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Product Overview

The Raypak B-R406A Digital ASME Natural Gas Heater 017374 is a high-capacity pool and spa heater designed for dependable heating performance, digital operation, and heavy-duty ASME-rated construction. With a 399,000 BTU natural gas heating capacity, this model is well suited for larger commercial pools, spas, and residential applications where ASME construction is required.

This heater features bronze headers, providing added durability for demanding pool and spa environments. The included ProTek Shield Module helps protect key heater components from corrosion, supporting longer service life when the heater is properly installed and maintained.

With digital controls, electronic ignition, ASME construction, and Raypak’s service-friendly design, the B-R406A is built for powerful and reliable operation in commercial, public, and code-sensitive installations.

Ideal For

The Raypak 017374 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
• Applications requiring bronze headers
• Replacing older Raypak B-R406A ASME heaters
• Installations where high BTU output and durability are required

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 faster heat-up and dependable 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.

Bronze Headers

Bronze headers offer added strength and durability compared with standard polymer headers, making this model suitable for demanding pool and spa environments.

ProTek Shield Module

The included ProTek Shield Module helps protect against corrosion and supports longer heater component life.

Digital Control System

The digital control panel allows users to easily set and monitor pool or spa water temperature. 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 known for accessible components, practical service layout, and dependable field performance.

Benefits

The Raypak 017374 B-R406A gives facility managers, pool professionals, and homeowners a powerful combination of high BTU output, ASME construction, and long-term durability. Its 399K BTU rating makes it a strong fit for larger pool and spa applications where fast and reliable heating is important.

The bronze headers provide added durability for heavier-use environments, while the ProTek Shield Module helps protect against corrosion. 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 facility pool 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 017374 / B-R406A, is the natural gas version.

Q: How many BTUs is this heater?
A: This model is rated at 399,000 BTU.

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

Q: What is the benefit of bronze headers?
A: Bronze headers provide added durability and are commonly used in heavier-duty or commercial-style heater applications.

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: 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.