon.
Regarding drilling holes in the end of your first flush pipe, you don't necessarily need to do that. Not having the holes may require a bit more close monitoring, but I'm not sure what the trade off is if there is water constantly draining the diverted water. In a light rain, it might drain all collected water. If the holes are too small, they could easily plug with debris and they would function like a pipe without the holes. In this case, they might provide a visual clue when checking your first flush during a rain: water not flowing out = debris in pipe needing clearing.
Royall, with the laundry bag/filter at the end of the first flush pipe, does a lot more water not get into your tank, especially during light rains, than without the bag/filter? One good side benefit is that if it drains well, there is less standing water in the diverter pipe (and the collection pipe, depending on your setup).
Edited by - Les C on 06/26/2007 12:50:10