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Plumber just getting into hydronics. Installing a Buderus GA124 cast iron boiler, 80,000 btu output. Was wondering if you see any problems with this piping set up. Primary loop and manifolds all in one inch then reduce to 3/4 inch going out up to baseboard zones. There will be one more zone added to this pictured manifold. Is there any problem with the pipe size or design? Thank you for any information.