Laing D5 solar pumps
Ive been using two Laing D5/090B pumps for several years, and they have run trouble-free circulating hot propylene glycol solution in a solar radiant heat floor application. However, the /090 does not move quite enough fluid (even with the check valve removed), so Im back for a /710. My one complaint is that Laing does not seem to distinguish the power consumption of these two pump capacities. One would think the 720 draws more than the 090, but they dont show a difference in the specs.
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