diff --git a/api/s1_title.py b/api/s1_title.py
index f49b889..4a74810 100644
--- a/api/s1_title.py
+++ b/api/s1_title.py
@@ -33,11 +33,11 @@ class InpTitle:
 
 
 def inp_in_title(section: list[str]) -> ChangeSet:
-    title = InpTitle(section)
-    cs = ChangeSet({'operation' : API_ADD, 'type': 'title', 'value' : title.value})
+    obj = InpTitle(section)
+    cs = ChangeSet({'operation' : API_ADD, 'type': 'title', 'value' : obj.value})
     return cs
 
 
 def inp_out_title(name: str) -> list[str]:
-    title = str(get_title(name)['value'])
-    return title.split('\n')
+    obj = str(get_title(name)['value'])
+    return obj.split('\n')
diff --git a/api/s2_junctions.py b/api/s2_junctions.py
index 88ff1a0..7607263 100644
--- a/api/s2_junctions.py
+++ b/api/s2_junctions.py
@@ -138,19 +138,19 @@ class InpJunction:
 def inp_in_junction(section: list[str]) -> ChangeSet:
     cs = ChangeSet()
     for s in section:
-        junction = InpJunction(s)
-        cs.append({'operation': API_ADD, 'type': 'junction', 'id': junction.id, 'elevation': junction.elevation, 'demand': junction.demand, 'pattern': junction.pattern})
+        obj = InpJunction(s)
+        cs.append({'operation': API_ADD, 'type': 'junction', 'id': obj.id, 'elevation': obj.elevation, 'demand': obj.demand, 'pattern': obj.pattern})
     return cs
 
 
 def inp_out_junction(name: str) -> list[str]:
     lines = []
-    junctions = read_all(name, 'select * from junctions')
-    for j in junctions:
-        id = j['id']
-        elev = j['elevation']
-        demand = j['demand'] if j['demand'] != None else ''
-        pattern = j['pattern'] if j['pattern'] != None else ''
+    objs = read_all(name, 'select * from junctions')
+    for obj in objs:
+        id = obj['id']
+        elev = obj['elevation']
+        demand = obj['demand'] if obj['demand'] != None else ''
+        pattern = obj['pattern'] if obj['pattern'] != None else ''
         desc = ';'
         lines.append(f'{id} {elev} {demand} {pattern} {desc}')
     return lines
diff --git a/api/s3_reservoirs.py b/api/s3_reservoirs.py
index 541af9d..821b57a 100644
--- a/api/s3_reservoirs.py
+++ b/api/s3_reservoirs.py
@@ -114,3 +114,37 @@ def delete_reservoir_cache(name: str, cs: ChangeSet) -> SqlChangeSet:
 
 def delete_reservoir(name: str, cs: ChangeSet) -> ChangeSet:
     return execute_command(name, delete_reservoir_cache(name, cs))
+
+
+class InpReservoir:
+    def __init__(self, line: str) -> None:
+        tokens = line.split()
+
+        num = len(tokens)
+        has_desc = tokens[-1].startswith(';')
+        num_without_desc = (num - 1) if has_desc else num
+
+        self.id = str(tokens[0])
+        self.head = float(tokens[1])
+        self.pattern = float(tokens[2]) if num_without_desc >= 3 else None
+        self.desc = str(tokens[-1]) if has_desc else None
+
+
+def inp_in_reservoir(section: list[str]) -> ChangeSet:
+    cs = ChangeSet()
+    for s in section:
+        obj = InpReservoir(s)
+        cs.append({'operation': API_ADD, 'type': 'reservoir', 'id': obj.id, 'head': obj.head, 'pattern': obj.pattern})
+    return cs
+
+
+def inp_out_junction(name: str) -> list[str]:
+    lines = []
+    objs = read_all(name, 'select * from junctions')
+    for obj in objs:
+        id = obj['id']
+        head = obj['head']
+        pattern = obj['pattern'] if obj['pattern'] != None else ''
+        desc = ';'
+        lines.append(f'{id} {head} {pattern} {desc}')
+    return lines