Leak in the system?

[barleymiller]

The bags on my system leak down after about 2 days sitting. I have checked for leaks (spraying soapy water on all fittings) and have found none. Is this normal? I have talked with diffrent people who say this should not happen. It is an older system but has never been out of the garage yet.

[britt@ridetech.com]

This is not normal. The system should be a closed system meaning you lose no air.
I'd bet it's a leak between a line and fitting (most common problem is the line is not cut clean and square and does not seal in the fitting).

Here's a simple way to track it down further: What leaks down? One air spring, or all 4?
If it's one air spring: The leak will be located between the valve and the offending air spring.
If it's all 4 air springs: The leak will be located between the compressor/tank/valves.

The air pressure from the tank helps keep the valves closed. Should the pressure in the tank drop below the pressure in the air spring the air will leak from the air springs back through the valves into the tank. There is a spring in the valves that help keep the valves closed, so you'll normally see a 50psi pressure differential before the system leaks backwards (so if you have 100psi in the air springs they will not leak backward until the tank is below 50psi.)