Watkins Pressure switch for heater

This pressure switch is used on certain Watkins heater models found in spas from Watkins, Hot Spring, Caldera, Solana, Tiger River, and Hot Spot.

A pressure switch is a safety device that ensures there is sufficient water flow through the heater to prevent overheating.

This model is now round and is a direct replacement for the previous square version (see photo 3).

Technical specifications
Thread: 9 mm outer diameter
21 cm cable with 2 female connectors and one 3-pin female connector

Part numbers
Hydroquip: 34-73995-K
Watkins: 73995
Caldera: A-000000-09249
Hotspring: SPCD73995