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PENTAIR SR400HD NATURAL GAS POOL & SPA HEATER – 400K BTU, CUPRO-NICKEL HEAT EXCHANGER
Dimensions: 26" W x 26" H x 30" D
Heating Capacity: 400,000 BTU
Fuel Type: Natural Gas
Heat Exchanger Tubing: Cupro-Nickel
Water Flow Rate: 40-120 GPM
Voltage: 120V / 240V / 60 Hz / 1 Phase
Weight: 138 lbs
Certification: CSA
The Pentair SR400HD Max-E-Therm Pool & Spa Heater delivers 400,000 BTU in the heavy-duty configuration - the HD designation means cupro-nickel tubing rather than standard copper.
That matters for salt-chlorinated pools and any water chemistry that runs aggressive. Copper heat exchangers corrode under those conditions; cupro-nickel does not, and it is the reason the HD and ASME HD models exist as a separate line.
An advanced ignition control module with flame strength sensor monitors combustion quality rather than simply confirming a flame is present, which catches degrading burner performance before it becomes a failure. A digital control with full-text display makes setup and diagnostics readable, and the unit connects to the Pentair IntelliCenter automation system. Pentair rates the optional bypass valve as cutting yearly operating costs by up to 35%.
Key Features
- 400,000 BTU heating capacity
- Natural Gas
- Heavy-duty cupro-nickel tubing for salt water and aggressive chemistry
- Advanced ignition control module with flame strength sensor
- Digital control with full-text display and menu-driven interface
- Pentair IntelliCenter automation compatible
- 40-120 GPM water flow rate
- Optional bypass valve reduces yearly operating cost up to 35%
- Compact 138 lb cabinet
- CSA certified
- 120V / 240V single-phase
Specifications
| Specification | Details |
| Brand | Pentair |
| Part Number | SR400HD |
| Series | Sta-Rite Max-E-Therm HD |
| Fuel Type | Natural Gas |
| BTU Input | 400,000 BTU |
| Heat Exchanger Tubing | Cupro-Nickel |
| Water Flow Rate | 40-120 GPM |
| Dimensions | 26" W x 26" H x 30" D |
| Cabinet Dimensions | 25.15" W x 30.03" H x 31.69" D |
| Weight | 138 lbs |
| Voltage | 120V / 240V |
| Phase | Single Phase |
| Frequency | 60 Hz |
| Ignition | Advanced Control Module with Flame Strength Sensor |
| Automation | Pentair IntelliCenter Compatible |
| Certification | CSA |
| Warranty | 2 Years (Professional Installation Required) |
What's Included
- Pentair SR400HD Max-E-Therm Pool & Spa Heater
- Cupro-nickel heat exchanger assembly
- Advanced ignition control module
- Digital control with full-text display
- Installation and operation documentation
The Pentair SR400HD pairs 400,000 BTU with cupro-nickel tubing and flame-strength ignition monitoring - the Max-E-Therm to specify for salt pools and demanding water chemistry.
Learn more at Pentair:
https://www.pentair.com/en-us/pool-spa/products/heaters-heat-pumps/max-e-therm-heater.html
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