As requested (this is for you Diego), this video is a guide to buying and using a nitrogen fill station for use with rear mountain bike shocks. I go over nitrogen in general, parts needed for system and how to use the system.
The reason I don't use the nitrogen fill station in my rear shock service videos is I honestly don't expect people to buy a system like this to service their own shock once a year or two. Air works just as well and it is significantly less expensive than a nitrogen station. Though I will say, filling FOX rear shocks is easier (and safer IMO) using a setup like this over a hand pump and needle. Still, I can't recommend it for the vast majority of people due to the expense.
Now, The setup and method of using the system in this video works for me. It might not be the best solution for a fill station, nor the best overall way to use the system, but for me, I built it with safety as the top priority, and it has worked very well. If others feel there is room for improvement it would be greatly appreciated if you can share your thoughts.
As always, if there are any questions, feel free to ask and I'll get to them as soon as I can
Below are the parts in my setup. Not saying these are the ones you should buy, but it should give you an idea on what to look for. I'll list them in order of assembly. I would buy all the fittings at your local hardware store, home depot, lowe's ace hardware etc, as they will cost less.
40 cubic foot (CF) Trank. 20 should work for most people. find the lowest cost, buy used if you can
Regulator - I see the one I have on Amazon, might cost less at your local gas supply shop
https://www.amazon.com/dp/B00GYGJUQ4?psc=1&ref=ppx_yo2ov_dt_b_product_details
HIgh pressure cable - I see the one I have on Amazon, might cost less at your local gas supply shop
https://www.amazon.com/dp/B00CIRZ0B2?psc=1&ref=ppx_yo2ov_dt_b_product_details
The high pressure cable NEEDS an adapter. 1/4 FLARE male to 1/4 NPT female. the following should work. probably cost less at your local hardware store.
https://www.amazon.com/uxcell-Fitting-Connector-Conditioner-Refrigeration/dp/B08MZ4L7Z6/ref=sr_1_4?crid=1S14F56AAJGFL&keywords=1%2F4+flare+male+to+1%2F4+npt+female&qid=1687012729&sprefix=1%2F4+flare+male+to+1%2F4+npt+female%2Caps%2C137&sr=8-4
Then you need a 1/4 npt male to 1/4 npt male. the following should work, probably cost less at your local hardware store
https://www.amazon.com/KOOTANS-Adapter-Fitting-Nipple-Coupler/dp/B07P5XC7BT
the following is the same high pressure valve I have
https://www.amazon.com/dp/B083FLTJKF?psc=1&ref=ppx_yo2ov_dt_b_product_details
Then you need a full 1/4 NPT "T adapter".probably cost less at your local hardware store
https://www.amazon.com/Anderson-Metals-Fitting-Barstock-Female/dp/B000BQUTBS/ref=asc_df_B000BQUTBS/?tag=hyprod-20&linkCode=df0&hvadid=312128423644&hvpos=&hvnetw=g&hvrand=2747320183782862540&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9016978&hvtargid=pla-598409704724&psc=1
This is the secondary high pressure gauge I have
https://www.amazon.com/dp/B08942H4ZR?psc=1&ref=ppx_yo2ov_dt_b_product_details
Then you need a 1/4 NPT male to 1/8 NPT male adapter.probably cost less at your local hardware store
https://www.amazon.com/MettleAir-Reducer-Reducing-Fitting-Adapter/dp/B00S8ASL5A
Finally the safety needle
part number 802-01-000-KIT
make sure to use plumbers tape for all connections