Reply to "AC hose question"

One hose runs at up to 300 psi while the other runs at 50. So pressure-testing probably should be done accordingly. Both are routed pretty close to the right header and cook nicely to a bricklike consistency over time. Trust me- even the low pressure hose will blow at the most inconvenient time- like when you're laying under the compressor adding freon! Did you know that old compressor lube stains your face & hair? Seen it happen....

Replace old hoses; r-134a conversion hoses will fit R-12 systems with adapter fittings. The later hoses have a barrier layer inside and o-rings on the ends, and do help to keep the outrageously expensive R-12 inside longer. Do NOT replace your flair fitting hoses with regular aeroquip; the ptfe inside also leaks freon right through the surface. Aeroquip makes special barrier braided-stainless for bling-fans; I think A/C fittings use a 45 degree flair angle while regular aeroquip fittings are 37 degrees, for even more leak opportunity.