Best Fuel Tank Sump Kit for Diesel Lift-Pump Setups

#1 · Best Overall

1. FASS SK5501

Best for: FASS return-line installations.

Why it ranks #1: Its return-style design needs no tank drop, uses a single-bolt installation, and specifies a 1⁄2-inch NPT suction port and return port.

FASS’s single-bolt design is the key draw for installers seeking a simpler sump attachment; the kit lowers fuel suction to the tank bottom to address 1/4-tank supply issues. Its return-style configuration also provides a 1/2-inch NPT port for plumbing a FASS return line.

The stated single-hole installation means the tank needs one drilled opening, while the single-bolt design keeps the sump attachment straightforward. A 1/2-inch NPT suction port and 1/2-inch return port give the installer named connection points for suction and return plumbing. FASS says lowering suction to the bottom of the tank helps eliminate 1/4-tank fuel supply problems. At 7 by 6.5 by 5 inches and 3 pounds, its listed dimensions and weight help with planning the installation space.

Skip it if you want to avoid drilling the tank; this return-style kit’s installation calls for a single drilled opening.

This FASS kit suits buyers plumbing a FASS return line and seeking bottom-of-tank suction with a single-bolt attachment. Its one-hole installation is a firm boundary for anyone who does not want to drill the fuel tank.

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

#2 · Established Brand

2. Beans Diesel 280003

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

Best for: Universal dual-port system builds.

Why it ranks #2: This universal dual-port sump is listed for FASS, AirDog, and Fuelab systems and Cummins, Duramax, and Powerstroke applications.

Beans Diesel’s 280003 is identified as a multi-function, dual-port universal sump, with compatibility named for FASS, AirDog, and Fuelab systems. Its application list also includes Cummins, Duramax, and Powerstroke trucks, making it a candidate for buyers selecting a sump around those pump and engine families.

The dual-port description points to a setup with two connection points, while the universal designation and named pump compatibility help buyers consider it across FASS, AirDog, and Fuelab systems. Cummins, Duramax, and Powerstroke applications are also explicitly listed, anchoring the stated engine fit. Beans Diesel specifies aluminum, metal, plastic, and stainless steel among the materials, and gives dimensions of 7.5 by 10.5 by 3 inches. Those measurements are useful when evaluating mounting space before installation.

Skip it if you need the listing to identify included fittings or installation tools before purchase; the supplied details provide no package contents for those items.

The Beans Diesel 280003 is a candidate for buyers seeking a dual-port sump for a named pump and engine family. Use its stated dimensions to assess mounting space, and account for the listing’s unspecified fitting details.

Listed on Amazon as: Multi Function Dual Port Universal Fuel Tank Sump Kit 280003 For FASS/AirDog/Fuelab Compatible with Cummins/Duramax/Powerstroke

#3 · Hole Saw Included

3. ZHSYMX Fuel Tank Sump

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

Best for: Integrated-return diesel truck builds.

Why it ranks #3: It combines a built-in return, no-tank-drop installation, and a supplied 3-inch hole saw; the listing cautions against off-road use.

A built-in fuel return is the defining feature of this ZHSYMX sump, letting installers route return fuel back through the sump rather than add a separate return point. Its no-tank-drop installation and included 3-inch hole saw support a direct installation approach for compatible diesel trucks.

The standpipe separates return fuel from feed, a useful arrangement for lift-pump plumbing, while the built-in return port provides a dedicated route back to the tank. ZHSYMX lists compatibility with Cummins, Duramax, and Powerstroke trucks and says it works with stock and aftermarket tanks, widening its stated application range. The included hole saw supports installation without dropping the tank, but drilling requires care: the listing says the tank must be cleared of debris afterward.

Skip it if you need a sump for off-road driving or a vehicle with potential ground-clearance issues; the listing expressly cautions against those applications.

Choose this ZHSYMX kit for a Cummins, Duramax, or Powerstroke build that needs an integrated return and no-tank-drop installation. Avoid it for off-road use or where the installed sump could create a ground-clearance concern.

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

#4 · Flexible Hose Sizes

4. SMALLFATW Dual-Port Sump

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

Best for: Flexible dual-port diesel plumbing.

Why it ranks #4: Its four brass fittings include 1/2-inch and 5/8-inch hose-ID options, and its dual-port design allows return plumbing or double feed.

Four supplied brass fittings in two hose sizes distinguish the SMALLFATW sump, giving installers options for 1/2-inch or 5/8-inch hose connections. Its dual-port design can route a return line or serve as a double feed, helping adapt fuel plumbing to different lift-pump setups.

