OK, lets share some things i did earlier this summer.
there has been so many posts lately on the 4-way systems - inflation and deflation of 4 tires simultaneously - and i boarded the band wagon too, earlier this year and bought the first module from Pressure Perfect -
Rugged Connect
Word of advice (Never buy the first prototypes !!)
So i have the ARB-twin cylinder with tank portable compressor and i thought of a portable 4-way air system for my rig. the module came with a basic wiring diagram. so i went ahead to put them together. I was in for a long summer testing !
Firstly the provided manual didn't mention using any air-tanks or whether it can handle the high-pressures from such air-tanks. so when we coupled it - the module just didn't work and kept giving error - check air connections. i started to correspond with the PressurePerfect guys and through their UAE agent , RAMY4x4 (great company) - they promised to send me me an additional air-solenoid to be used with the air-tank. that came in for free , so that was nice of RAMY4x4. so we attached the air-solenoid between the tank and the module - module acts as the outlet and inlet from the tires and in theory should shut of the supply from air-tank when tires have reached the desired pressure.
the problem was - the module wasn't even opening - and continuously gives error - check air connection.
we decided to pressure-rate the solenoids - the silvery one attached to the module and the additional one that came afterwards. Unfortunately both were low rated and couldn't handle the pressure from the air tank. so decided to strip them both out and use the ARB solenoids used for Airlocker ! thats a small beast rated unto 150psi.
Wired everything up with the high-pressure hoses and tried to make it as clean and snuggly fit in the ARB box. initial tests were promising. the module started to work and we started with testing of inflating 1-tire. it was quick and neat. then we tried out 2-tires. its worked fine and finally i used a 3-way coupler to inflate 3 tires.
After testing through the summer and this season beginning - i upgraded to 4-tire inflation using a 4-way coupler and it takes an average of 7mins to fill 4 tires from 13psi to 33psi !!
Now the pressure perfect guys have a new shaped module - don't know if its any better and they compensated for air-pressure tanks ! but Ramy4x4 (
Ramy Automotive | ramyautomotive.com )guys in UAE can definitely install a complete system on your rig !
Some pictures below in sequence of testing and deployment !
! 
