Charging pumps [RE-wrenches]

[Brian Vick]

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Wrenches,

What pumps or other techniques are you using for the initial system fill for 
closed loop solar hot water? We are currently using a Teel 1/2 hp 
centrifugal utility pump and we have to turn it on and off repeatedly 
because the flow drops off after a few seconds even when there is no 
pressure in the loop. It takes a long time to get the air out of a system 
this way. Not to mention it's frustrating. Would a positive displacement 
pump solve this?

Thank you,

BRIAN VICK
Whidbey Sun & Wind
Renewable Energy Systems
360-678-7131
brian at whidbeysunwind.com
987 Wanamaker Rd
Coupeville, WA. 98239 

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