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.
- 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
- if you run the taps fast, the pressure drops so much that air gets sucked in through the vent pipe. and
- if the CW tank gets half empty, the water cannot climb up to the tee and so you only get half a bath.
- 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 these?
Please any advice? Mark