Pentair Air Blower Kit Natural Gas Units (Models 400NA) | MasterTemp | 77707-0253 SLDT it compromises the filter's ability

it compromises the filter's ability to maintain a sealed connection between the tank and the plumbing — leading to pressure loss or water bypass around the filter

If your heater model number ends in ASME

fits Model 186 variants Pentair Leaf Traps R211092 (186-C assembly) Latch & O-ring kit

Large (Rear White Only)

8 per pack

Pentair Air Blower Kit Natural Gas Units (Models 400NA) | MasterTemp | 77707-0253 SLDT it compromises the filter's abilityOEM Blower Kit for the MasterTemp 400NA Natural Gas Heater The Pentair Air Blower Kit (77707 0253) is the OEM replacement blower assembly for the MasterTemp 400NA natural gas heater. This kit is specific to the 400NA natural gas configuration confirm your heater's model designation before ordering. IMPORTANT: HEATER COMPONENT LICENSED TECHNICIAN REQUIRED Gas and electrical heater components must be serviced by a licensed pool professional or qualified