After several problems with the air condition guys and fixing a variety of small problems myself, I start to refill Aircons.

I bought the set with the hoses and gauges and the R22 gas.

My questions:

Of course there are some micro leaks somewhere, else I wouldn't need to refill them every couple of months. How to detect them (beside the valves that are by purpose not fully screwed in, I found that already)?

The gauge tells on the low pressure side R22: -30, -20, -10, 0, +10, +20, +30.

Obvious if an aircon that almost doesn't cool anymore it is at -30 or -20. If I fill it slightly below 0 it works perfect again.

Something more I should know about it, or is that all?

Use soapy water to find gas leaks Don't know if this would work for aircon.

Use soapy water to find gas leaks Don't know if this would work for aircon.

jup will work.....