At what level would you set the water line on a F&E tank. So it doesn't expand above the overflow level. Thanks
Waterline header tank
- Thread starter XanderHarris
- Start date
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It all really depends on system size/volume, the size of the cistern taking that the system is nice and clean and restriction free. As an open vent system runs it breathes into the cistern and the water level can fall, rise and then fall again, so the trick is have enough water so it sits in the middle. On a typical 4Gal cistern they seem to be happy around half way which normally equates to around ~100mm.
It's discussed in this thread https://www.diynot.com/diy/threads/new-boiler-nightmare.633792/
So like half way between the base and the overflow level set the water height at this level?
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As suggested, it all depends on the cistern size really but a good rule of thumb is 100mm if it's a regular 4Gal cistern
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