100 PPD Regulators are mounted on  Heated Manifolds to keep trash and liquid chemical from damaging the Regulators. The plated-copper Flex-Connectors  are run to the gas bottles on a Double Pan Scale for the Automatic Switchover function. These manifolds could use a CROSS fitting instead of the TEE and connect to TWO 150 # bottles to feed up to 70 PPD.

The customer who built this decided to use Unions for the Ejectors because they already had the ball vales installed previously and the Downstream side drained into the contact chamber system.

Note: If there is no Back-Pressure generated by the Downstream piping, problems could occur that would prevent the Ejectors from working, but luckily this was not the case here !

Any System Operation problems can be Diagnosed using the Pressure Gauges located on the water supply lines just beyond the camera range above.

Either or both of the Ejectors can be isolated when unused or removed for service in a clean shop environment, leaving the other equipment  in service.

The Ejectors can be isolated and removed to be serviced. The Regulators would need to have valveing on their gas outlets to isolate them for service as would the Remote Metering Panels.

Spare valves and fittings are always recommended so you can keep your systems running and maintain your redundancy requirements !