I have finished major part of the project, still need to fix small things like paint work on the wooden boarder, arbor over waterfall, rails, aquatic plants and fish. here are some pics; Mia, thanks again for the pump and filters, it is working great, lift lot of water. Thank you all for all those tips to make it happen. Here is a link that might be useful: Hot Bath Tub Water Garden

First thing I'd do is read the installation instructions to see what is specified there. If they recommend "X" number if vertical inches and you're less than that, or if you used PEX and they specify "no pex" or you used pex that has a smaller inside diameter than the recommended tubing, then essentially you have an installation issue. 1/2" pex does have a smaller inside diameter than 1/2" copper. For delivering water volume to a faucet it's normally not a problem, but when depending on a specified vertical water column, I guess the smaller diameter of the pex could be an issue. I'd call the manufacturer's tech support line and ask them about remediation. No harm no foul, it's best to run ideas past them before you crack open walls. You installed the shower head lower for the kids. Let's say you have yours 25" above the valve and the manufacturer specifies 30". What you could do is have the pipe come vertically out of the valve, and run it up the wall several inches higher than the shower head, say to 40", or even all the way to the top plate of the wall, then add a couple of 90's (to create and inverted "U") and then run it back down to the shower head. That would take care of the vertical issue while allowing you to still have a lowered shower head. If your pex to the tub spout is constricting flow out of the tub spout, that might need to be changed to a larger size of PEX or to copper. Something with a larger inside diameter. You're on your own well so it's likely excessive water pressure isn't an issue. What's on the "back" side of the wall that the valve and plumbing is installed in? Often times it's easier to cut through the back of the wall to access the plumbing, repair the plumbing, then TEST the plumbing, then patch the hole, than it is to access through the shower side of the wall.

No, it is not a single handle. I thought at first it was residual from the 5 ft hose from the shower system that converts to hand held. After its use, I turn the valve in the actual shower so it will drain from the actual fixture, then after a minute or two, I will turn the converter at the top of the shower where the system is hooked up, to the right, and drain what is left in the hose from the hand held portion. 95% of the time all of the residual water will drain. I don't understand where it is coming from but it will happen 8-12 hours after the shower had been used. Why all of a sudden is beyond me, but it will diminish after about 20 minutes, so it has to be coming from somewhere, as there is no leak that I am aware of and no water is in use when this happens. The water heater is on the other side of the shower wall. I don't believe there is any connection between the two?

If the water in the tub is 32 degrees , I'd say that's your problem right there . I had the same issue . Some tubs will not heat up the water when it's too cold . Meaning ,you need to fill it with "warm" water and then turn it on . Thankfully, when we did our renovation we put a hot AND cold faucets outside . It's a huge help when filling up the tub . i hope this solves your problem .