McDonnell & MillerReplacement Paddle Kits

MCDONNELL & MILLER Paddle Kit: Paddle Kit, (1) Each of 1 in, 2 in, 3 in

The MCDONNELL & MILLER Paddle Kit (MPN FS4-15SS) is a replacement paddle kit containing one each of 1 in, 2 in, 3 in, and 6 in paddles. This 4-piece kit is compatible with manufacturer model number FS254.

SKU 3G-OTH-91731

Brand

McDonnell & Miller

Item

Paddle Kit: Paddle Kit,

Technical Specifications

McDonnell & Miller

Manufacturer Part Number

FS4-15SS 

Type

(1) Each of 1 in, 2 in, 3 in, and 6 in Paddles, 4 PK 

Includes

(1) Each of 1 in, 2 in, 3 in, and 6 in Paddles 

Compatible with Grainger Part Number

2RUL4 

Compatible with Manufacturer Model Number

FS254 

View Full Spec Sheet

Technical Documents

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McDonnell & Miller Products

3G Electric (S) Pte. Ltd. — Singapore

Product Description

Frequently Asked Questions

What is the MCDONNELL & MILLER FS4-15SS paddle kit used for?

The MCDONNELL & MILLER FS4-15SS paddle kit is a replacement set of flow-sensing paddles for industrial flow switches, such as the FS254 model. It is used in HVAC, boiler, and process piping systems to detect liquid flow and trigger safety or control actions.

What are the specifications of the MCDONNELL & MILLER FS4-15SS paddle kit?

The FS4-15SS kit includes one each of 1 in, 2 in, 3 in, and 6 in paddles, totaling four pieces. It is compatible with manufacturer model number FS254 and Grainger part number 2RUL4. The brand is MCDONNELL & MILLER, and the manufacturer part number is FS4-15SS.

Where to buy the MCDONNELL & MILLER FS4-15SS paddle kit worldwide?

You can source the MCDONNELL & MILLER FS4-15SS paddle kit through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations, ensuring the kit reaches your facility reliably.

How to select the correct paddle kit for a McDonnell & Miller flow switch?

To select the correct paddle kit, verify your flow switch model number. The FS4-15SS kit is designed for the FS254 model and includes 1 in, 2 in, 3 in, and 6 in paddles. Always match the paddle length to your pipe diameter for accurate flow sensing.

Used in

Common applications for McDonnell & Miller

Steam boiler low-water cutoff — McDonnell & Miller inline flow switches (e.g., FS-1) for automatic burner shutdown

Cooling water flow monitoring — McDonnell & Miller insertion-style switches (e.g., FS4-3D) in large-diameter pipes

Hazardous-area process lines — McDonnell & Miller FS7-4E with NEMA 7/9 enclosure for Class I, Div 1 locations

HVAC chilled water systems — McDonnell & Miller FS6-1 inline switch for pump flow verification

Industrial wastewater treatment — McDonnell & Miller FS4-3S stainless steel switch for corrosive fluid flow detection

Boiler feedwater control — McDonnell & Miller FS8-WJ with BSP connections for international installations

McDonnell & Miller Products

3G Electric supplies McDonnell & Miller replacement paddle kits. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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