Replacement Faucet Aerator Inserts

by Neoperl®

Is your Neoperl® aerator running slow? No need to replace the whole aerator! We offer a variety of replacement aerator inserts that will allow you to refresh your faucet without spending any extra money to replace the aerator housing. Our selection includes many different sizes, spray patterns, and features. With the help of PlumbingSupply.com®, your Neoperl® aerator will be as good as new in no time!
click any of the flow rates below to be directed to that section
0.35 GPM
0.50 GPM
1.0 GPM
1.2 GPM
 
1.5 GPM
1.8 GPM
2.2 GPM

Neoperl ® Aerator Installation Keys

Due to their internal design, some of these aerators require a special key to install, tighten, and remove them from your faucet. The aerators offered below do not include an installation key, so be sure you order the appropriate key to ensure you can install your aerators as quickly as possible!

Please Note: You only need one key of a particular size to install any aerator of that size!
Tiny Junior Size Aerator Key for Cache® AeratorsTiny Junior Size
(M18.5 x 1) $1.54
Junior Size (M21.5 x 1) Aerator Key for Slim Cache® AeratorsJunior Size (Slim)
(M21.5 x 1) $0.99

Replacement Faucet Aerator Inserts

Ultimate Low Flow 0.35 GPM Aerator Inserts
(approximately 10.7 seconds to fill 8oz glass)

Example Description Stream Aerator Installation Key
Regular .35 GPM Pressure Compensating Aerator Insert 13-6350 Regular Size Insert
Pressure Compensating - With 1 washer each for male or female housings		 Spray Stream $1.16  N/A  Enter a quantity and
Regular .35 GPM Pressure Compensating Silicone-Tipped Aerator Insert 17-5350 Regular Size Insert
Pressure Compensating - Silicone Tip - With 1 washer each for male or female housings		 Spray Stream $2.20  N/A  Enter a quantity and
Regular .35 GPM Antimicrobial Pressure Compensating Aerator Insert 30-9350 Regular Size Insert
Pressure Compensating - Antimicrobial - With 1 washer each for male or female housings		 Spray Stream $2.94  N/A  Enter a quantity and
Regular .35 GPM Pressure Compensating Mikado® Aerator Insert 13-6350 Regular Size Insert
Pressure Compensating - With 1 washer each for male or female housings		 Mikado® Stream $3.24  N/A  Enter a quantity and
Regular .35 GPM Pressure Compensating Slim Spray® Aerator Insert 16-0340-5 Regular Size Insert
Pressure Compensating - 		Slim Spray® Stream $4.03 $0.99 Enter a quantity and
Junior .35 GPM Pressure Compensating Aerator Insert 13-6650 Junior Size Insert
Pressure Compensating - With 1 washer each for male or female housings		 Spray Stream $1.40  N/A  Enter a quantity and
Junior .35 GPM Pressure Compensating Silicone-Tipped Aerator Insert 17-5650 Junior Size Insert
Pressure Compensating - Silicone Tip - With 1 washer each for male or female housings		 Spray Stream $3.17  N/A  Enter a quantity and
Junior .35 GPM Antimicrobial Pressure Compensating Aerator Insert 30-9650 Junior Size Insert
Pressure Compensating - Antimicrobial - With 1 washer each for male or female housings		 Spray Stream $2.78  N/A  Enter a quantity and
Junior .35 GPM Pressure Compensating Slim Spray® Aerator Insert 16-0310-5 Junior Size Insert
Pressure Compensating - 		Slim Spray® Stream $3.95 $1.54 Enter a quantity and
Tom Thumb® .35 GPM Pressure Compensating Aerator Insert 13-6950 Tom Thumb® Size Insert
Pressure Compensating - With 1 washer each for male or female housings		 Spray Stream $5.33  N/A  Enter a quantity and
Order 6 or more of the same item for greater savings!
Or order 50 or more of the same item for even greater savings!!!
Pricing discounts will be shown in the shopping cart.

