Also, 'hand-tight' is more than sufficient (in most cases) using compression fittings (not brass but rubber/silicone/Viton, etc). After all, you are dealing wit

Also, 'hand-tight' is more than sufficient (in most cases) using compression fittings (not brass but rubber/silicone/Viton, etc). After all, you are dealing with relatively low pressure, which a strong grip exceeds, while a wrench too tight can easily foul the soft seal. Edit for clarity.