Pentair 32850-0099 is a Fireman’s Switch fuse designed for compatible Pentair heater electrical system applications. Pentair replacement parts documentation identifies this component as a 1.25-amp, 1-1/4-inch fuse used in the heater control circuit, making it a direct service replacement when the original fuse requires replacement.
Key Features
• This replacement fuse is identified by Pentair as the Fireman’s Switch fuse for compatible heater electrical system applications.
• Pentair specifies this part as a 1.25-amp fuse.
• Pentair documentation lists the fuse size as 1-1/4 inch.
• This component is used in compatible heater control and electrical system assemblies where the exact Pentair part number is required.
• The fuse is intended for service replacement when the original Fireman’s Switch fuse has opened or needs to be replaced.
• Pentair lists this part in MasterTemp heater replacement parts documentation, including MasterTemp 125 electrical system parts.
• The same fuse part number also appears in Pentair Max-E-Therm and ETi heater replacement parts documentation.
• Using the exact replacement fuse part number helps maintain the intended electrical service configuration of the heater.
Product Overview
The Pentair 32850-0099 Fireman’s Switch fuse is a replacement electrical component used in compatible Pentair heater systems. Pentair’s official parts documentation consistently identifies this SKU as the Fireman’s Switch fuse and specifies it as a 1.25-amp, 1-1/4-inch fuse. Because Pentair uses this same part number across multiple heater parts breakdowns, matching the exact SKU is important when servicing the heater electrical system.
This fuse appears in Pentair documentation for MasterTemp, MasterTemp 125, Max-E-Therm, and ETi heater electrical systems, confirming its role as a heater electrical service part rather than a general-purpose hardware item. For accuracy, the safest retail naming is Pentair 32850-0099 Fireman’s Switch Fuse, 1.25A, 1-1/4", while avoiding unverified voltage claims that are not stated for the fuse itself in the Pentair parts descriptions.














