Best Sump For Fuel Tank: Diesel Truck Options Compared

#1 · Best Overall

1. FASS SK5501 Sump Kit

Best for: Single-bolt FASS return routing.

Why it ranks #1: Its single-bolt design lowers suction to the tank bottom, and the return-style kit includes a 1⁄2-inch NPT return port and suction port.

FASS's single-bolt design and no-tank-drop installation are the defining conveniences of the SK5501 sump. It lowers the fuel suction location to the tank bottom to address quarter-tank supply issues, while its 1/2-inch NPT return port allows a FASS return line to be routed into the sump.

The listing says installation requires drilling a single hole in the fuel tank, and the single-bolt design is intended to simplify mounting. Lowering suction to the tank bottom targets fuel-supply problems when the tank is around a quarter full. The return-style configuration adds a 1/2-inch NPT port for plumbing the FASS return line directly to the sump. That setup is specifically useful for buyers assembling a FASS system and planning both suction and return routing.

Skip it if you need a stated dual-port or double-feed setup; SMALLFATW TOOLS-012 lists dual-port use for return or double feed.

This fits a FASS system owner seeking bottom-of-tank suction and a direct return-line route without dropping the tank. Its stated return-style configuration is the boundary for buyers who need a different port arrangement.

Listed on Amazon as: FASS Diesel Fuel Tank Sump Kit SK5501 by FASS

#2 · Best Built-In Return

2. ZHSYMX Fuel Tank Sump

• Material: Stainless Steel
• Compatible with Vehicle Type: Truck
• Material Type: Stainless Steel

Best for: Integrated-return diesel truck setup.

Why it ranks #2: The built-in return and stand pipe separate return fuel from feed, and its listed package includes a 3-inch hole saw.

A built-in fuel return is the defining feature of this ZHSYMX sump, giving diesel-truck owners a route to send return fuel back to the tank through the sump. Its stand pipe separates return fuel from feed, while the kit is listed for Cummins, Duramax, and Powerstroke applications.

The no-tank-drop installation can simplify access compared with a setup that requires lowering the tank, and the included 3-inch hole saw supplies a stated installation tool. The stand pipe separates return fuel and feed, while the built-in return provides a dedicated route back into the tank. Its listed compatibility includes stock and aftermarket tanks and Cummins, Duramax, and Powerstroke trucks. The manufacturer cautions against off-road use and vehicles with ground-clearance concerns.

Skip it if you need an off-road installation or have limited ground clearance; the listing warns against both applications.

This suits a Cummins, Duramax, or Powerstroke owner seeking an integrated return and a no-tank-drop installation. Check the ground-clearance limitation before choosing it, and take care to remove debris after drilling the tank.

Listed on Amazon as: Fuel Tank Sump kit For Diesel Truck AirDog FASS

#3 · Best Standpipe Design

3. Tektall Integrated Return Sump

• Material: Aluminum
• Compatible with Vehicle Type: Truck
• Material Type: Aluminum

Best for: Sealed integrated-return truck sump.

Why it ranks #3: This no-tank-drop design has an integrated return, stand pipe, dual O-ring seal, and included 3-inch hole saw; it cautions against low-clearance use.

A built-in return paired with a stand pipe separates return fuel from feed in the Tektall sump, addressing two routing tasks in one assembly. The listing also specifies a dual O-ring seal and no-tank-drop installation, with applications including Dodge, Ford, Duramax, and FASS or AirDog systems.

The stand pipe separates return and feed, while the integrated return provides a route back to the tank; together, these features support a return-style fuel-system layout. Dual O-rings are specified as the sealing arrangement. The included 3-inch hole saw supports the tank-opening step, and no-tank-drop installation can avoid lowering the tank. The listing cautions against off-road use and vehicles with ground-clearance concerns, so the intended truck's operating environment matters.

Skip it if you take the truck off-road or have ground-clearance concerns; the listing explicitly advises against those applications.

This suits a compatible truck owner seeking integrated return routing, separated feed and return, and a hole saw in the kit. Avoid it for off-road use or where the sump could create a ground-clearance concern.

Listed on Amazon as: Fuel Tank Sump w/Integrated Return For for FASS for AirDog for Dodge 5.9 Cummins Ram 2500 W350 for Ford F250 F350 Powerstroke for Duramax for Che-vy

#4 · Best Hose-Size Choice

4. SMALLFATW Dual-Port Sump

• Material: Aluminum,Brass
• Compatible with Vehicle Type: Truck
• Material Type: Aluminum,Brass

Best for: Dual-hose-size return routing.

Why it ranks #4: Four brass fittings include two 1⁄2-inch and two 5⁄8-inch hose-ID options, while the dual-port design supports a return line or double feed.

Four brass fittings in two hose sizes distinguish this SMALLFATW sump, giving installers both 1/2-inch and 5/8-inch hose-ID options. The dual-port design can route a return line or serve as a double feed, and the listing identifies compatibility with AirDog, FASS, Cummins, Duramax, and Powerstroke systems.

