said by leibold:Do you mean corrugated or perforated pipe ?
Basically what I'm trying to understand is whether you want all of the water that is coming down from the gutter to exit at the 10" vertical spot or is the intend for much/most of the water to drain into the soil along the 45ft horizontal run (the 10" riser only to provide an escape for excess water).
I mean corrugated, non-perforated pipe. I want the water to go down the downspout and exit at the end of the corrugated pipe run. Freezing weather is not an issue; the pipe will be run in the flower bed and barely underground so if it gets clogged after a few years I can easily disconnect it from the house, pull it out of the inch or so it will be underground, flush it out, or replace it if necessary. it will be going slightly uphill for the 45' but only about 10". Ultimately I think this is a question about water pressure and how the down+pipe will perform on heavy flow days (and will it drain properly)?
Thanks.