The polycarb came from the local hardware (bunnings) shop. Its a brand called laserlite. Its very tough, lets just the right amount of of light in, but also blocks UV which, with the intense summers nowdays is a must as the equipment seems to get damaged by UV just as much as the other elements (turns everything plastic brittle and colourless). With our set up including electronic pressure gauges for automatic backwash, jandy valves, the intelliflo pump, salt water chlorinator and a FPGA based controller for it all, it was pretty important to protect it. The whole lot is built on a small slab surrounded by aglines/french drains. Even on heavy rainy days, its super dry in there.
http://users.tpg.com.au/srkh//pumpnparts.JPG
Steve
http://users.tpg.com.au/srkh//pumpnparts.JPG
Steve