The Raypak Digital ASME 406A (B-R406A-EN-C #50, SKU 017374) is a 399,000 BTU natural gas commercial pool and spa heater for installations at elevations up to 2,000 feet where ASME pressure vessel certification is required by code. It replaces SKU 009271 and is the standard (non-Low NOx) ASME model — the right choice for commercial installations outside Low NOx regulated regions.

This model replaces SKU 009271. The current replacement model is SKU 017374 (B-R406A-EN-C #50 ASME).

Key Features

• 399,000 BTU natural gas — ASME-certified for commercial installations; meets ANSI Z21.56 pool heater standard
• Bronze headers — commercial-grade strength required by ASME code; straight-tube design reduces friction and extends heat exchanger longevity
• Copper fin tube heat exchanger with ProTek Shield — integral extruded copper construction; replaceable ProTek module absorbs corrosion to extend service life
• Digital LCD thermostat with on-board diagnostics — microprocessor-controlled; live temp readout and fault codes on the panel
• Remote compatible — connects to most 2-wire and 3-wire pool automation systems; 120/240V input

ASME certification is required by many local codes for commercial pool heaters over 200,000 BTUH. This is the standard (non-Low NOx) model — for Low NOx regulated areas (California, Utah, Texas, etc.), order SKU 017708 instead. Professional installation required to validate warranty.