ETH4000 Dr wellness Spa and Hot Tub heater works with Laguna Bay Energy Saver heater --- Replacement is this ETH3000

ETH4000 Dr wellness Spa and Hot tub heater works with Laguna Bay Energy Saver heater ---  replaced by below 

Replacement is this ETH3000  

• 220-240 Vac Output
• 4kw Rating
• Titanium Corrosion Free Element
• Long Life Flow Panel
• Sure Connect System
• Illuminated Operation Sensor
• Superior Heat Elevation System
• Anti-Overheat Sensors