Bama Rambler said:With a 3-way you would be able to have 100% of either, both or a percentage of one or the other. To have 100% of both lines you just turn the gate completely to the back side of the valve (handle in line with the middle port).
I don't recommend a check valve except in special situations (i.e. solar).
Ahh...see that, i learn something new everyday (well almost everyday) so a check valve only when I decide to go with solar in the future ....any best practices for the tee's I will need to install and cap off for the supply/return for the solar for now, this way I can add the solar set up easily later down the road?