Gas Tanks no longer use NodeContainer, Gas Canisters no longer use passive gates.

Content.Server/Atmos/EntitySystems/GasTankSystem.cs

@@ -0,0 +1,32 @@
+using Content.Server.Atmos.Components;
+using JetBrains.Annotations;
+using Robust.Shared.GameObjects;
+
+namespace Content.Server.Atmos.EntitySystems
+{
+    [UsedImplicitly]
+    public class GasTankSystem : EntitySystem
+    {
+        private const float TimerDelay = 0.5f;
+        private float _timer = 0f;
+
+        public override void Update(float frameTime)
+        {
+            base.Update(frameTime);
+
+            _timer += frameTime;
+
+            if (_timer < TimerDelay) return;
+            _timer -= TimerDelay;
+
+            var atmosphereSystem = Get<AtmosphereSystem>();
+
+            foreach (var gasTank in EntityManager.ComponentManager.EntityQuery<GasTankComponent>())
+            {
+                atmosphereSystem.React(gasTank.Air, gasTank);
+                gasTank.CheckStatus();
+                gasTank.UpdateUserInterface();
+            }
+        }
+    }
+}