Beanie
0
Looks great so far and I am anxious to see the finished product!! Thanks for sharing all the great pictures!! 
cobra46 said:Pool plumbing is typically pressurized with water pressure using a garden hose typically in the 45-60 psi range. Your 21 psi sounds a bit low. Have you been watching the pressure since it was pumped up? Did it start at a higher number?
You say that the planter drains were inadvertantly hooked up to something. Do you know what? Waterfall line? In theory, no, the caps should remain water tight, however, it's best to minimize the amount of plumbing and connections that can fail down the road. I would have them cap the 'other' end of these lines....not the planter end. It would also eliminate a non circulating volume of water than can grow some nasty stuff.