Product Overview

Restore dependable heat-transfer performance in a compatible commercial Raypak pool or spa heater with the Raypak 336A/337A Cupro-Nickel ASME Heat Exchanger Tube Bundle | 010370F. This genuine Raypak OEM replacement tube bundle is specifically designed for compatible 336A and 337A ASME heaters with metal headers manufactured prior to December 2019.

Constructed with durable cupro-nickel tubing, the 010370F is engineered for demanding commercial and high-use aquatic applications where additional corrosion resistance is preferred. The tube bundle transfers heat produced by the heater's burner system into the circulating pool or spa water while remaining isolated from the combustion chamber.

Over time, heat exchangers can develop leaks, corrosion, scale buildup, freeze damage, or other deterioration. Replacing a damaged tube bundle can restore proper water containment and heat-transfer performance without requiring replacement of the complete heater.

Key Features

• Genuine Raypak OEM replacement
• Manufacturer Part Number: 010370F
• Cupro-nickel ASME tube bundle
• Designed for compatible 336A / 337A heaters
• For ASME metal-header configurations
• For units manufactured prior to 12/2019
• Heavy-duty cupro-nickel construction
• Designed for commercial pool and spa heaters
• Enhanced corrosion resistance compared with standard copper
• Factory replacement for leaking or damaged tube bundles
• Suitable for applicable natural gas and propane configurations
• Professional installation recommended

Product Specifications

Important Compatibility Information

The manufacturing date and header configuration are critical when selecting this tube bundle.

For applicable ASME heaters:

• 336A/337A before 12/2019: Cupro-Nickel 010370F
• 336A/337A from 12/2019 forward: Cupro-Nickel 017980F

Do not order this component based only on the 336A heater designation.

Residential/non-ASME 336A heaters with polymer headers use different tube bundles and are not interchangeable with the ASME metal-header configuration.

Before ordering, verify the heater's model number, serial number, manufacturing date, header type, and existing replacement-parts diagram.

Why Choose Cupro-Nickel?

Cupro-nickel combines copper's excellent heat-transfer properties with nickel for increased resistance to demanding water conditions.

It is frequently used in commercial aquatic facilities, high-use pools, and other applications where additional heat exchanger durability is desired.

Proper pool chemistry remains essential. Low pH, excessive sanitizer concentration, improper water flow, scale accumulation, or incorrectly installed chemical feeders can damage even a cupro-nickel exchanger.

Common Reasons for Replacement

A tube bundle may require replacement due to:

• Water leaking inside the heater
• Corroded heat exchanger tubes
• Freeze damage
• Severe mineral scaling
• Physical tube damage
• Water entering the combustion area
• Reduced heater performance
• Chemical damage from improper water balance

The underlying cause of failure should be diagnosed before installing the replacement.

Frequently Asked Questions

What heaters does Raypak 010370F fit?

It is designed for compatible Raypak 336A and 337A ASME metal-header heaters manufactured prior to December 2019.

Is 010370F cupro-nickel?

Yes. 010370F is the cupro-nickel ASME tube bundle.

What part is used for a 336A ASME heater made after December 2019?

Raypak lists 017980F for the applicable newer cupro-nickel ASME 336A/337A configuration.

Is this the same as the residential 336A tube bundle?

No. Residential polymer-header models use different tube bundles. The ASME and residential versions are not interchangeable.

Is there a copper version?

For compatible pre-12/2019 336A/337A ASME heaters, 010057F is the corresponding copper tube bundle.

Is this a genuine Raypak part?

Yes. 010370F is a genuine Raypak OEM replacement component.