Pentair Tube Sheet Coil Assembly Replacement Kit | MasterTemp & Max-E-Therm 400 | 77707-0234 Spine Boards Inspect the tank o-ring and

Inspect the tank o-ring and manifold assembly during re-grid service

8 hours: 60

Air intrusion issues are frequently caused by multiple small failures acting in combination — addressing them in a single service visit avoids repeat disassembly

inspect the inlet fitting adapter threads and seating surfaces for chemical scale buildup — calcium deposits from chlorine tablets are common and can prevent a proper seal

reducing cleaning coverage and efficiency

Pentair Tube Sheet Coil Assembly Replacement Kit | MasterTemp & Max-E-Therm 400 | 77707-0234 Spine Boards Inspect the tank o-ring andThe Pentair Tube Sheet Coil Assembly Replacement Kit (77707 0234) is the replacement heat exchanger assembly for the Pentair MasterTemp 400 and Pentair Sta Rite Max E Therm 400 pool and spa heaters. IMPORTANT: HEATER COMPONENT PROFESSIONAL SERVICE REQUIRED Gas and electrical heater components must be serviced by a licensed pool professional or qualified HVAC technician. Do not attempt to service gas or high voltage components without proper