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Negative or positive pump head, Surrey Flange and more > Advice please
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<blockquote data-quote="kme" data-source="post: 190877" data-attributes="member: 113"><p>As plumber says; header tank sizing can be a big problem; especially with twin impeller pumps of 3 bar and above...........dont forget that you`re effectively drawing BOTH hot &amp; cold from the header tank; if it empties you`ll create airlocks.</p><p></p><p>I have, in the past, used an electromagnet from a doorbell to trigger the reed switch on the pump - your other option could be to raise the header tank as high as possible in the loft?????</p><p></p><p>KME</p></blockquote><p></p>
[QUOTE="kme, post: 190877, member: 113"] As plumber says; header tank sizing can be a big problem; especially with twin impeller pumps of 3 bar and above...........dont forget that you`re effectively drawing BOTH hot & cold from the header tank; if it empties you`ll create airlocks. I have, in the past, used an electromagnet from a doorbell to trigger the reed switch on the pump - your other option could be to raise the header tank as high as possible in the loft????? KME [/QUOTE]
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Negative or positive pump head, Surrey Flange and more > Advice please
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