Ultra Low Flow 0.5 GPM Aerator Inserts
(approximately 7.5 seconds to fill 8oz glass)

Example Description Stream Aerator Installation Key
Regular .5 GPM Pressure Compensating Aerator Insert 10-2350 Regular Size Insert
Pressure Compensating - With 1 washer each for male or female housings		 Spray Stream $1.86  N/A  Enter a quantity and
Regular .5 GPM Pressure Compensating Silicone-Tipped Aerator Insert 13-7350 Regular Size Insert
Pressure Compensating - Silicone Tip - With 1 washer each for male or female housings		 Spray Stream $1.91  N/A  Enter a quantity and
Regular .5 GPM Antimicrobial Pressure Compensating Aerator Insert 14-0350 Regular Size Insert
Pressure Compensating - Antimicrobial - With 1 washer each for male or female housings		 Spray Stream $2.96  N/A  Enter a quantity and
Regular .5 GPM Pressure Compensating Screenless Aerator Insert 31-2350 Regular Size Insert
Pressure Compensating - Screenless Cascade® Construction - With 1 washer each for male or female housings		 Aerated Stream $3.61  N/A  Enter a quantity and
Regular .5 GPM Pressure Compensating Aerator Insert 14-8350 Regular Size Insert
Pressure Compensating - With 1 washer each for male or female housings		 Laminar Stream $3.42  N/A  Enter a quantity and
Regular 0.50 GPM Pressure Compensating Mikado® Aerator Insert 33-1350 Regular Size Insert
Pressure Compensating - With 1 washer each for male or female housings		 Mikado® Stream $3.26  N/A  Enter a quantity and
Regular .5 GPM Pressure Compensating Slim Spray® Aerator Insert 13-0580-5 Regular Size Insert
Pressure Compensating - 		Slim Spray® Stream $4.02 $0.99 Enter a quantity and
Junior .5 GPM Pressure Compensating Aerator Insert 10-2650 Junior Size Insert
Pressure Compensating - With 1 washer each for male or female housings		 Spray Stream $2.26  N/A  Enter a quantity and
Junior .5 GPM Pressure Compensating Silicone-Tipped Aerator Insert 13-7650 Junior Size Insert
Pressure Compensating - Silicone Tip - With 1 washer each for male or female housings		 Spray Stream $2.38  N/A  Enter a quantity and
Junior .5 GPM Antimicrobial Pressure Compensating Aerator Insert 14-0650 Junior Size Insert
Pressure Compensating - Antimicrobial - With 1 washer each for male or female housings		 Spray Stream $2.64  N/A  Enter a quantity and
Junior .5 GPM Pressure Compensating Aerator Insert 14-8650 Junior Size Insert
Pressure Compensating - With 1 washer each for male or female housings		 Laminar Stream $2.71  N/A  Enter a quantity and
Regular .5 GPM Pressure Compensating Slim Spray® Aerator Insert 16-0320-5 Junior Size Insert
Pressure Compensating - 		Slim Spray® Stream $4.02 $1.54 Enter a quantity and
Tom Thumb® .5 GPM Pressure Compensating Aerator Insert 10-2950 Tom Thumb® Size Insert
Pressure Compensating - With 1 washer each for male or female housings		 Spray Stream $4.64  N/A  Enter a quantity and
Tom Thumb® .5 GPM Pressure Compensating Aerator Insert 14-8950 Tom Thumb® Size Insert
Pressure Compensating - With 1 washer each for male or female housings		 Laminar Stream $4.96  N/A  Enter a quantity and
Order 6 or more of the same item for greater savings!
Or order 50 or more of the same item for even greater savings!!!
Pricing discounts will be shown in the shopping cart.

Low Flow 1.0 GPM Aerator Inserts
(approximately 3.75 seconds to fill 8oz glass)

