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menaus2 · 06-15-12, 09:52 AM

uggh decisions, decisions. I'm looking at the Grundfos 15-58, but all the ones I can find have an integrated check valve. I'm thinking this would be a problem, because you want the vertical section of pipe inside the collector to be able to backflow through the pump to prevent the water that section from freezing. Anyone have experience with this issue?

(edit): Just figured out the check valve is removable (duh!) Anyways, I like the pricepoint and flowrate flexibility. I figure 2 of these should do the job nicely.

06-15-12, 09:52 AM	#46
menaus2 Apprentice EcoRenovator Join Date: Feb 2011 Location: Driftless Region, North America, Earth, Solar System, Orion Arm, Milky Way Galaxy,Virgo Supercluster Posts: 116 Thanks: 13 Thanked 35 Times in 25 Posts	uggh decisions, decisions. I'm looking at the Grundfos 15-58, but all the ones I can find have an integrated check valve. I'm thinking this would be a problem, because you want the vertical section of pipe inside the collector to be able to backflow through the pump to prevent the water that section from freezing. Anyone have experience with this issue? (edit): Just figured out the check valve is removable (duh!) Anyways, I like the pricepoint and flowrate flexibility. I figure 2 of these should do the job nicely. Last edited by menaus2; 06-15-12 at 10:06 AM..