u can run the comp straight to the batt it wont hurt them at all done it plenty of times and as far as your valves just run the wires to the batt that u are using on the comp it should work fine
holcombe347
+1y
yeah everything worked out fine, i hooked my battery up to my frame and then to the relay so both compressors kicked on...i filled my tank up a little bit then put the air in my bags...all seems to be holding fine so thats good...if i have any leaks ill find out tomorrow. also, since i had some air in the tank i tried out my train horn i bought....that fucker is LOUD let me tell you...i only ran like half the psi i normally run and it hurt my ears i can only imagine what it will be like at full psi.