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Item #:
402234
McDonnell & Miller FS4-3 General Purpose Liquid Flow Switch
87% of respondents would recommend this to a friend
Item #:
402234
NZD 413
Price Details
Excluding Shipping & Custom charges ( Shipping and custom charges will be calculated on checkout )
*All items will import from US
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In stock
Imported from USA store
QTY:
Order now and get it around Tuesday, December 01
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Note: Step Down Voltage Transformer required for using electronics products of US store (110 V-120 V). Recommended power converters Buy Now.
What Stands Out
Reliable Performance
Ensures consistent operation by accurately detecting liquid flow rates, preventing potential system failures and maintaining efficient process control across various applications.
Versatile Compatibility
Designed to work seamlessly with multiple liquids, making it suitable for diverse industrial applications while reducing the need for various switches.
Durable Construction
Built with high-quality materials that withstand tough environments, providing long-lasting durability and reducing maintenance costs over time.
Product Details
| Package Weight | 2.16 Pound |
Who Should Buy?
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HVAC Systems
Ideal for HVAC professionals needing reliable flow detection to optimize system performance and prevent equipment damage.
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Industrial Applications
Well-suited for various industrial processes where liquid flow monitoring is crucial for operational efficiency and safety.
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Water Treatment
Effective for water treatment facilities requiring precise flow measurement to ensure proper chemical dosing and system integrity.
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High Viscosity Fluids
Not suitable for fluids with high viscosity that could impede the functionality of the flow switch.
Product Description
McDonnell & Miller FS4-3 General Purpose Liquid Flow Switch
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Customer Questions & Answers
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Question:
How to Shop McDonnell & Miller FS4-3 General Purpose Liquid Flow Online From Ubuy?
Answer: It’s easy to shop McDonnell & Miller FS4-3 General Purpose Liquid Flow online from Ubuy. You just have to search for the product, choose your shipping method while checking out and get it delivered to your location. -
Question:
Is McDonnell & Miller FS4-3 General Purpose Liquid Flow Available to Shop Online in New Zealand?
Answer: Yes, at Ubuy New Zealand this product is available for you to shop at a reasonable price. The McDonnell & Miller FS4-3 General Purpose Liquid Flow is not available locally but you can trust us with our express shipping services. -
Question:
How Long Does It Take to Get Product After Placing the Order?
Answer: The delivery time of your ordered product varies as per what you've ordered and the shipping method that you've chosen. The estimated delivery time is mentioned during the checkout process, so be carefree while shopping.
Mcdonnell & Miller Flow Switches Editorial Review
The 3/4" Water Flow Switch is an essential component that has become popular among commercial water heaters and boilers. The switch is quite sensitive, so it should be installed at a distance of 1/2" to 1" from the bottom of the water flow. When installed correctly, it works great and saves time. The product is highly efficient, with a 120VAC switch rating of 7.4 Full Load Amps and 240VAC is 3.7 Full Load Amp. The pricing is competitive, and the switch has a long lifespan of 5-7 years, especially in areas with very hard water.
Customer Reviews & Ratings
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Pros
- Highly efficient
- Good value for money
- Easy to install
- Works great when installed correctly
Cons
- Sensitive, and can trip if not installed at the correct distance from the bottom of the water flow.
Platform Trust & Buyer Confidence
H
Heather
Verified buyer
“Easy to use, quick delivery and a quality product at a reasonable price. Would use Ubuy again.”
Nov 3, 2026 · via Trustpilot
DB
Dax Bhana
Verified buyer
“Easy purchase of a wonderful product. A little worried that the product's design and size were slightly different from the original 2 pairs gifted to me. Spenco Women's Supreme Slide Mule does not disappoint. I'm very happy with this product. Delivery was on time and as per the instructions. I will likely purchase this product again.”
Nov 5, 2026 · via Trustpilot
DD
David
Verified buyer
“Great service, fast delivery and the item is just as described. Very happy.”
Nov 5, 2026 · via Trustpilot
MD
Manfred
Verified buyer
“It's a hassle-free service. Thank you very much.”
22 October 2026 · via Trustpilot
MT
Michelle
Verified buyer
“Great product, great price and great delivery! We were able to find a hard to get item at a great price and delivered quite quickly considering it was coming from overseas. ”
31 October 2026 · via Trustpilot
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Important information
- Limitations : For products shipped internationally, please note that any manufacturer warranty may not be valid; manufacturer service options may not be available; product manuals, instructions, and safety warnings may not be in destination country languages; the products (and accompanying materials) may not be designed in accordance with destination country standards, specifications, and labeling requirements; and the products may not conform to destination country voltage and other electrical standards (requiring use of an adapter or converter if appropriate). The recipient is responsible for assuring that the product can be lawfully imported to the destination country. When ordering from Ubuy or its affiliates, the recipient is the importer of record and must comply with all laws and regulations of the destination country.
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NZD 413
Order now and get it around Tuesday, December 01
This item is not restrict in my country.(Please click on above link if this item is not restrict in your country, So our team will review and allow.)
QTY:
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