WaterSense drop WaterSense Certified
Example Description Stream Aerator Installation Key
Regular 1.0 GPM Pressure Compensating Aerator Insert 10-7350 Regular Size Insert
Pressure Compensating - With 1 washer each for male or female housings		 Spray Stream $1.21  N/A  Enter a quantity and
Regular 1.0 GPM Pressure Compensating Silicone-Tipped Aerator Insert 31-6350 Regular Size Insert
Pressure Compensating - Silicone Tip - With 1 washer each for male or female housings		 Rain Spray Stream $5.69  N/A  Enter a quantity and
Regular 1.0 GPM Pressure Compensating Aerator Insert 11-7350 Regular Size Insert
Pressure Compensating - With 1 washer each for male or female housings		 Aerated Stream $1.53  N/A  Enter a quantity and
Regular 1.0 GPM Pressure Compensating Screenless Silicone-Tipped Aerator Insert 14-4350 Regular Size Insert
Pressure Compensating - Screenless Cascade® Construction - Silicone Tip - With 1 washer each for male or female housings		 Aerated Stream $3.96  N/A  Enter a quantity and
Regular 1.0 GPM Pressure Compensating Aerator Insert 11-8350 Regular Size Insert
Pressure Compensating - With 1 washer each for male or female housings		 Laminar Stream $1.72  N/A  Enter a quantity and
Regular 1.0 GPM Pressure Compensating Mikado® Aerator Insert 33-2350 Regular Size Insert
Pressure Compensating - With 1 washer each for male or female housings		 Mikado® Stream $3.28  N/A  Enter a quantity and
Regular 1.0 GPM Pressure Compensating Slim Spray® Aerator Insert 16-0210-5 Regular Size Insert
Pressure Compensating - 		Slim Spray® Stream $4.00 $0.99 Enter a quantity and
Regular 1.0 GPM Antimicrobial Pressure Compensating Screenless Aerator Insert 31-3350 Regular Size Insert
Pressure Compensating - Antimicrobial - Screenless Cascade® Construction - With 1 washer each for male or female housings		 Laminar Stream $3.54  N/A  Enter a quantity and
Junior 1.0 GPM Pressure Compensating Aerator Insert 10-7650 Junior Size Insert
Pressure Compensating - With 1 washer each for male or female housings		 Spray Stream $1.88  N/A  Enter a quantity and
Junior 1.0 GPM Pressure Compensating Aerator Insert 11-7650 Junior Size Insert
Pressure Compensating - With 1 washer each for male or female housings		 Aerated Stream $1.90  N/A  Enter a quantity and
Junior 1.0 GPM Pressure Compensating Aerator Insert 11-8650 Junior Size Insert
Pressure Compensating - With 1 washer each for male or female housings		 Laminar Stream $2.14  N/A  Enter a quantity and
Regular .35 GPM Pressure Compensating Slim Spray® Aerator Insert 16-0330-5 Junior Size Insert
Pressure Compensating - 		Slim Spray® Stream $3.95 $1.54 Enter a quantity and
Tom Thumb® 1.0 GPM Pressure Compensating Aerator Insert 11-7950 Tom Thumb® Size Insert
Pressure Compensating - With 1 washer each for male or female housings		 Aerated Stream $3.84  N/A  Enter a quantity and
Tom Thumb® 1.0 GPM Pressure Compensating Aerator Insert 11-8950 Tom Thumb® Size Insert
Pressure Compensating - With 1 washer each for male or female housings		 Laminar Stream $3.22  N/A  Enter a quantity and
Order 6 or more of the same item for greater savings!
Or order 50 or more of the same item for even greater savings!!!
Pricing discounts will be shown in the shopping cart.

California Economy Flow 1.2 GPM Aerator Inserts
(approximately 3.13 seconds to fill 8oz glass)

WaterSense drop WaterSense Certified
Example Description Stream Aerator
Regular 1.2 GPM Pressure Compensating Silicone-Tipped Adjustable Stream Aerator Insert 17-2350 Regular Size Insert
Pressure Compensating - Adjustable Stream Angle - Silicone Tip - With 1 washer each for male or female housings		 Rain Spray Swivel Stream $5.68 Enter a quantity and
Regular 1.2 GPM Pressure Compensating Aerator Insert 14-5350 Regular Size Insert
Pressure Compensating - With 1 washer each for male or female housings		 Aerated Stream $1.76 Enter a quantity and
Regular 1.2 GPM Pressure Compensating Auto Clean Aerator Insert 16-1350 Regular Size Insert
Pressure Compensating - Auto Clean - With 1 washer each for male or female housings		 Aerated Stream $2.77 Enter a quantity and
Regular 1.2 GPM Pressure Compensating Adjustable Stream Aerator Insert 16-2350 Regular Size Insert
Pressure Compensating - Adjustable Stream Angle - With 1 washer each for male or female housings		 Aerated Swivel Stream $1.66 Enter a quantity and
Regular 1.2 GPM Pressure Compensating Screenless Silicone-Tipped Aerator Insert 16-4350 Regular Size Insert
Pressure Compensating - Screenless Cascade® Construction - Silicone Tip - With 1 washer each for male or female housings		 Aerated Stream $2.59 Enter a quantity and
Regular 1.2 GPM Pressure Compensating Aerator Insert 17-1350 Regular Size Insert
Pressure Compensating - With 1 washer each for male or female housings		 Laminar Stream $1.89 Enter a quantity and
Regular 1.2 GPM Antimicrobial Pressure Compensating Screenless Aerator Insert 16-9350 Regular Size Insert
Pressure Compensating - Antimicrobial - Screenless Cascade® Construction - With 1 washer each for male or female housings		 Laminar Stream $4.77 Enter a quantity and
Regular 1.2 GPM Pressure Compensating Mikado® Aerator Insert 32-4350 Regular Size Insert
Pressure Compensating - With 1 washer each for male or female housings		 Mikado® Stream $3.29 Enter a quantity and
Junior 1.2 GPM Pressure Compensating Aerator Insert 14-5650 Junior Size Insert
Pressure Compensating - With 1 washer each for male or female housings		 Aerated Stream $1.88 Enter a quantity and
Junior 1.2 GPM Pressure Compensating Aerator Insert 17-1650 Junior Size Insert
Pressure Compensating - With 1 washer each for male or female housings		 Laminar Stream $1.52 Enter a quantity and
Tom Thumb® 1.2 GPM Pressure Compensating Aerator Insert 14-5950 Tom Thumb® Size Insert
Pressure Compensating - With 1 washer each for male or female housings		 Aerated Stream $3.85 Enter a quantity and
Tom Thumb® 1.2 GPM Pressure Compensating Aerator Insert 17-1950 Tom Thumb® Size Insert
Pressure Compensating - With 1 washer each for male or female housings		 Laminar Stream $5.43 Enter a quantity and
Order 6 or more of the same item for greater savings!
Or order 50 or more of the same item for even greater savings!!!
Pricing discounts will be shown in the shopping cart.

