diff --git a/ontology/yaml/resources/HVAC/entity_types/ABSTRACT.yaml b/ontology/yaml/resources/HVAC/entity_types/ABSTRACT.yaml
index 128a2a41a..6b4f6f7b4 100644
--- a/ontology/yaml/resources/HVAC/entity_types/ABSTRACT.yaml
+++ b/ontology/yaml/resources/HVAC/entity_types/ABSTRACT.yaml
@@ -8709,6 +8709,9 @@ LHLM:
   guid: "647a4576-b503-43cd-b3b7-e1a9c6856695"
   description: "High and Low Level Monitoring for tanks."
   is_abstract: true
+  opt_uses:
+  - water_high_level_alarm
+  - water_low_level_alarm
   uses:
   - water_high_level_status
   - water_low_level_status
diff --git a/ontology/yaml/resources/fields/telemetry_fields.yaml b/ontology/yaml/resources/fields/telemetry_fields.yaml
index 6acee8357..bf077aeba 100644
--- a/ontology/yaml/resources/fields/telemetry_fields.yaml
+++ b/ontology/yaml/resources/fields/telemetry_fields.yaml
@@ -4028,6 +4028,9 @@ literals:
 - water_high_level_status:
   - ACTIVE
   - INACTIVE
+- water_high_level_alarm:
+  - ACTIVE
+  - INACTIVE
 - water_leak_alarm:
   - ACTIVE
   - INACTIVE
@@ -4050,6 +4053,9 @@ literals:
 - water_low_level_status:
   - ACTIVE
   - INACTIVE
+- water_low_level_alarm:
+  - ACTIVE
+  - INACTIVE
 - water_riser_mode:
   - OFF
   - HEATING