McDonnell & Miller 336101 Paddle Kit

The McDonnell & Miller 336101 Paddle Kit is a critical replacement component for maintaining accurate liquid flow switch operation in hydronic and industrial piping systems. This reinforced stainless steel paddle kit includes a 1-inch and a 6-inch paddle, specifically engineered for compatibility with the FS4-3RP and FS4-15RP models, as well as the FS8-W series. Designed for field technicians, these paddles are constructed from high-grade 304 stainless steel to resist corrosion and handle the mechanical stresses of varying flow velocities. Proper installation ensures the flow switch paddle assembly correctly actuates the SPDT internal switch, providing reliable system protection or process control. Whether you are servicing a chiller, boiler, or process cooling line, using the correct FS4-3RP replacement parts is essential for preventing nuisance trips and ensuring the safety of the downstream equipment. This kit comes complete with the necessary hardware for a secure, professional attachment to the switch arm.

• Compatible with McDonnell & Miller FS4-3RP, FS4-15RP, and FS8-W liquid flow switches.
• Constructed from durable stainless steel for superior corrosion resistance in diverse fluid environments.
• Includes multiple sizes (1" and 6") to allow for field customization based on specific pipe diameter requirements.
• Reinforced design prevents paddle deformation under high-velocity flow conditions, maintaining calibration over time.
• Direct OEM replacement ensures precise fitment and eliminates the need for field modifications.

• How do I determine which paddle size to use for my installation? For larger pipe diameters, the 6-inch paddle provides the necessary surface area for low-flow sensitivity, while the 1-inch paddle is ideal for smaller trade sizes. Always refer to the flow switch manual's "Paddle Sizing Chart" to match the paddle length to your specific GPM requirement.
• Can these paddles be trimmed if they are too long for the pipe? Yes, the stainless steel paddles can be field-trimmed to the appropriate length. Ensure there is at least 1/4" clearance between the paddle tip and the pipe wall to prevent mechanical interference.
• Is the mounting hardware included in the 336101 kit? Yes, the kit includes the reinforced paddles along with the necessary screws and washers for a complete flow switch repair.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.