Economy Flow 1.5 GPM Aerator Inserts
(approximately 2.5 seconds to fill 8oz glass)

WaterSense drop WaterSense Certified
Example Description Stream Aerator
Regular 1.5 GPM Pressure Compensating Silicone-Tipped Aerator Insert 31-7350 Regular Size Insert
Pressure Compensating - Silicone Tip - With 1 washer each for male or female housings		 Rain Spray Stream $4.97 Enter a quantity and
Regular 1.5 GPM Aerator Insert 10-6350 Regular Size Insert
With 1 washer each for male or female housings		 Aerated Stream $1.13 Enter a quantity and
Regular 1.5 GPM Screenless Silicone-Tipped Aerator Insert 13-2350 Regular Size Insert
Screenless Cascade® Construction - Silicone Tip - With 1 washer each for male or female housings		 Aerated Stream $1.91 Enter a quantity and
Regular 1.5 GPM Pressure Compensating Aerator Insert 11-1350 Regular Size Insert
Pressure Compensating - With 1 washer each for male or female housings		 Aerated Stream $1.53 Enter a quantity and
Regular 1.5 GPM Pressure Compensating Auto Clean Aerator Insert 30-6350 Regular Size Insert
Pressure Compensating - Auto Clean - With 1 washer each for male or female housings		 Aerated Stream $2.76 Enter a quantity and
Regular 1.5 GPM Pressure Compensating Adjustable Stream Aerator Insert 30-1350 Regular Size Insert
Pressure Compensating - Adjustable Stream Angle - With 1 washer each for male or female housings		 Aerated Swivel Stream $1.92 Enter a quantity and
Regular 1.5 GPM Pressure Compensating Screenless Silicone-Tipped Aerator Insert 12-4350 Regular Size Insert
Pressure Compensating - Screenless Cascade® Construction - Silicone Tip - With 1 washer each for male or female housings		 Aerated Stream $2.37 Enter a quantity and
Regular 1.5 GPM Aerator Insert 12-8350 Regular Size Insert
With 1 washer each for male or female housings		 Laminar Stream $1.37 Enter a quantity and
Regular 1.5 GPM Pressure Compensating Aerator Insert 11-3350 Regular Size Insert
Pressure Compensating - With 1 washer each for male or female housings		 Laminar Stream $2.88 Enter a quantity and
Regular 1.5 GPM Antimicrobial Pressure Compensating Screenless Aerator Insert 12-0350 Regular Size Insert
Antimicrobial - Screenless Cascade® Construction - With 1 washer each for male or female housings		 Laminar Stream $4.15 Enter a quantity and
Junior 1.5 GPM Aerator Insert 10-6650 Junior Size Insert
With 1 washer each for male or female housings		 Aerated Stream $1.27 Enter a quantity and
Junior 1.5 GPM Pressure Compensating Aerator Insert 11-1650 Junior Size Insert
Pressure Compensating - With 1 washer each for male or female housings		 Aerated Stream $1.64 Enter a quantity and
Junior 1.5 GPM Aerator Insert 12-8650 Junior Size Insert
With 1 washer each for male or female housings		 Laminar Stream $1.80 Enter a quantity and
Junior 1.5 GPM Pressure Compensating Aerator Insert 11-3650 Junior Size Insert
Pressure Compensating - With 1 washer each for male or female housings		 Laminar Stream $1.44 Enter a quantity and
Tom Thumb® 1.5 GPM Pressure Compensating Aerator Insert 11-1950 Tom Thumb® Size Insert
Pressure Compensating - With 1 washer each for male or female housings		 Aerated Stream $4.41 Enter a quantity and
Tom Thumb® 1.5 GPM Pressure Compensating Aerator Insert 11-3950 Tom Thumb® Size Insert
Pressure Compensating - With 1 washer each for male or female housings		 Laminar Stream $4.97 Enter a quantity and
Order 6 or more of the same item for greater savings!
Or order 50 or more of the same item for even greater savings!!!
Pricing discounts will be shown in the shopping cart.

