Multiquip H216170 DEF Tank Vent Fitting

The Multiquip H216170 is a genuine OEM DEF Tank Vent Fitting designed for the DCA-series Ultra-Silent diesel generators, including DCA70SSJU4F, DCA150SSJU4F, DCA180SSJU4F, DCA220SSJU4F, and DCA300SSJU4F models. As a direct Multiquip OEM part, H216170 is manufactured to the same specification as the original component installed at the factory, ensuring a correct fit without modification. DHS Equipment sources this part directly through authorized channels so you receive an authentic replacement every time.

Key Features

• Genuine OEM Construction — Manufactured to the same material and dimensional specification as the original DEF tank vent fitting, ensuring proper venting pressure and chemical compatibility with diesel exhaust fluid.
• Drop-In Installation — Engineered to match the original port geometry and thread specification on the DEF tank, connecting directly without rework or adapter fittings.
• Broad DCA-Series Coverage — Confirmed fitment across DCA70SSJU4F, DCA150SSJU4F, DCA180SSJU4F, DCA220SSJU4F, and DCA300SSJU4F Ultra-Silent generator models and their variants.
• Maintains DEF System Integrity — A properly functioning vent fitting allows the DEF tank to breathe correctly during fill and draw cycles, preventing pressure buildup or vacuum lock that can disrupt SCR system dosing.
• Emissions System Compliance — Correct DEF tank venting is critical to Tier 4 Final emissions compliance; a failed or blocked vent fitting can trigger fault codes and force the generator into derate or shutdown mode.

The DEF tank vent fitting allows the diesel exhaust fluid reservoir to equalize pressure as fluid is consumed and the tank is refilled, preventing vacuum buildup that can restrict fluid flow to the selective catalytic reduction (SCR) system. When this fitting becomes blocked, cracked, or fails, the DEF pump may be starved of fluid or the tank may pressurize incorrectly, disrupting the emissions control system and potentially causing the generator to derate or shut down. Replacing a worn or damaged vent fitting promptly keeps the SCR system operating as designed and the machine running at full rated output.

Part Details

Compatibility & Fitment

Verify Before You Order

Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.

Why Buy From DHS Equipment

Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.

Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.