Product Overview

The Raypak B-R406A-EN-C #50 Digital ASME Natural Gas Heater (017374) is a heavy-duty commercial-grade pool and spa heater designed for maximum durability and performance. Delivering 399,000 BTU, this ASME-rated unit is built with a copper heat exchanger, 2" bronze headers, and an integrated ProTek Shield Module for superior corrosion protection. Engineered to meet commercial safety and pressure standards, this heater ensures reliable and efficient operation in demanding environments while offering easy digital temperature control and dependable atmospheric combustion.

Ideal For

• Commercial pools and spas requiring ASME-certified equipment

• Large residential pools needing high-output heating

• Facilities with strict safety and durability requirements

• Chlorine-based pool systems (copper exchanger is ideal)

• Installations exposed to wind or varying outdoor weather

• Long-term heavy-duty use with minimal maintenance

Customer Q&A

What makes this ASME-rated heater different?

ASME certification ensures the unit meets commercial safety and pressure vessel standards, making it suitable for commercial pools and spas.

Is this heater good for saltwater pools?

The copper heat exchanger is not recommended for saltwater unless a sacrificial anode is used. Cupro-nickel models are better suited for saltwater.

How much heating power does it provide?

With 399K BTU, this heater provides rapid, robust heat-up for large pools and high-demand commercial environments.

What are the benefits of bronze headers?

Bronze headers offer excellent durability, corrosion resistance, and long-term reliability, especially in commercial conditions.

Does the ProTek Shield Module help with durability?

Yes — ProTek Shield adds internal corrosion protection, extending the heater’s life under heavy use.

Should a professional install this heater?

Yes. ASME heaters require installation by a licensed professional due to gas, electrical, and regulatory requirements.