Clinic Perlator® 1.5 GPM Aerator Inserts
(approximately 2.5 seconds to fill 8oz glass)

WaterSense drop WaterSense Certified
Neoperl Clinic Perlator Aerators

Laminar flow devices are often the aerator of choice for medical facilities, thanks to the bacteria-preventing qualities of their 100% water stream. But even the most effective of inserts require frequent maintenance and replacement, especially in the sensitive surroundings of a clinic. The Clinic Perlator® series is designed to help streamline the easily forgotten maintenance of one of the most important fixtures of a medical office: the faucet. Available in four vibrant colors, these inserts serve as a colorful reminder of when each faucet's aerator was last serviced, allowing facility maintenance staff to know at a glance if action needs to be taken.

Looking for even more bacteria-fighting power? We also offer a variety of antimicrobial aerators!
Example Description Stream Aerator
Regular 1.5 GPM Blue Clinic Perlator® Aerator Insert 19-2350 Regular Size Insert
Blue Clinic Perlator® - With 1 washer each for male or female housings		 Laminar Stream $1.30 Enter a quantity and
Regular 1.5 GPM Green Clinic Perlator® Aerator Insert 19-3350 Regular Size Insert
Green Clinic Perlator® - With 1 washer each for male or female housings		 Laminar Stream $1.30 Enter a quantity and
Regular 1.5 GPM Red Clinic Perlator® Aerator Insert 19-1350 Regular Size Insert
Red Clinic Perlator® - With 1 washer each for male or female housings		 Laminar Stream $1.30 Enter a quantity and
Regular 1.5 GPM Yellow Clinic Perlator® Aerator Insert 19-0350 Regular Size Insert
Yellow Clinic Perlator® - With 1 washer each for male or female housings		 Laminar Stream $1.30 Enter a quantity and
Order 6 or more of the same item for greater savings!
Or order 50 or more of the same item for even greater savings!!!
Pricing discounts will be shown in the shopping cart.

California Standard Flow 1.8 GPM Aerator Inserts
(approximately 2.1 seconds to fill 8oz glass)

Example Description Stream Aerator
Regular 1.8 GPM Pressure Compensating Silicone-Tipped Aerator Insert 31-8350 Regular Size Insert
Pressure Compensating - Silicone Tip - With 1 washer each for male or female housings		 Rain Spray Stream $4.97 Enter a quantity and
Regular 1.8 GPM Aerator Insert 11-6350 Regular Size Insert
With 1 washer each for male or female housings		 Aerated Stream $1.00 Enter a quantity and
Regular 1.8 GPM Pressure Compensating Aerator Insert 11-5350 Regular Size Insert
Pressure Compensating - With 1 washer each for male or female housings		 Aerated Stream $1.53 Enter a quantity and
Regular 1.8 GPM Pressure Compensating Aerator Insert 14-9350 Regular Size Insert
Pressure Compensating - With 1 washer each for male or female housings		 Laminar Stream $3.05 Enter a quantity and
Junior 1.8 GPM Aerator Insert 11-6650 Junior Size Insert
With 1 washer each for male or female housings		 Aerated Stream $1.10 Enter a quantity and
Junior 1.8 GPM Pressure Compensating Aerator Insert 11-5650 Junior Size Insert
Pressure Compensating - With 1 washer each for male or female housings		 Aerated Stream $1.65 Enter a quantity and
Junior 1.8 GPM Pressure Compensating Aerator Insert 14-9650 Junior Size Insert
Pressure Compensating - With 1 washer each for male or female housings		 Laminar Stream $2.68 Enter a quantity and
Tom Thumb® 1.8 GPM Pressure Compensating Aerator Insert 11-5950 Tom Thumb® Size Insert
Pressure Compensating - With 1 washer each for male or female housings		 Aerated Stream $4.39 Enter a quantity and
Order 6 or more of the same item for greater savings!
Or order 50 or more of the same item for even greater savings!!!
Pricing discounts will be shown in the shopping cart.

