Product Overview

The Raypak B-R406A Digital ASME Natural Gas Heater 017402 is a high-capacity pool and spa heater built for powerful heating performance, digital operation, and heavy-duty ASME-rated construction. With a 399,000 BTU natural gas heating capacity, this model is designed for larger commercial pools, spas, facility pools, and residential applications where ASME construction is required.

This heater features a cupro-nickel heat exchanger, providing added resistance in saltwater pools, spas, and applications with more demanding water chemistry. It also includes bronze headers, which offer added strength and durability for heavier-use pool and spa environments.

With digital controls, electronic ignition, ASME construction, natural gas operation, and the included ProTek Shield Module, the Raypak 017402 is built to deliver reliable heating performance and long-term durability in commercial and code-sensitive installations.

Ideal For

The Raypak 017402 heater is ideal for:

• Commercial swimming pools
• Commercial spas and therapy pools
• Large residential pools requiring ASME equipment
• Apartment, HOA, hotel, and facility pools
• Natural gas installations
• Saltwater pool applications
• Applications requiring cupro-nickel durability
• Installations requiring bronze headers
• Replacing older Raypak B-R406A ASME natural gas heaters
• Pool and spa systems requiring high BTU heating performance

Key Features

399K BTU Heating Performance

The Raypak B-R406A provides 399,000 BTU of natural gas heating power, making it a strong choice for larger pool and spa systems that require fast heat-up and reliable temperature maintenance.

ASME-Rated Construction

Built to ASME standards, this heater is designed for commercial, public, and code-sensitive installations where ASME-rated equipment may be required.

Natural Gas Operation

Designed for use with natural gas, making it a practical option for properties with existing natural gas service.

Cupro-Nickel Heat Exchanger

The cupro-nickel exchanger provides enhanced resistance compared with standard copper, especially in saltwater pools, spas, and applications with more aggressive water conditions.

Bronze Headers

Heavy-duty bronze headers provide added strength and durability, making this heater suitable for demanding commercial and residential pool environments.

ProTek Shield Module

The included ProTek Shield Module helps protect key heater components from corrosion and supports longer equipment life.

Digital Control System

The digital control panel allows users to set and monitor pool or spa water temperature easily. Built-in diagnostics also help simplify troubleshooting and service.

Electronic Ignition

Electronic ignition provides reliable startup when there is a call for heat and eliminates the need for a constant standing pilot.

Service-Friendly Raypak Design

Raypak heaters are designed with accessible components and a practical service layout, helping pool professionals perform maintenance and troubleshooting more efficiently.

Benefits

The Raypak 017402 B-R406A gives pool owners, facility managers, and service professionals a strong combination of high BTU output, ASME construction, corrosion resistance, and easy digital operation. Its 399K BTU rating makes it a strong fit for larger commercial pools, spas, and residential systems that require heavy-duty heating performance.

The cupro-nickel heat exchanger helps provide added protection in saltwater or demanding water conditions, while the bronze headers add durability for heavier-use applications. Digital controls make everyday operation simple, and built-in diagnostics help service professionals identify issues more efficiently.

Specifications

Important Installation Notes

This heater should be installed by a licensed pool, gas, or HVAC professional. Proper gas line sizing, electrical wiring, water flow, bonding, ventilation, clearances, and local code compliance are required for safe operation and warranty protection.

Because this is an ASME model, it may be required for certain commercial, public, or code-sensitive pool and spa applications depending on local code. Always confirm project requirements before ordering.

This model is designed for natural gas. It should not be used with propane unless the correct factory-approved propane model is selected.

Customer-Facing Q&A

Q: Is this heater natural gas or propane?
A: This model, Raypak 017402 / B-R406A, is the natural gas version.

Q: How many BTUs is this heater?
A: This model is rated at 399,000 BTU, also commonly referred to as 399K BTU.

Q: What does ASME mean?
A: ASME means the heater is built to a recognized pressure vessel construction standard. ASME heaters are commonly used for commercial, public, or code-sensitive pool and spa installations.

Q: What is the benefit of cupro-nickel?
A: Cupro-nickel provides added resistance against aggressive water conditions compared with standard copper. It is a strong option for saltwater pools, spas, and heavier-use applications.

Q: What is the benefit of bronze headers?
A: Bronze headers provide added strength and durability compared with standard residential header materials, making them suitable for demanding installations.

Q: Does this heater include ProTek Shield?
A: Yes. This model includes the ProTek Shield Module for added corrosion protection.

Q: Does it have digital controls?
A: Yes. The heater includes a digital control system for temperature adjustment, monitoring, and service diagnostics.

Q: Can this heater be used on a saltwater pool?
A: Yes. The cupro-nickel exchanger makes it a strong option for saltwater applications, but proper water chemistry must still be maintained.

Q: Is this heater suitable for commercial pools?
A: Yes. This ASME model is designed for commercial and code-sensitive pool and spa applications, but local code requirements should always be confirmed before installation.

Q: Does this heater require professional installation?
A: Yes. Gas pool heaters must be installed by a qualified professional to ensure proper gas, electrical, venting, water flow, and bonding compliance.