diff --git a/models/valving.py b/models/valving.py
new file mode 100644
index 0000000..e496001
--- /dev/null
+++ b/models/valving.py
@@ -0,0 +1,6 @@
+import numpy as np
+import astropy.units as unit
+from astropy.time import Time
+
+def valving(utc):
+    return False