Diesel Exhaust Fluid Equipment

Clean emissions, reliable dispensing, and compliant storage built for real-world fueling operations.

Diesel Exhaust Fluid (DEF) is a precisely blended solution, 32.5% high-purity urea and 67.5% deionized water, used in selective catalytic reduction (SCR) systems to reduce NOₓ emissions from diesel engines. For fleets, retail fuel sites, and industrial operations, getting DEF handling right is about more than compliance; it’s about protecting equipment, maintaining fuel-island uptime, and ensuring product purity from bulk storage to the nozzle.

Northwest Pump designs and supplies end-to-end DEF systems: storage, transfer, pumping, dispensing, monitoring, and accessories. With more than 65 years serving petroleum and industrial markets, we help you size, specify, install, and maintain DEF systems that are efficient, reliable, and ISO 22241–aligned.

DEF Pumps and Pump Systems

 

Variations of standalone DEF pumps as well as complete DEF pump systems

Products include:

• 115v pumps
• 12v pumps
• Diaphragm pumps
• Centrifugal pumps
• Manual pumps

DEF Storage

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Wide range of DEF storage as well as shelters

Products include:

• Drum storage tanks
• Tote storage tanks
• Mini-Bulk storage
• Aboveground poly tanks
• Belowground fiberglass tanks
• Shelters

Portable Dispensing Units

 

Complete mobile solutions to your on-road and off-road dispensing needs. PDUs include everything you’ll need: a pump, hose, and nozzle

Products include:

• Rugged all-poly housings
• Powder-coated steel housings
• 33 – 158 gallon capacities
• Lockable and forkliftable
• Heated models available

DEF Pump Packages

 

Several combinations of complete packages for storing and dispensing DEF

Products include:

• Drum pump packages
• Tote pump packages
• Pump options
• Nozzle options
• Meter options

Transfer Packages

 

We offer multiple variations of transfer system packages

Products include:

• Skid transfer packages
• Cart transfer packages
• Meter options

Accessories

 

Offers a complete line of accessories for DEF storage and dispensing

Products include:

• Auto and manual nozzles
• Stainless steel and poly nozzles
• Meters
• Hose reels
• Stainless steel and polyfill valves
• Stainless steel and poly dispense couplers
• Downtubes

DEF Dispensers

 

Products include:

• Retail dispensers
• Commercial dispenser

Sherman Mini Bulk DEF Tank Packages

Sherman Roto Tank has developed a family of Insulated “Yankee” and non-insulated “Rebel” DEF tank systems designed to provide end-users with superior quality and service. The Mini bulks are custom designed and built to your specifications.

Sherman Roto Tank brings over 10 years of experience in building tank systems that fit the needs of the customer. The DEF tanks systems are designed to offer the customer unparalleled features and benefits coupled with superior quality and customer service.

550 Gallon Mini

• 550, 675+, and 1000 gallon Mini Bulks configured with all ISO 22241 components
• Non-insulated Mini Bulk is suitable for warm weather climates
• Wide variety of options

1,000 Gallon Mini Bulk

• Micro Matic RSV or RPV closed systems
• Anova FTM GPS liquid levels sensing
• Piusi DEF family of pumps and dispensers

675+ Gallon Mini Bulk

• 550, 675+, and 1000 gallon
• Mini Bulksconfigured with all ISO 22241 components
• Insulated Mini Bulk is suitable for warm and cold weather climates
• Wide variety of options

What DEF Equipment Does

• Protects SCR Systems: Properly stored and dispensed DEF prevents contamination that can damage OEM emissions equipment and trigger fault codes.
• Preserves Product Quality: Closed systems, compatible materials, and correct filtration keep DEF on-spec through every transfer.
• Minimizes Downtime: Purpose-built pumps, heated lines/shelters, and robust metering keep sites operational in hot and cold environments.
• Supports Compliance: Equipment choices aligned to ISO 22241 help maintain purity standards from bulk tank to vehicle.

