Introducing the Gecko Gen2 Flow-Through S-Class Replacement Heater, the purpose-built solution for spas and hot tubs that rely on Gecko, Caldera, or Nordic S-Class systems. With a streamlined 15" length and 2-1/4" diameter, this stainless steel heater is designed to slide into existing plumbing setups with minimal fuss while delivering dependable heat when you need it most.
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Dtec-1 pressure detection system: ensures water is flowing before the heater engages, protecting the element, pump, and plumbing from damage and reducing the risk of dry-fire.
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Stainless steel S-Class construction: engineered for durability in wet spa environments, resisting corrosion and standing up to frequent heating cycles.
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4.0 kW at 230V: provides strong, consistent heat for faster warm-up and stable temperatures during multiple-user sessions.
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No aluminum ground bar: a corrosion-minimizing design choice that enhances longevity and reliability over time.
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Complete hardware for easy replacement: includes 1/8" NPT pressure switch, (1) 10-32 x 1/2" mounting stud, 2" tailpieces, split nuts, and gaskets—so you’re ready to install with minimal additional parts.
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Targeted compatibility: specifically designed for Caldera, Nordic, and Gecko S-Class systems that use a 15" x 2-1/4" flow-through heater form factor, Gen2 upgrade
Who should consider this heater? Technicians replacing worn-out flow-through units, spa owners upgrading to the latest Gen2 design for improved reliability, or anyone seeking a robust 230V heating solution that fits standard S-Class configurations.
Use cases and scenarios:
- Replacing a failed heater in Caldera, Nordic, or Gecko S-Class spas without major plumbing changes.
- Upgrading to Gen2 for enhanced protection features and longer service life in 230V systems.
- Installing a high-performance, quick-heat 4 kW unit in a single- or multi-user spa to maintain comfortable temperatures efficiently.
Practical tips for best results:
- Confirm your spa compatibility with a 15" x 2-1/4" flow-through heater and a 230V supply before purchasing.
- During installation, inspect tailpieces and gaskets and replace as needed to ensure a watertight seal.
- Keep the Dtec-1 sensor clear of air pockets and ensure proper flow through the heater to maintain accurate pressure readings.
Choose Gecko Gen2 for a reliable, efficient, and durable flow-through heater designed specifically for S-Class spa systems. Built to endure, perform, and simplify replacement projects, it delivers consistent water temperatures for those relaxing spa nights and family soak sessions.
