[rheavn]

Look in basement compartment R-1.  You may or may not have a 3 gallon tank with a petcock to drain the water.  You probably do as you have the air operated genset release.

Look on the front wall of the wheel well on the right side--another 3 gallon tank with petcock.

Look on the rear wall of the left wheel well and you will see the air dryer with the desiccant filter on top.

Now you have to look under the coach:

Front:  2 large round black air tanks with petcocks to drain water--these are for your brake system.  Two crossmember tanks which should have  petcocks.  If they don't you will have to remove the plugs and put in petcocks.  The first crossmember tank is located just behind your genset.  The other is located just to the rear and above your front ride height control valve.  The two crossmember tanks are for your front leveling system and front air ride.

Rear:  1 large black air tank with a drain--this is for your rear brakes.  Then there are 3 crossmember air tanks.  The forward most one is above the transmission cooler.  The second one is between the drive and tag axles.  These two are ping tanks for your drive axle leveling and air ride.  The third crossmember air tank is located above the transmission.  This air tank is two tanks in one and services your tag axle leveling and air ride.  There should be a petcock on the bottom on the left & right side of the transmission.  I had to remove a plug & install a petcock on the right side as Newell had only put one on the left side.

All of the water drains are located on the bottom of the tanks.

An alternative to petcocks is to remove them & install lanyard drains for easier draining.

Now for my opinion.  I drain all air tanks 3 times a year when I lube the chassis.  I advise draining them at least twice a year.

Shamu Do you have a name??????????