Joel -
That happened to my outside shower when I was new to TM'ing, and I'm sorry it happened to you. As you have discovered, opening the four low point drains is necessary, but not sufficient, to fully drain the system. It is also necessary to open all of the faucets in the TM, including the ones in both sinks and the indoor and outdoor showers. Were you able to do this? If you did, the shower faucet should have drained backwards into the bathroom plumbing at floor level, and out the low point drains under the TM. In my TM, at least, the pipes leading to the faucet assembly come directly up to the faucet from the floor level. Did yours have some kind of loop that would prevent draining?
It is also a good idea to remove the shower heads from both hoses, shake the water out of them, and drain both hoses. And turn the water pump on for two or three seconds.
I'm not sure that blowing out the pipes is necessary, but it certainly can't hurt.
Bill
|