Replacing 2 of the 3 airconditioning lines with the new Aeroquip teflon steel braided lines. One line was the liquid line from the condensor to the evaporator. I didn't realize there was a filter/checkvalve on one end of that original line. Is this filter/checkvalve important and can be used without. I already threw out the original line but could go to the junkyard or go to ford for another. Just don't know if it will fit on the new steel braided line. Hopefully I can run line without any damage to the a/c system. What do you think? This is on a 93 5.0.