The CNC-machined billet aluminum top plate and housing have a black anodized finish described as durable and rust-resistant, supporting a robust tank-mounted assembly. Two 1/2-inch NPT fittings suit 1/2-inch hose ID, while two accommodate 5/8-inch hose ID, offering a choice of line sizes from the included fittings. The listing says the dual ports can take a return line or work as double feed. Compatibility is stated for AirDog, FASS, and similar pumps on Cummins, Duramax, or Powerstroke applications.

Skip it if you need an integrated return and also want both ports dedicated to feed; this kit’s listed port choices divide between return-line and double-feed use.

Pick SMALLFATW if your diesel truck fuel system benefits from dual-port flexibility and a choice of 1/2-inch or 5/8-inch hose ID. Confirm which plumbing arrangement you need: the stated options are return line or double feed.

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

#5

5. waltyotur Dual-Port Sump

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

Best for: Three-bolt dual-port assemblies.

Why it ranks #5: The three-bolt design distributes clamping force around the O-ring, while interchangeable 1/2-inch and 5/8-inch barbs support different fuel-flow setups.

A three-bolt clamp pattern is the waltyotur kit’s clearest distinction: the listing says it distributes pressure around the O-ring to reduce slippage and leaks. Dual ports and interchangeable 1/2-inch and 5/8-inch barbs let installers select a fuel-line size for their setup.

The three-bolt design applies clamping force around the O-ring, a practical detail for keeping the sump seated during installation. Its dual-port arrangement and interchangeable barbs support either 1/2-inch or 5/8-inch line sizing, letting buyers configure the connections around fuel-supply needs. The listing identifies compatibility with AirDog, FASS, Cummins, Duramax, and Powerstroke applications. An Allen wrench and steel drain plug are among the included items, useful details when preparing the installation and later access to the sump.

Skip it if you need a one-bolt installation; this waltyotur sump uses a three-bolt design to clamp around its O-ring.

This waltyotur kit fits buyers who want dual-port plumbing and interchangeable barb sizes for a listed diesel application. Its three-bolt mounting pattern is the key installation consideration, especially when planning access around the tank.

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

#6

6. Generic Integrated Return Sump

• Material: Iron
• Material Type: Iron

Best for: Three-bolt integrated-return installs.

Why it ranks #6: It lists dual ports, a three-bolt O-ring clamping design, and included barbs, drain plug, sealing washers, and Allen wrench.

The Generic HJK-939 uses a three-bolt design that distributes clamping pressure around the O-ring, helping limit slippage and leaks. Its integrated-return, dual-port configuration is aimed at fuel-pickup and flow concerns on compatible Airdog or FASS-equipped Cummins, Duramax, and Powerstroke engines.

Even pressure around the O-ring is the stated purpose of the three-bolt layout, giving installers a defined clamping approach for securing the sump. Dual ports support fuel-line connections, while the integrated return suits return-line routing. The listing says the kit addresses 1/4-tank pickup problems and factory draw-straw issues, or can enhance flow. Included hardware comprises a drain plug, sealing washers, bolts, housing, top plate, Allen wrench, and four hose-ID barbs, supporting preparation for assembly.

Skip it if you specifically need an aluminum-bodied sump; this HJK-939 is listed with an iron housing.

This HJK-939 suits buyers seeking a three-bolt, dual-port sump with integrated return for the named diesel engines and pump systems. Its listed iron housing is the material boundary to weigh for your build.

Listed on Amazon as: Diesel Fuel Tank Gas Integrated Return Sump Kit, Dual-Port Fuel Tank Sump Replacement, Compatible with Airdog FASS Cummins Duramax Powerstroke, Integrated Return

#7

7. USHDHDID Dual-Port Sump

• Material: Aluminum
• Compatible with Vehicle Type: Truck

Best for: Dual-port diesel return routing.

Why it ranks #7: Its dual-port integrated-return layout targets FASS and AirDog systems and the listing states a 24-month manufacturer warranty.

Two integrated ports give the USHDHDID sump flexibility for fuel-line routing, while its integrated-return design serves buyers connecting a return line at the tank. The listing targets AirDog and FASS pumps and Cummins, Duramax, and Powerstroke engines, alongside low-level pickup concerns.

The dual-port arrangement supports flexible installation, and the integrated-return feature provides a route for return plumbing at the sump. USHDHDID says the kit addresses pickup problems near a 1/4 tank to maintain fuel flow when the tank is nearly empty. Its aluminum body gives a named construction material, and the stated 24-month warranty is additional product information for buyers weighing ongoing ownership. Compatibility is specifically listed for aftermarket AirDog and FASS pumps and the named diesel engine families.