The billet aluminum top plate and housing have a black anodized finish, while the brass fittings provide the connection points for the listed hose sizes. That combination gives a buyer options when matching existing fuel plumbing: two fittings suit 1/2-inch hose ID and two suit 5/8-inch ID. The dual-port function can support a return line or double feed for increased fuel flow. The listing also describes addressing quarter-tank fuel pickup issues.

Skip it if you want an included hole saw for tank drilling; SMMS AUTO PARTS Fuel Tank Sump 13 PCS lists a 3-inch hole saw.

This fits a diesel-truck installer who needs flexible return or double-feed plumbing and wants two hose-size choices. Verify that the available fittings match the planned lines; the supplied details do not list a hole saw.

Listed on Amazon as: Fuel Tank Sump Kit for Diesel Truck Dual-Port Integrated Return

#5 · Best Interchangeable Barbs

5. waltyotur Dual-Port Sump

• Material: Aluminum,Brass,Stainless Steel
• Compatible with Vehicle Type: Truck
• Material Type: Aluminum,Brass,Stainless Steel

Best for: Adjustable dual-port fuel supply.

Why it ranks #5: Its dual ports accept interchangeable 1⁄2-inch and 5⁄8-inch barbs, and the three-bolt design distributes clamping force around the O-ring.

Interchangeable 1/2-inch and 5/8-inch barbs make the waltyotur sump notable for adapting its fuel connections to the buyer's supply requirements. Its dual ports are listed for Airdog and FASS applications as well as Cummins, Duramax, and Powerstroke trucks, with a three-bolt design around the O-ring.

The interchangeable barb sizes let the installer select between 1/2-inch and 5/8-inch connections, and the listing says they can be used to increase fuel supply according to requirements. The three-bolt design distributes clamping force around the O-ring to reduce slippage and leaks. Aluminum, brass, and stainless steel are the specified materials. The package also lists an Allen wrench and steel drain plug, useful components to have on hand during fitting and maintenance.

Skip it if you want a hole saw included for installation; ADsunves Fuel Tank Sump Kit lists a precision hole saw.

This suits a diesel-truck owner who needs dual ports and a choice of barb size to match the fuel-supply plan. The supplied details do not list a hole saw, so account for tank drilling separately.

Listed on Amazon as: waltyotur Diesel Fuel Tank Dual-Port Gas Integrated Return Sump Kit

#6

6. SMMS Dual-Port Sump Kit

• Material: Aluminum
• Compatible with Vehicle Type: Truck
• Material Type: Aluminum

Best for: Tool-included dual-port installation.

Why it ranks #6: The aluminum dual-port kit lists a 3-inch hole saw and extra brass, with stated fitment for several diesel truck platforms and lift-pump systems.

A 3-inch hole saw and extra brass come with this SMMS AUTO PARTS dual-port sump kit, helping equip an installation without sourcing those listed items separately. Its stated applications cover Dodge 5.9 Cummins and Ram, Ford Powerstroke, and GM Duramax setups, including AirDog and FASS systems.

The aluminum sump has an oxidized surface described as rust-proof, and the listing says the kit is easy to install. A dual-port layout provides the central fuel-system configuration, while the included hole saw and extra brass add installation components to the package. Listed vehicle applications span several truck families, but the product details direct buyers to a matching-model and OE-number page. Confirming that application information is important before drilling.

Skip it if you need stated fitting hose sizes before plumbing; SMALLFATW TOOLS-012 lists both 1/2-inch and 5/8-inch hose-ID fittings.

This is a fit for truck owners whose listed application matches and who want a dual-port kit with a hole saw and extra brass included. Check the matching model information and fitting requirements before installation.

Listed on Amazon as: SMMS Fuel Tank Sump Diesel Integrated Return Dual-Port Sump Kit with 3" Hole Saw Extra Brass for Ford F250 F350 for Dodge 5.9 Cummins, Ram, 2500 W350 for FASS Airdog Duramax Powerstroke

#7

7. sixcow Fuel Tank Sump

• Material: High quality 6061-T6 aluminum
• Compatible with Vehicle Type: Truck
• Material Type: High quality 6061-T6 aluminum

Best for: Sediment-conscious lift-pump setup.

Why it ranks #7: The 6061-T6 aluminum sump is intended for high-flow lift pumps and lists sediment collection as a feature to reduce sediment reaching the filter.

Sediment collection is the sixcow sump's most distinctive practical feature: the listing says it reduces sediment flowing toward the fuel filter. It is intended for high-flow lift pumps such as AirDog and FASS and lists compatibility with Cummins, Duramax, Powerstroke, and other engines.

