Better get the CNG cylinders uninstalled from cars,Use bike for daily transport :(, and install it at home gas line(i guess line pressure is less then 1 BAR while cylinders are atleast 100 bar even when not suitable for car use which require 250 bar rating) with such compressor with a pressure switch 20mBar On 50 mBar off, P. guage, Safety valve{10PSI(0.5BAR)} and checkvalve(NoReturn)to run it or invest ur PKR 3000 something on gas cylinder.
The natural gas getting to a person's home is usually at a pressure of between 30 millibar and 50 millibar. The pressure is lowered by the time it reaches the home, as the pressure at the source can be as high as 100 bar. The 30 millibar pressure is reduced to 21 millibar by the domestic gas meter, and this pressure is safe for the gas to be used with cookers and boilers.