What's wrong with the fire extinguisher pointer not in the green area?
If it is in the red range, it is tantamount to scrapping, because the pressure gone, spray enough distance.
If it is in the Yellow range, it depends on what season it is The weather is hot in summer and the needle is not very important in the Yellow area. Because of expansion and contraction, the pressure increases a little normal. If winter and cool weather are yellow, you should be careful! The pressure is high, so be careful when the weather is hot.
