Best 10 diesel water separator -Buying Guide

Finding a diesel water separator that suits your need and does its job well can be challenging. Overall, our tester reviews these diesel water separator with giving ratings and marks for its durability, ease of setup and use. Also the diesel water separator price will be fairly matched the product’s performance, plus with the attractive and sturdy design etc that comes with the product. We conducted hands-on testing for diesel water separator and have the details guide and list provided below.

This is the ultimate buyers guide diesel water separator.

The Best diesel water separator

1

R12T Fuel Filter Marine Water Separator Complete Kit Replaces Racor S3240 120AT R12T NPT ZG1/4-19 Fit 1/4 Inch NPT Outboard Motors for Gasoline and Diesel...

9.9

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2

Water Sedimenter Separator Fuel Filter for Isuzu NPR NPR-HD NQR75 8971880421

9.5

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3

Marine R12T Fuel Filter Water Separator Kit - 120AT NPT ZG1/4-19 - Replaces S3240, 18-7947, 187947, 17670-ZW1-030GH, 99105-20006, 9-37812, 120R-RAC01,...

9.3

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4

Marine R12T R12T Fuel Water Separator - 120AT NPT ZG1/4-19 - Replaces S3240, 18-7947, 187947, 17670-ZW1-030GH, 99105-20006, 9-37812, 120R-RAC01, 120R-RAC02...

8.9

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5

iFJF R12T Fuel Water Separator Marine 120AT NPT ZG1/4-19 Automotive Parts with Fitting -Complete Combo Filter Diesel Engine(Includes 2 fittings,2 plugs)

8.9

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6

Racor Gas/Diesel Fuel/Water Separator

8.8

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7

Fuel Filter/Water Separator Diesel Turbine Marine Boat Superior 500FG 500FH

8.6

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8

3/8" NPT Diesel Fuel Filter Water Seperator Hand Primer Pump HANLV 30 Micron

8.6

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9

Dodge Ram 6.7 Liter Diesel Fuel Filter Water Separator Set Mopar OEM

8.3

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10

Upgraded Diesel Fuel Filter marine Water Separator Equivalent 1000 Series to 1000FH 180GPH ｜With Hand Twist Vavle｜Replacement For 2000-2001 Honda CR-V

8.2

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The Best diesel water separator

R12T Fuel Filter Marine Water Separator Complete Kit Replaces Racor S3240 120AT R12T NPT ZG1/4-19 Fit 1/4 Inch NPT Outboard Motors for Gasoline and Diesel...

$19.99 $20.98

in stock

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Amazon price updated: October 4, 2026 8:12 am

Features

Part Number	KFL-R12T
Color	R12T Complete Kit

Water Sedimenter Separator Fuel Filter for Isuzu NPR NPR-HD NQR75 8971880421

$29.50

in stock

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Amazon price updated: October 4, 2026 8:12 am

Features

Part Number

8971880420

Marine R12T Fuel Filter Water Separator Kit - 120AT NPT ZG1/4-19 - Replaces S3240, 18-7947, 187947, 17670-ZW1-030GH, 99105-20006, 9-37812, 120R-RAC01,...

out of stock

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Amazon price updated: October 4, 2026 8:12 am

Features

Part Number	R12TAA
Model	R12TAA
Warranty	2 Year Warranty

iFJF R12T Fuel Water Separator Marine 120AT NPT ZG1/4-19 Automotive Parts with Fitting -Complete Combo Filter Diesel Engine(Includes 2 fittings,2 plugs)

$23.99

in stock

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Amazon price updated: October 4, 2026 8:12 am

Features

Part Number	FJ-R12T
Model	FJ-R12T
Size	R12T Comb

Marine R12T R12T Fuel Water Separator - 120AT NPT ZG1/4-19 - Replaces S3240, 18-7947, 187947, 17670-ZW1-030GH, 99105-20006, 9-37812, 120R-RAC01, 120R-RAC02...

$21.96

in stock

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Amazon price updated: October 4, 2026 8:12 am

Features

Part Number

R12T

Racor Gas/Diesel Fuel/Water Separator

$176.99

in stock

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Amazon price updated: October 4, 2026 8:12 am

Features

Part Number	110A
Model	110A

3/8" NPT Diesel Fuel Filter Water Seperator Hand Primer Pump HANLV 30 Micron

$89.99

in stock

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Amazon price updated: October 4, 2026 8:12 am

Fuel Filter/Water Separator Diesel Turbine Marine Boat Superior 500FG 500FH

$36.92

out of stock

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Amazon price updated: October 4, 2026 8:12 am

Features

Part Number	BN0016-1
Color	Metal Valve
Size	500FH

Dodge Ram 6.7 Liter Diesel Fuel Filter Water Separator Set Mopar OEM

$123.78

in stock

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Amazon price updated: October 4, 2026 8:12 am

Features

Part Number	68157291AA 68197867AA
Model	68157291AA 68197867AA

Upgraded Diesel Fuel Filter marine Water Separator Equivalent 1000 Series to 1000FH 180GPH ｜With Hand Twist Vavle｜Replacement For 2000-2001 Honda CR-V

out of stock

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Amazon price updated: October 4, 2026 8:12 am

Features

Part Number	AP-QLQQ17
Model	AP-QLQQ17
Size	1000FH

The Video Review of Best diesel water separator

Final thoughts

Our best overall diesel water separator, the Perception and the reviews helps assist to choose you the product better. We hope our reviews buyer guide of these diesel water separator will help you pick the perfect diesel water separator for you and your buying decision making.