I also made something similar. Mine is 100% PVC, and also has two valves. One valve goes to the keg QDs, and the other to the main stem (i.e., I can control with the valve how much water is going up into a carboy). Pump was cheap from harbor freight. Finding the PVC fittings was by far the most difficult part...
“While the rest of the species is descended from apes, redheads are descended from cats.” - Mark Twain