[long story shortened...]
House is 2 floors + attic. Pipes go from CW tank in attic, down
~~ 8 ft to HWC on floor 1, back up to attic, along ~~ 10 ft and
down to bathroom also floor 1 . There they run horiz. for about
6 ft, then 2-3 ft up to taps. Recently I had to drain, turned
supply back on, no water. So I cut the pipe at the high point
between HWC and bathroom, inserted a tee and a vent pipe.
1. If I fix the tee roughly level with base of CW tank, then
the airlock doesnt clear, so no hot water.
If I fix it about a foot higher, then the airlock does clear, but
2. if you run the taps fast, the pressure drops so much that air
gets sucked in through the vent pipe. and
3. if the CW tank gets half empty, the water cannot climb up to
the tee and so you only get half a bath.
4. On the way from CW tank to bath, it goes through 4 service
valves. Would you expect a better flow if you removed some of
Please any advice? Mark