How much Nettogaz GC1 should I use?

In general, you can estimate the quantity of Nettogaz GC1 necessary as two or three times the amount in the refrigerant fluid (dependent on the structure of the circuit).
To evaluate the quantity of the product to be used, you can estimate the approximate quantity of GC1 contained in 1 linear metre

v ¼' : approx. 20 g

v 3/8' : approx. 60 g

v 1/2' : approx. 120 g

v 5/8 : approx. 200 g

v ¾' : approx. 300 g

v l7/8' : approx. 420 g

v 1"1/8 : approx. 710 g

v 1"3/8 : approx. 1070 g