
Pentair MasterTemp 400 ASME HD Natural Gas Heater Bronze Headers, Cupronickel, 461021
Pentair MasterTempĀ® 461021 Digital IID Heavy-Duty High Performance Natural Gas Low NOx Pool and Spa Heater with Cupro Nickel Tubing 400K ASME HD BTU
Ultra-High ASMEĀ® certified performance in a compact, quiet, and eco-friendly design for your commercial application.
- The bronze header design allows easy access to the thermal regulator and bypass valve service without special tools.
- Upgrades to the thermal regulator include a governing stainless steel sleeve for better wear protection.
- All internal components of the bronze header are now plastic for lightweight, corrosion, and wear protection.
- The ignition Control Module includes more diaphragm spring force for better gas control and robust operation.
- The fuller pre-mixed system with a highly efficient air and gas mixture allows for faster heat-up times.
- Efficiencies up to 84%
Support Documents
-
MasterTemp ASME Brochure
- MasterTemp ASME Heater Manual
Specifications:
- Brand: Pentair
- Application: Commercial, Indoor, Outdoor, Pool, Spa
- Cabinet Depth: 32.61 inch
- Cabinet Height: 28.15 inch
- Cabinet Width: 23.02 inch
- Commercial, Residential, or Professional: Commercial
- Control Type: Digital
- Weight: 149 pounds
- Flow Rate Max: 120 gal/min
- Flow Rate Min: 120 gal/min
- Frequency Rating (Hz): 60
- Fuel Type: Natural Gas
- Green or Energy-Efficient Product: True
- Phase: Single
- Standards Approvals: ASME Certified
- Voltage: 120V, 240V
- BTU Input: 400,000 British thermal units
- Gas Connection: 0.75 inch
- Tubing Material: Cupro Nickel
- UPC Code: 788379858278
- Warranty: 2 years
What is the difference between Pentair ASME and ASME HD pool heaters?
Pentair ASME HD pool heaters are built for heavy commercial use, while standard ASME heaters are meant for residential and light commercial applications. The HD models use cupronickel heat exchangers, while standard ASME heaters use copper. All MasterTemp ASME heaters feature a bronze header design.
MasterTemp ASME Commercial Heater Models:
- 461000 Natural 200 ASME
- 460771 Natural 250 ASME
- 461020 Natural 250 ASME HD
- 460775 Natural 400 ASME
- 461021 Natural 400 ASME HD
Original: $5,599.00
-65%$5,599.00
$1,959.65Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
Pentair MasterTempĀ® 461021 Digital IID Heavy-Duty High Performance Natural Gas Low NOx Pool and Spa Heater with Cupro Nickel Tubing 400K ASME HD BTU
Ultra-High ASMEĀ® certified performance in a compact, quiet, and eco-friendly design for your commercial application.
- The bronze header design allows easy access to the thermal regulator and bypass valve service without special tools.
- Upgrades to the thermal regulator include a governing stainless steel sleeve for better wear protection.
- All internal components of the bronze header are now plastic for lightweight, corrosion, and wear protection.
- The ignition Control Module includes more diaphragm spring force for better gas control and robust operation.
- The fuller pre-mixed system with a highly efficient air and gas mixture allows for faster heat-up times.
- Efficiencies up to 84%
Support Documents
-
MasterTemp ASME Brochure
- MasterTemp ASME Heater Manual
Specifications:
- Brand: Pentair
- Application: Commercial, Indoor, Outdoor, Pool, Spa
- Cabinet Depth: 32.61 inch
- Cabinet Height: 28.15 inch
- Cabinet Width: 23.02 inch
- Commercial, Residential, or Professional: Commercial
- Control Type: Digital
- Weight: 149 pounds
- Flow Rate Max: 120 gal/min
- Flow Rate Min: 120 gal/min
- Frequency Rating (Hz): 60
- Fuel Type: Natural Gas
- Green or Energy-Efficient Product: True
- Phase: Single
- Standards Approvals: ASME Certified
- Voltage: 120V, 240V
- BTU Input: 400,000 British thermal units
- Gas Connection: 0.75 inch
- Tubing Material: Cupro Nickel
- UPC Code: 788379858278
- Warranty: 2 years
What is the difference between Pentair ASME and ASME HD pool heaters?
Pentair ASME HD pool heaters are built for heavy commercial use, while standard ASME heaters are meant for residential and light commercial applications. The HD models use cupronickel heat exchangers, while standard ASME heaters use copper. All MasterTemp ASME heaters feature a bronze header design.
MasterTemp ASME Commercial Heater Models:
- 461000 Natural 200 ASME
- 460771 Natural 250 ASME
- 461020 Natural 250 ASME HD
- 460775 Natural 400 ASME
- 461021 Natural 400 ASME HD


















