The Raypak Digital 406A (P-R406A-EN-X #50, SKU 014941) is a 399,000 BTU natural gas pool and spa heater for inground residential pools at elevations up to 2,000 feet. It's the cupro-nickel upgrade of the standard copper 009219 — the right choice for saltwater pools, pools with aggressive water chemistry, or high-use applications where the standard copper heat exchanger would degrade faster.

Key Features

• 399,000 BTU natural gas — sized for inground pools up to approximately 40,000 gallons
• Cupro-nickel fin tube heat exchanger — significantly more resistant to corrosion from salt, low pH, and heavy use than standard copper
• ProTek Shield — replaceable corrosion-protection module that extends heat exchanger life
• Digital LCD thermostat with on-board diagnostics — live water temp readout and fault codes displayed on the panel
• Remote compatible — connects to most 2-wire and 3-wire pool automation systems
• Wind-resistant powder-coated cabinet — galvanized metal housing rated for combustible surface installation

If your pool uses a salt chlorine generator, cupro-nickel is the recommended heat exchanger material. The standard copper model (SKU 009219) is better suited for traditionally chlorinated pools.

Rated for 0–2,000 ft elevation only. For installs at 2,000–6,000 ft, a high-altitude configured model is required.