It's been a little while since I updated the progress on this project. I wasn't able to do much last week mainly because of weather, 40's and drizzly, gray, and just nasty for several days.
The last couple of days have been much better and some progress has been made. The outcome has been mixed. The system works very well, and each box can be operated totally independent of the other - supply and return. That's the good news.
I did a full-on wet test today and everything did well except the right box leaks. The good part of this scenario is I can load and plant the left box and get things moving and by manipulating the valves take down and exorcise the right box.
Here's where the "Sky Bogs" are today......
The pond water enters via the small pipe and overflows the open end of the 1 1/2" return and is directed back to the pond. (In this photo the supply line is under the return. Once the gravel/lava rock is installed it'll stay put.)
This is the drain/return system. All of this will be painted, I just couldn't stand it and had to test everything first!
The lower valve hose bib will/does do two things; It will provide pond water to a watering can rather than dipping the can in the pond......much more refined than the "sink the bucket" method
, and provides a siphon point if the boxes need to be emptied.
The garden hose is the supply line, and the black 1 1/4" is the return. Both will be hidden/disguised. They will be buried very shallow (6-8") for a short distance, but will be brought back up by the raised bed on the other side of the walkway. I would prefer to have them accessible along a border and covered with plants. There may be an occasion later to tap into the supply line for another feature in the future.