The boiler does what he should. I bought a different security group for about 30 Eur on ebay, so will halt drained by heating the pressure and the water does not flow back. The enclosed part would fell ot build the same service. Because it is small, I wanted to play it safe and I've got just one with which you can also turn. I can heat water only when say Top, looong can take a shower and enough water and is still hot at the end and at level 6 and not to the MAX! I shower about 15 minutes. But best to install an adjustable shower, otherwise too much water and energy is wasted. I quasie My gesammtes water system replaced and have hot water both in the kitchen and in the bathroom. The gas water heater, I no longer use!
