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<div class="bbWrapper">Constant pressure doesn't work for plumbing with variable flow.<br />
Basic fluid mechanics. <br />
<br />
Constant pressure means that flow reduces as area (valves close) reduce. It can't cope with system loss and differential.<br />
<br />
This is why it's used primarily for ufh.<br />
<br />
PP whilst not perfect is actually designed for head loss found in typical CE systems.<br />
<br />
It's not perfect but nothing is.<br />
<br />
Use PP.<br />
Or CS.<br />
<br />
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