Pentair Flameholder Kit - Model 400 | MasterTemp | 77707-0204 inSPAration always install a freshly lubricated

always install a freshly lubricated O-ring at the same time — a worn O-ring is the most common cause of leaks at this connection point

Acu-Trol® AK600 Quantity Included 1 sensor Pro Tip

Pentair Part Number 274407Z Also Known As / Legacy Part Number 274407 (base)

Check the manufacture date label on your pump before ordering

Replacing a worn or broken locking bar restores the structural integrity of the cleaner head assembly

Pentair Flameholder Kit - Model 400 | MasterTemp | 77707-0204 inSPAration always install a freshly lubricatedThe Pentair Flameholder Kit (77707 0204) is the OEM replacement flameholder assembly for the MasterTemp 400 gas heater burner system, covering both natural gas (400NA) and liquid propane (400LP) configurations. IMPORTANT: KIT LISTING MULTIPLE COMPONENTS INCLUDED This listing is a kit, not a single component. It includes Item Nos. 10, 11, 12, 13, and the Flameholder Insert as a complete assembly. Verify all included items against your equipment's