The sump is described as allowing use of the tank's last fuel, addressing air suction when the tank is not full or a fuel tube is broken. That function may matter to buyers trying to avoid interrupted lift-pump supply as fuel falls. Its sediment-collection feature separately reduces the amount of sediment reaching the fuel filter. The 6061-T6 aluminum construction and included sump kit are specified, though no installation tool or return-port arrangement is detailed.

Skip it if you need a stated integrated return port or included hole saw; the supplied details do not list either for this kit.

Choose this for a compatible high-flow lift-pump setup where sediment collection and drawing fuel low in the tank are priorities. Its listing does not detail installation tools, so it is a less specific choice for buyers seeking a tool-included kit.

Listed on Amazon as: Fuel Tank Sump Kit for FASS Airdog Fuelab Pump, Compatible with Cummins Powerstroke Duramax Diesel & Gas

#8

8. ADsunves Fuel Tank Sump

• Material: Stainless Steel
• Compatible with Vehicle Type: Truck
• Material Type: Stainless Steel

Best for: Stainless kit with half-inch ports.

Why it ranks #8: This truck sump lists 1⁄2-inch inlet and outlet connections and an included precision hole saw, with stated compatibility for Cummins, Duramax, and Powerstroke.

Stainless-steel construction and specified 1/2-inch inlet and outlet connections give the ADsunves sump a clear materials-and-plumbing profile. The kit is listed for AirDog and FASS integration and for Cummins, Duramax, and Powerstroke engines, with a precision hole saw included for installation.

The included precision hole saw supports the tank-opening step, while the 1/2-inch fittings define the listed connection size for planning fuel lines. Stainless-steel body material supplies the stated construction choice, and the kit is described as an integration option for AirDog and FASS systems. Its listed engine coverage spans Cummins, Duramax, and Powerstroke. The product dimensions are 4.5 by 4.5 by 4 inches, useful when considering storage or available workspace.

Skip it if you require an integrated return port; FASS SK5501 explicitly lists a 1/2-inch NPT return port.

Consider this kit for a compatible diesel truck when stainless construction, 1/2-inch connections, and an included hole saw suit the installation plan. Buyers needing a specified integrated return should choose a listing that names that feature.

Listed on Amazon as: Fuel Tank Sump Kit for Diesel Truck, for AirDog FASS Fuel Tank Mount Kit

#9

9. Viwerel Fuel Tank Sump

• Material: Aluminum, Metal
• Compatible with Vehicle Type: Truck
• Material Type: Aluminum, Metal

Best for: Oxidized-aluminum truck sump.

Why it ranks #9: Its aluminum sump has integrated return in the product description and lists broad diesel truck fitment, but the provided details specify fewer connection particulars.

An oxidized, high-strength aluminum shell distinguishes the Viwerel sump, with the surface described as washable and rust-proof. Its stated fitment spans Cummins 5.9, Ram, Ford Powerstroke, Duramax, and Chevy applications, and the installation instructions describe drilling a 3-inch opening before securing the top plate and shell.

The listed installation sequence calls for drilling a 3-inch hole, placing the top plate through it, then passing bolts through the shell and tightening the assembly. That detail helps buyers understand the tank work involved before beginning. The oxidized aluminum shell is described as durable and easy to install, while the application list covers several truck families. The product is also described as having an integrated return, a relevant feature when planning return-line routing.

Skip it if you want a hole saw included; Tektall DP0267 lists a 3-inch hole saw with its integrated-return sump.

This fits a listed truck application when an oxidized aluminum shell and integrated return match the installation plan. Its instructions specify a 3-inch opening, so arrange the required drilling tool if one is not already available.

Listed on Amazon as: Fuel Tank Sump for Cummins 5.9 for Ram 2500 W350 for Ford F250 F350

#10

10. Competition Engineering C4041

Best for: Weld-in custom tank fabrication.

Why it ranks #10: This universal gas-tank sump has two 1⁄2-inch NPT female fittings, but installation instructions state welding is required, unlike the listed bolt-in diesel options.

Welding is required for the Competition Engineering C4041, making it a fabrication-oriented sump rather than a no-weld installation. Its two 1/2-inch NPT female fittings provide defined plumbing connections, and the included template supports baffling the tank during a custom installation.

The two 1/2-inch NPT female fittings give a fabricator specified connection points for fuel plumbing. Because welding is required, installation involves tank work beyond simply mounting a bolt-on assembly; the included instructions and baffling template support that process. The listing calls this a universal fuel tank sump kit and identifies the C4041 model. Its 14.1-by-8.4-by-6.5-inch package dimensions and 2.4-pound weight are useful planning details for handling and storage.

Skip it if you want a no-weld installation; FASS SK5501 lists a single-bolt design and no-tank-drop installation.

Choose this for a fabricator planning a welded tank sump with two specified NPT connections and a baffling template. It is not suited to an installation plan that excludes welding or tank fabrication work.

Listed on Amazon as: COMP.ENG/MOR Competition Engineering C4041 GAS TANK SUMP, TWO 1/2 IN. NPT FEMALE FITTINGS