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4.0 GPM Flo-Trol Flow Regulator 1" FPT Female No Lead CDX4.0

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MSRP $150.90

Sale Price $75.45

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SKU#

CDX4

In stock

CDX4

Key Features: Constant Flow Performance

Constant 4.0 gpm Flow Rate: Delivers steady flow regardless of pressure fluctuations to help save water, and in compatible showerhead applications a 4.0 gpm showerhead can still provide a steady feel similar to higher-flow models while reducing water use
Automatic Flow Regulation: Flexible internal orifice adjusts automatically to changing system pressure, similar to automatic flow control valves used to maintain consistent performance
No Moving Parts: Reduces wear and maintenance requirements for long-term reliability
Stainless Steel Construction: Durable and corrosion-resistant, with quality internal components built for extended service life
No Lead Design: Safe for potable water applications
Laser Engraved Markings: Clearly displays flow rate and connection size for easy identification
NSF Certified: Approved for drinking water systems under NSF/ANSI 61 and 372 standards, which is important for quality and compliance
Engineered for Consistency: Designed to maintain performance despite changes in water temperature and pressure variation

Overview

Flo-Trol is one of the 4.0 gpm flow regulators, or flow control valves, used to regulate water in plumbing fixtures such as faucets and showerheads, and this model is rated for 4.0 gpm with 1" female NPT connections. A 4.0 gpm flow regulator limits water flow to a maximum of 4.0 gallons per minute.

Engineered to maintain consistent flow across a wide pressure range, Flo-Trol uses a flexible orifice with no moving parts for reliable performance in potable water systems. Built with a stainless-steel body and Buna-N orifice, it maintains flow within ±15% between 15 and 125 PSI, helping homeowners, commercial property managers, and contractors improve water system efficiency, reduce maintenance, and support dependable long-term operation. This page covers the key specifications, construction, flow accuracy, operating pressure range, certification, and application details you need to evaluate the right 4.0 gpm flow regulator for residential or commercial use.

Product Specifications for Flow Regulators

Model: CDX4
Flow Rate: 4.0 gpm; lower flow rates help prevent excessive water use and can reduce stress on plumbing systems
Connection Size: 1" Female NPT (FPT)
Connection Type: Female Threaded Inline Connection
Valve Body Material: Stainless Steel
Orifice Material: Buna-N
Certification: NSF/ANSI 61 & 372 Certified for potable water systems
Construction: No Lead

Benefits of Stainless Steel Construction

Maintains consistent water flow performance
Helps improve water system efficiency by saving water and reducing energy use through lower hot-water consumption
Reduces maintenance with a no-moving-parts design
Corrosion-resistant stainless steel body for durability
Suitable for residential and commercial use where dependable flow control supports everyday performance

Specifications

More Information
Flow Rate	4
Discharge Connection	1" Female NPT
Material	Stainless Steel
Model #	CDX4
Manufacturer	Aqua Science
Shipping Weight	2

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FAQs

What flow rate is this regulator designed for?

It is designed for a constant 4.0 GPM flow rate.

What pressure range supports the rated flow?

Flow is maintained within ±15% between 15 and 125 PSI.

What connection size does it use?

It has a 1 inch female NPT connection.

What materials are used in the valve?

The valve body is stainless steel and the orifice is Buna-N.

Does the internal mechanism have moving parts?

No, the internal controlling mechanism has no moving parts.

Where is this flow regulator used?

It is used with booster pumps and domestic water systems.

Is this regulator certified?

Yes, it is NSF/ANSI 61 and 372 certified.

Can flow vary in actual use?

Yes, the supplied description states flow can vary due to manufacturing tolerances and water temperatures.

Installation Tips

Installation Brief

This automatic flow control valve is installed inline to help maintain a constant 4.0 GPM flow rate in the appropriate system.

Confirm the regulator matches your required 4.0 GPM flow rate and 1 inch female NPT connection.
Install the valve at the intended connection point in the system.
Make sure the regulator is fully connected before returning the system to service.
Check the system after installation to confirm normal operation.