The irrigation computer is suitable for taps with G 3/4 and G1 thread sizes, but there is no mention of compatibility with a G 5/8 faucet. It supports taps with 26.5 mm (G 3/4) and 33.3 mm (G1) threads, which are different from G 5/8 thread size. Therefore, it is not suitable for a G 5/8 faucet.