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I have a small 2 loop slab radiant floor located 7ft above my manifold/ heat source system located in the basement.
The loops were pressure tested to/from the manifold(s) holding 60lbs for 2 days.
I was able to fill the system with water- no leaks and limited flow using a Grunfos Alpha2 pump.
I have no pressure and no source of pressure being a closed system.
How has this problem been addressed?
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