The Raypak 017402 (B-R406A-EN-X) is a 406,000 BTU natural gas commercial pool and spa heater built specifically for installations that require ASME certification. It's the right call for public pools, condos, apartments, HOA facilities, and any application where local or state code demands pressure vessel compliance. The cupronickel heat exchanger and bronze headers make it the top choice for saltwater pools or environments with aggressive water chemistry.

Rated for elevations 0–2,000 ft. only. A separate high-altitude model is required for installations above 2,000 ft.

Key Features

• 406,000 BTU natural gas input — electronic ignition, factory plumbed and test-fired before shipping
• ASME certified with bronze headers — meets commercial pressure vessel code for public and multi-unit installations; each heat exchanger individually inspected by a state official
• Cupronickel fin tube heat exchanger — resists salt water, low pH, and heavy use where standard copper falls short
• ProTek Shield module included — sacrificial protection for the heat exchanger; replaceable to extend heater life
• Unitherm Governor + automatic bypass — prevents condensation and scale buildup; handles flow rates up to 125 GPM without modification

If your facility runs saltwater sanitation or deals with chemistry swings, the cupronickel exchanger on the 017402 handles the corrosive load that would shorten a standard copper unit's life significantly.

Professional installation by a licensed contractor is required to validate the Raypak warranty. Check local codes and permit requirements before purchase — some jurisdictions require additional inspections for ASME-certified equipment.