Hello I have to redo my plumbing . I spoke to a plumber he told me to run 1" supply and return for my hydronic and 1" to my radiant manifold.my question is since I would rather not solder because I'm not so good at it I used the sharkbite connectors for other things they work wonderful, but the inside diameter of a 1" fitting is 3/4" will this affect my flow?

I wouldn't worry about it, the restriction in flow in a low pressure hydronic system will be negligible.

Thanks for the help this 1" supply line feeds 2 zones of hydronic, a radiant manifold with 7 zones, and a indirect fired storage tank for domestic will they still work