Combining condensate drains?

Hi,
I have two boilers in the basement, one is a combi, between them I have 6 pipes to route to the drain. 3 relief valves, 2 condensate, and the backflow. The two condensate lines currently run over to floor drain, while the others dump on the floor. I've found that the floor doesn't really slope to the drain so if any of the relief valves pops it just puddles on the floor.

Can I have all 6 dump into one line and run that over to the drain? I think it is OK if I maintain an air gap between the outlet of each unit and the line to the drain but I am not sure.

 

It will be ok the way you described.

 

You could combine some before the drain. You could combine some at the drain.
https://airgap.com/product/ag180-002/https://airgap.com/product/ag180-002/