The Jandy Heat Exchanger & Header Assembly 400K (R0805805) delivers professional-grade performance for pool contractors servicing JXi™ 400 heater systems. This ASME-compliant combustion chamber assembly provides reliable 399,000 BTU/HR output with 84% thermal efficiency, making it the trusted choice for commercial pool heating installations and service calls.

Commercial Contractor Benefits

Engineered for demanding commercial applications, this assembly features copper/cupronickel heat exchanger tubes and polymer/bronze headers that resist corrosion and extend service life. The self-compensating venturi combustion system operates efficiently at high altitudes up to 4,500 ft, reducing callbacks and ensuring consistent performance across diverse installation sites. Compatible with both natural gas and LP systems, providing installation flexibility for contractors.

Why Pool Contractors Choose MT Pools

MT Pools understands the urgency of heater repairs and replacements. Our superior customer service ensures you get the right parts quickly, keeping your commercial projects on schedule. With wholesale B2B pricing and expert technical support, we're your trusted partner for high-value contractor orders averaging $7,000-$10,000.

Frequently Asked Questions

Order Your Replacement Assembly Today

Don't let heater downtime impact your commercial projects. Order the Jandy R0805805 heat exchanger assembly from MT Pools and experience the superior customer service that keeps contractors coming back. Our technical experts are ready to support your installation success.