I tried to drain the water from the air tanks on our RV and I couldn’t find the drain valves. No valves to turn and no lanyards to pull. On the tanks, where drain valves should be, are some sort of gizmo with an electrical connection. Could they be some type of electric drain valves? If so, how do you operate them, or are they automatic?

Look a little closer. My lanyards were ty-wrapped to my frame and I had to cut the ty-wraps and stretch them out through the frame. That's probably how mine left freightliner and neither Winnebago or General RV took the time to do a very good PDI.

chuckftboy wrote:Look a little closer. My lanyards were ty-wrapped to my frame and I had to cut the ty-wraps and stretch them out through the frame. That's probably how mine left freightliner and neither Winnebago or General RV took the time to do a very good PDI.I layed right under the tanks and stared at them. There are no lanyards and no drain valves to open.

google 12 volt air dump valves and you will probably find the one you are looking at on your tanks

I am assuming you have a HWH auto level system. If so it dumps the air before it starts to level. Quick way to see is store the level and build pressure and then have someone outside and level the system. Air should be dump if not then the level system should not work.

Cindy and Steve wrote:chuckftboy wrote:Look a little closer. My lanyards were ty-wrapped to my frame and I had to cut the ty-wraps and stretch them out through the frame. That's probably how mine left freightliner and neither Winnebago or General RV took the time to do a very good PDI.I layed right under the tanks and stared at them. There are no lanyards and no drain valves to open.Does it have one or two wires coming out of it.

Automatic air tank drain valves | Good Sam Community

24 Replies

MountainAir05
Explorer II
Oct 24, 2021
I am assuming you have a HWH auto level system. If so it dumps the air before it starts to level. Quick way to see is store the level and build pressure and then have someone outside and level the system. Air should be dump if not then the level system should not work.
donkeydew
Explorer
Oct 24, 2021
google 12 volt air dump valves and you will probably find the one you are looking at on your tanks
Cindy_and_Steve
Explorer
Oct 24, 2021
chuckftboy wrote:
Look a little closer. My lanyards were ty-wrapped to my frame and I had to cut the ty-wraps and stretch them out through the frame. That's probably how mine left freightliner and neither Winnebago or General RV took the time to do a very good PDI.

I layed right under the tanks and stared at them. There are no lanyards and no drain valves to open.
chuckftboy
Explorer
Oct 24, 2021
Look a little closer. My lanyards were ty-wrapped to my frame and I had to cut the ty-wraps and stretch them out through the frame. That's probably how mine left freightliner and neither Winnebago or General RV took the time to do a very good PDI.

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Automatic air tank drain valves

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