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Blue And White (F-451004LHN) 4.0 - 40 GPM Flow Meter; 1" FPT; IL

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Blue And White (F-451004LHN) 4.0 - 40 GPM Flow Meter; 1" FPT; IL

The Blue & White F-451004LHN is a 1" FPT inline flow meter engineered to measure water flow rates from 4.0 to 40 gallons per minute with precision and chemical resistance. Built with injection-molded polysulfone and Quick Loc half-union adapters, this flow meter is designed for reliable performance in residential, commercial, and light industrial water treatment applications.
SPECIFICATIONS

F-451004LHN Core Specs

Flow Range
4.0 – 40 GPM
Gallons per minute
Connection Size
1" FPT
Female pipe thread
Material
Polysulfone
Chemical resistant
Mount Type
Inline
Quick Loc adapters
Thread Standard
NPT
National pipe thread
Scale Type
Dual Scale
Easy reading
TECHNICAL DETAILS

Construction & Features

Model Number F-451004LHN
Manufacturer Blue & White Industries
Body Material Injection molded polysulfone, chemical resistant
Adapter System Quick Loc half-union adapters for fast installation
Thread Type 1 inch Female NPT (National Pipe Thread)
Installation Configuration Inline (IL) mounting
Scale Options Dual scale and single scale available across F-451 series
COMPATIBILITY & APPLICATIONS

Where This Flow Meter Works

The F-451004LHN is compatible with reverse osmosis systems, whole-house filtration setups, commercial water treatment equipment, and light industrial applications requiring accurate flow measurement between 4.0 and 40 GPM. The 1" female NPT threads connect directly to standard pipe fittings, while the Quick Loc adapters allow for tool-free installation and removal. The chemical-resistant polysulfone construction withstands exposure to chlorine, cleaning agents, and common water treatment chemicals without degradation. Ideal for monitoring flow rates in booster pump systems, post-filtration lines, and process water applications where precise GPM readings are necessary for system optimization and compliance.

💧 Pro tip: Flow meters should be installed in straight runs of pipe with at least 5 pipe diameters of straight pipe upstream and 2 diameters downstream for accurate readings. The F-451 series Quick Loc design makes periodic cleaning and maintenance simple without cutting pipe or breaking unions.
The Blue & White F-451004LHN is a 1" FPT inline flow meter engineered to measure water flow rates from 4.0 to 40 gallons per minute with precision and chemical resistance. Built with injection-molded polysulfone and Quick Loc half-union adapters, this flow meter is designed for reliable performance in residential, commercial, and light industrial water treatment applications.
SPECIFICATIONS

F-451004LHN Core Specs

Flow Range
4.0 – 40 GPM
Gallons per minute
Connection Size
1" FPT
Female pipe thread
Material
Polysulfone
Chemical resistant
Mount Type
Inline
Quick Loc adapters
Thread Standard
NPT
National pipe thread
Scale Type
Dual Scale
Easy reading
TECHNICAL DETAILS

Construction & Features

Model Number F-451004LHN
Manufacturer Blue & White Industries
Body Material Injection molded polysulfone, chemical resistant
Adapter System Quick Loc half-union adapters for fast installation
Thread Type 1 inch Female NPT (National Pipe Thread)
Installation Configuration Inline (IL) mounting
Scale Options Dual scale and single scale available across F-451 series
COMPATIBILITY & APPLICATIONS

Where This Flow Meter Works

The F-451004LHN is compatible with reverse osmosis systems, whole-house filtration setups, commercial water treatment equipment, and light industrial applications requiring accurate flow measurement between 4.0 and 40 GPM. The 1" female NPT threads connect directly to standard pipe fittings, while the Quick Loc adapters allow for tool-free installation and removal. The chemical-resistant polysulfone construction withstands exposure to chlorine, cleaning agents, and common water treatment chemicals without degradation. Ideal for monitoring flow rates in booster pump systems, post-filtration lines, and process water applications where precise GPM readings are necessary for system optimization and compliance.

💧 Pro tip: Flow meters should be installed in straight runs of pipe with at least 5 pipe diameters of straight pipe upstream and 2 diameters downstream for accurate readings. The F-451 series Quick Loc design makes periodic cleaning and maintenance simple without cutting pipe or breaking unions.
$699.00
Blue And White (F-451004LHN) 4.0 - 40 GPM Flow Meter; 1" FPT; IL
$699.00

Description

The Blue & White F-451004LHN is a 1" FPT inline flow meter engineered to measure water flow rates from 4.0 to 40 gallons per minute with precision and chemical resistance. Built with injection-molded polysulfone and Quick Loc half-union adapters, this flow meter is designed for reliable performance in residential, commercial, and light industrial water treatment applications.
SPECIFICATIONS

F-451004LHN Core Specs

Flow Range
4.0 – 40 GPM
Gallons per minute
Connection Size
1" FPT
Female pipe thread
Material
Polysulfone
Chemical resistant
Mount Type
Inline
Quick Loc adapters
Thread Standard
NPT
National pipe thread
Scale Type
Dual Scale
Easy reading
TECHNICAL DETAILS

Construction & Features

Model Number F-451004LHN
Manufacturer Blue & White Industries
Body Material Injection molded polysulfone, chemical resistant
Adapter System Quick Loc half-union adapters for fast installation
Thread Type 1 inch Female NPT (National Pipe Thread)
Installation Configuration Inline (IL) mounting
Scale Options Dual scale and single scale available across F-451 series
COMPATIBILITY & APPLICATIONS

Where This Flow Meter Works

The F-451004LHN is compatible with reverse osmosis systems, whole-house filtration setups, commercial water treatment equipment, and light industrial applications requiring accurate flow measurement between 4.0 and 40 GPM. The 1" female NPT threads connect directly to standard pipe fittings, while the Quick Loc adapters allow for tool-free installation and removal. The chemical-resistant polysulfone construction withstands exposure to chlorine, cleaning agents, and common water treatment chemicals without degradation. Ideal for monitoring flow rates in booster pump systems, post-filtration lines, and process water applications where precise GPM readings are necessary for system optimization and compliance.

💧 Pro tip: Flow meters should be installed in straight runs of pipe with at least 5 pipe diameters of straight pipe upstream and 2 diameters downstream for accurate readings. The F-451 series Quick Loc design makes periodic cleaning and maintenance simple without cutting pipe or breaking unions.
Blue And White (F-451004LHN) 4.0 - 40 GPM Flow Meter; 1" FPT; IL | Isopure Water