A/C coolant line size

What is the size of the waste line required for a kitchen drain line ? Is it 1 1/2 or 2 inch pipe?

I'm installing a shower drain and I want to run the minimum size vent that I can because of space restrictions, but I want to remain within the code.

From a water meeter with a 3/4 outlet with 60 psi. What size should my line be

I drive a 2004 Chrysler Concorde and there is smoke coming from under the hood. I was told that the coolant was leaking on the engine. What is the possible cost for parts and repair?

Smell of coolant from exhaust. level of coolant rapidly decreased. temp. drops when travelling 50mph+, increases when slowing down/idle. no coolant in oil