Standard Flow 2.2 GPM Aerator Inserts
(approximately 1.7 seconds to fill 8oz glass)

Example Description Stream Aerator
Regular 2.2 GPM Aerator Insert 10-9350 Regular Size Insert
With 1 washer each for male or female housings
Cannot be shipped to CA, CO, HI, MA, NJ, OR, VT, and WA		 Aerated Stream $2.04 Enter a quantity and
Regular 2.2 GPM Pressure Compensating Aerator Insert 11-2350 Regular Size Insert
Pressure Compensating - With 1 washer each for male or female housings
Cannot be shipped to CA, CO, HI, MA, NJ, OR, VT, and WA		 Aerated Stream $1.75 Enter a quantity and
Junior 2.2 GPM Aerator Insert 10-9650 Junior Size Insert
With 1 washer each for male or female housings
Cannot be shipped to CA, CO, HI, MA, NJ, OR, VT, and WA		 Aerated Stream $1.27 Enter a quantity and
Junior 2.2 GPM Pressure Compensating Aerator Insert 11-2650 Junior Size Insert
Pressure Compensating - With 1 washer each for male or female housings
Cannot be shipped to CA, CO, HI, MA, NJ, OR, VT, and WA		 Aerated Stream $1.88 Enter a quantity and
Tom Thumb® 2.2 GPM Pressure Compensating Aerator Insert 11-2950 Tom Thumb® Size Insert
Pressure Compensating - With 1 washer each for male or female housings
Cannot be shipped to CA, CO, HI, MA, NJ, OR, VT, and WA		 Aerated Stream $3.83 Enter a quantity and
Order 6 or more of the same item for greater savings!
Or order 50 or more of the same item for even greater savings!!!
Pricing discounts will be shown in the shopping cart.

Related Items & Information

Faucet aerators information
Choosing a Faucet Aerator Kitchen Sink Aerators
Regular Size Faucet Aerators junior size faucet aerator
Junior Size Faucet Aerators Low flow faucet aerator
Water Saving Aerators Laminar flow faucet aerator
No-Splash Laminar Flow Aerators Vandal-proof faucet aerator
Vandal Resistant Faucet Aerators Chicago Aerators
Chicago Faucet Aerators Metric Faucet Aerators
Metric Aerators

What is an Aerated Stream?

Aerated Stream

Faucet Aerators introduce air into the water stream to produce a larger, fuller, whiter, softer and non-splashing water stream.
Applications:

  • Residential
  • Office Kitchen

What is a Laminar Stream?

Laminar Stream

Laminar stream straighteners produce a non-aerated, crystal clear and non-splashing water stream.
Applications:

  • Hospital
  • Daycare
  • Patient Care

What is a Spray Stream?

Spray Stream

Spray device is a multiple needle like laminar stream used when the flow rate is to low to provide a full coverage of the hands during washing.
Applications:

  • Public Restroom
  • Hospital Restrooms


Frequently Asked Questions

Q. "I purchased a 1.8 gpm aerator and the packaging itself indicates 1.8 gpm. However, I noticed the aerator product itself has 1.75 gpm impressed into the metal. Which GPM notation is correct?"
A. Technically speaking, the flow rate is 1.75 gpm and has been rounded up to show 1.8 gpm on the packaging. When the state of California enacted The Water Conservation Act of 2009, they were required to reduce water consumption by 20%, reducing their maximum flow from 2.2 gpm to 1.75 gpm. The manufacturer started making their aerators 1.75 gpm to be compliant with California's law. However, California chose to round the 1.75 gpm figure to 1.8 gpm maximum flow rate (and several other states followed suit in reducing their maximum flow rates to match these figures). The manufacturer did not want to confuse their suppliers and opted to label the bag as 1.8 gpm and laser mark the housing as 1.75 gpm, rather than make two entirely different products when there is actually very little variation between them.

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