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A cistern could be fed from the bottom as long as there is a length of pipe going up (to the highest level of water) then back down. Or using a valve/backflow p
by askvictor 9y ago
A cistern could be fed from the bottom as long as there is a length of pipe going up (to the highest level of water) then back down. Or using a valve/backflow preventer.
- Doxin 9y agoA length of pipe like that wouldn't prevent the supply sucking back water though. So that doesn't solve the whole contamination issue.
- Neil44 9y agoYes the pipe would need to rise from the cistern up to higher than the level of the resevoir, which would not always be practical. The resevoir would not then be able to fill the cistern over that loop :)
- askvictor 9y agoRight you are; I hadn't considered that if the pipe is always full of water then gravity doesn't matter (as much)