you will need brass 13mm brass hexagonal bar of around 3 inch length ,,,,,, you can get it from CT sadar road rwp ,,,,,,, they will sell you by weight and length of at least 6 inch,,,,, i think mine cost not more then 300 Rs ,,,,,half of that bar still left with me and will be used for any other project ,,,,,,,next you will need a high pressure no return valve ,,,,,,, buy it from any CNG workshop ,,,,,, you will not find brand new,,,,,,,and used one will be leak ,,,,,,, you can fix it in 10 Rs ,,,,,, open it up and replace the O ring ,,,,, you can buy O ring from "sadar ture wala bazar" shop name "longman",,,,,,,,,,, take an old glowplug with you so that machinist can measure the threads,,,,,,,,also the face of no return valve must be machined so that you can fit a dial gauge pipe on it ,,,,, for that buy hose coupler in 20 Rs from any AC parts shop ,,,,, that coupler will be later used with gauge adopter ,,,,,,i am attaching a pic of that coupler ,,,,,,,,, next buy gauge at least of 500 psi ,,,,,,,, i think i buy that in 800 Rs ,,,,,,,,you can get it from same shop "longman",,,,,,,,, and may be you can use the remaining 3 inch piece of 13mm brass hexagonal bar to make a adopter which can fit the pressure gauge on one side and the hose coupler on other side ,,,,, i am attaching a pic of this finished pressure gauge adopter for reference ,,,,,,,,,i collected all that parts and a shop infront of bahia town phase 4 RWP GT road side ,,,,,,, i can guide you shop if needed ,,,,,,, and a guy there can help you in making all that,,,,,,, just show him pic of these parts and he will recognize what he make months before ,,,,,,,,