Skip it if you need a sump for an application beyond the diesel trucks and engine families named in this listing; its stated fit centers on those uses.

Choose USHDHDID for a listed diesel truck setup needing dual-port return routing and low-level fuel pickup. Its stated compatibility centers on AirDog, FASS, Cummins, Duramax, and Powerstroke applications.

Listed on Amazon as: Premium Fuel Tank Sump Kit Diesel & General Use Compatible with Diesel Truck Airdog FASS Cummins Duramax Powerstroke Dual-Port Integrated Return

#8

8. 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 setups.

Why it ranks #8: The listing specifies 6061-T6 aluminum and compatibility with Airdog, FASS, Cummins, Powerstroke, and Duramax applications.

A sediment-collection feature distinguishes this sixcow sump, with the listing saying it reduces sediment flowing toward the fuel filter. Its 6061-T6 aluminum construction and stated compatibility with high-flow AirDog, FASS, and Fuelab pumps target demanding diesel and gas engine applications.

The sump’s sediment collection feature addresses debris in the fuel path by reducing the amount that reaches the filter, a maintenance consideration for owners concerned about filter loading. Sixcow says the unit lets users draw fuel from the tank’s last remaining portion and helps avoid air being drawn when the tank is not full or a fuel tube is broken. The 6061-T6 aluminum specification identifies the housing material, while stated compatibility spans AirDog, FASS, Fuelab, Cummins, Duramax, and Powerstroke applications.

Skip it if you need specified return ports or included installation tools; the supplied sixcow package details identify one sump kit only.

This sixcow sump suits buyers prioritizing sediment collection for a listed high-flow pump setup across diesel or gas applications. Its stated package is one sump kit, so plan separately for any additional fittings or installation tools your setup requires.

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

#9

9. ADsunves Dual-Port Sump

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

Best for: Integrated-return pump plumbing.

Why it ranks #9: Its dual-port integrated-return design is intended for AirDog and FASS systems, but the supplied details omit fitting sizes and installation hardware.

The ADsunves kit combines dual ports with an integrated return, a useful distinction for buyers routing both supply and return connections through one sump. Its listing says the pickup draws from the tank’s lowest point to address 1/4-tank starvation during acceleration, climbing, or heavy loads.

Drawing fuel from the lowest point is intended to maintain a steady supply when fuel levels are low, and the listing specifically connects this to acceleration, climbs, and heavy loads. The dual-port integrated-return construction gives the installer both supply and return functionality in the sump. ADsunves names AirDog and FASS systems as compatible, making the kit relevant to those lift-pump installations. The stated dimensions are 4 by 2 by 4 inches, which can help buyers consider available mounting space before beginning the work.

Skip it if you do not have room for a 4-by-2-by-4-inch sump at the planned mounting location; this kit’s stated dimensions set that space requirement.

Consider ADsunves for an AirDog or FASS installation that needs integrated return plumbing and low-level fuel pickup. Its 4-by-2-by-4-inch listed dimensions make available space an important installation boundary.

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

#10

10. Qqrchontics Fuel Tank Sump

• Compatible with Vehicle Type: Truck

Best for: Lift-pump kits with hole saw.

Why it ranks #10: It lists a 3-inch hole saw and 1/2-inch fittings, but the supplied description is incomplete, leaving return design and material details unclear.

An included 3-inch hole saw sets this Qqrchontics kit apart for buyers preparing a bottom-mounted pickup installation. The kit is listed for FASS and AirDog lift-pump systems and Cummins, Duramax, and Power Stroke applications, with 1/2-inch fittings supplied for fuel-line connections.

The dedicated bottom-mounted connection point gives aftermarket lift-pump plumbing a defined pickup location, while the stated FASS and AirDog compatibility targets common diesel lift-pump setups. Including the 3-inch hole saw puts a specified installation tool in the package, and the 1/2-inch fittings provide connection hardware for the fuel line. Qqrchontics describes the kit as a way to simplify fuel-line routing. Buyers should account for the tank opening required by the supplied hole saw when planning installation.

Skip it if you want to install a sump without cutting a 3-inch tank opening; this kit’s included hole saw is specified for that installation.

Choose Qqrchontics if your FASS or AirDog lift-pump project calls for a bottom pickup and you value the included hole saw and 1/2-inch fittings. Plan around its specified 3-inch tank opening.

Listed on Amazon as: Fuel Tank Sump Kit for Diesel Trucks, Compatible with FASS and AirDog Lift Pump Systems, with Integrated Return & Hole Saw, for Cummins/ Duramax /Power Stroke Applications