Height control valves

[David Brady]

Folks

I'd like to upgrade my coach to Ridewell's Extreme Air
height control valves. The Ridewell valves come in the
following 3 configurations:

1) No Dump: self explanatory
2) Pressure Dump: pilot pressure (65psi) is required to
exhaust air,
3) Zero Pressure Dump: removing pilot pressure exhausts
air.

Anyone know what the LXi would use? I'm not at the coach
so I can't look for myself, but I'd guess number 3.

Thanks,
David Brady
'02 LXi, NC