Experience powerful, dependable pool heating with the Pentair MasterTemp ASME HD 400 Heater in natural gas. This 400K BTU heater is engineered for performance and built to last, with ASME certification for enhanced safety and reliability in both residential and commercial pools and spas.

• 400,000 BTU input for rapid heating and consistent water temperatures.
• Natural gas operation delivers steady, economical heating with reliable performance.
• ASME-certified HD design provides enhanced safety, compliance, and rugged durability for demanding environments.
• Compact, easy-to-install cabinet simplifies installation and service access.
• Durable construction designed to withstand the rigors of pool equipment environments.
• Built-in diagnostics and intuitive controls speed maintenance and minimize downtime.
• Trusted Pentair quality backed by a broad support network for ongoing peace of mind.

Whether upgrading an existing system or outfitting a new installation, the MasterTemp HD 400 delivers fast, efficient heat with professional-grade reliability. Choose this heater for robust performance, compliance-ready design, and long-lasting value.