DEF freezes at ~12°F (−11°C) and thaws without performance loss if purity is maintained. Good system design plans for both freeze protection and summer heat.

Core DEF System Building Blocks

1) Pumps & Transfer: Electric (115V, 12V), diaphragm and centrifugal options, and manual pumps for backup—matched to flow requirements and duty cycle.

2) Storage: Aboveground poly, belowground fiberglass, totes and drums, mini-bulk, plus insulated/heated options to protect quality and uptime.

3) Dispensing: Retail and commercial dispensers, PDUs (portable dispensing units) for mobile fleets, and packaged solutions for drums/totes.

4) Monitoring & Metering: Accurate meters, level sensing, and controls for inventory visibility and loss prevention.

5) Accessories: ISO-compatible nozzles and couplers, hose reels, valves, downtubes, and filtration to complete a closed, clean system.

Selecting the Right DEF Pumping and Dispensing Setup

Match flow to application:

• Retail/High-throughput: Fixed dispensers and mini-bulk tanks with accurate metering and robust hose management.
• Commercial/Fleet yards: Durable commercial dispensers or PDUs sized to fleet fueling patterns.
• Shop/bay service: Tote/drum pump packages with closed couplers and short hose runs to minimize exposure.

Plan for growth: Size tanks, power, and pad space for future throughput. It’s more cost-effective to stub for expansion now than rebuild a forecourt later.

Think serviceability: Choose components with local parts support and straightforward maintenance (gaskets, seals, meters).

Monitoring, Metering, and Inventory Visibility

From retail sites to fleet yards, accurate metering supports reconciliation, billing, and environmental accountability. For remote tanks, telemetry and level sensors help plan deliveries, avoid run-outs, and spot anomalies quickly (e.g., sudden level changes indicating a leak or theft).

FAQs: Diesel Exhaust Fluid Equipment

What causes DEF contamination and how do we prevent it?

Most quality issues come from incompatible materials, open transfers, and shared equipment. Use ISO-compatible materials, closed couplers, DEF-only hoses/nozzles, and labeled components to keep product on-spec.

Do we need heated tanks or lines for DEF?

If you operate where temps reach ~12°F (−11°C) or below, consider insulated/heated tanks, cabinets, and lines. Heated PDUs protect mobile fueling in winter.

What’s the difference between retail and commercial DEF dispensers?

Retail dispensers integrate POS, metering/EMV features, and customer-facing interfaces. Commercial dispensers prioritize durability, authorization, and fleet controls for yard or private network fueling.

How do PDUs (Portable Dispensing Units) help fleet operations?

PDUs bring on-spec DEF to wherever equipment is—reducing deadhead time and keeping off-road assets productive. Options include heated enclosures and multiple capacity ranges.

How big should our DEF tank be?

Start with 30–60 days of demand as a baseline, then factor delivery cadence, site growth, and seasonal weather. Our team will help you right-size capacity and plan for expansion.

Why Northwest Pump for DEF Systems

• Proven experience since 1959: Design, equipment, and lifecycle support for fueling operations across the West.
• Top-tier vendor partners: Access to retail and commercial dispensers, mini-bulk tanks, PDUs, meters, and ISO-compatible accessories from trusted manufacturers.
• Safety and compliance focus: Systems aligned to best practices for ISO 22241, electrical codes, and cold-weather operation.
• Relentless Service & Partnership: Local teams, responsive support, and long-term relationships that keep your sites running.

Ready to Modernize Your DEF Setup?

If your site is dealing with frozen nozzles, slow flow, recurring meter issues, or contamination alarms, it may be time to upgrade. Northwest Pump designs DEF systems that protect product quality, improve uptime, and simplify operations, from bulk storage and transfer to accurate dispensing and monitoring.

Next Steps:

Reach out to our sales team for more information by emailing us at sales@nwpump.com, call 1-800-452-PUMP, or find the nearest location.