Help identifying A/C hi pressure and Low pressure fittings for vacuuming system

***knostroke*** · #1 (**permalink**) 06-23-2011, 04:27 AM

This is the first time to do any a/c wok so bear with me. I had to replace the A/c hose. So im going to vacuum the system. There is 2 nipples on the same line and then another on the canister. Why is there 3? and which one is low and which is high?

thanks

**2006PSDSD** · #2 (**permalink**) 06-23-2011, 05:08 AM

LP side should be the larger tube, and HP the smaller. It doesn't matter which access port you use

If I had my truck here, I'd make sure I was right, but that's traditionally correct, as far as the LP and HP lines are concerned

***knostroke*** · #3 (**permalink**) 06-23-2011, 06:07 AM

So from looking at mine there is not a LP acces port on the actual hose/line its in the cannister? Or do I have it backwards?

**2006PSDSD** · #4 (**permalink**) 06-23-2011, 06:21 AM

Yes, the LP (suction side) you will use the port on the canister, and the HP line is the line leaving the compressor and going to the condenser

***knostroke*** · #5 (**permalink**) 06-23-2011, 06:40 AM

thank you for your help

**2006PSDSD** · #6 (**permalink**) 06-23-2011, 06:49 AM

Anytime

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