Castair 284 Gallon Discharge Manifold - 284DM

Castair 284 Gallon Discharge Manifold (284DM)

The Castair 284DM is the discharge manifold designed for the 284-gallon series air receiver systems. If you are running a multi-tank setup or need to split compressed air output from a large receiver to multiple drop lines, this manifold is the connection point that makes it work cleanly. It is a plumbing component, not a glamorous one, but getting this fitting wrong means leaks, pressure loss, or a receiver tank that cannot be used to its rated capacity.

Manufacturer specifications were not available at the time of this listing. The data below is based on the product name, part number, and Cast Air product line knowledge. Contact us at 866-217-0063 for confirmed specs before ordering.

What This Part Does

Function and Application

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• Part Number: 284DM
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• Application: Discharge manifold for the Castair 284-gallon air receiver tank series
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• Function: Distributes compressed air from the receiver outlet to one or more downstream distribution lines or drops
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• Installation Point: Mounts at the tank discharge port, typically at the outlet of the air receiver
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• Manufacturer: Cast Air (Castair), a U.S. industrial air compressor component manufacturer
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Why the Discharge Manifold Matters

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• Pressure integrity: A properly rated manifold holds system pressure without weeping or joint failure — critical on a receiver rated to 200 PSI or higher
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• Multi-drop capability: Manifolds allow a single tank outlet to feed multiple air lines, tools, or workstations simultaneously
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• OEM fit: Using the factory Castair manifold ensures the thread spec, port sizing, and material match what the tank was designed for — no adapters, no improvised fittings
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• System efficiency: The right manifold minimizes restriction at the tank outlet, keeping pressure drop between the receiver and tools as low as possible
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Who Needs This Part

Typical Use Cases

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• Replacement: The original manifold on a Castair 284-gallon system has corroded, cracked, or developed a leak that cannot be repaired — this is the direct replacement
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• Expansion: Adding distribution outlets to an existing 284-gallon receiver that currently has a single-port outlet
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• System rebuild: Reconditioning an older Castair receiver and replacing plumbing components to bring the system back to spec
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• New installation: Completing a 284-gallon tank installation where the manifold was not included with the receiver
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When Does a Shop Need This vs. a Generic Fitting?

You can buy generic pipe fittings from any supply house, and in many cases they will work. The reason to order the Castair 284DM specifically is fit and rating. The manifold is sized and threaded to match the Cast Air receiver outlet exactly. Generic pipe manifolds in the same nominal size may have different thread engagement depth, different body dimensions that affect clearance, or may not be rated to the same working pressure as the Castair tank. For a shop running a 200 PSI receiver, using a manifold rated below that pressure or with questionable thread engagement is a real risk. Order the OEM part when you need certainty.

If your 284-gallon receiver is being replaced entirely, this manifold may transfer to the new tank depending on outlet spec. Call us before ordering if you are unsure — 866-217-0063.

Technical Specifications

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• Part Number: 284DM
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• Manufacturer: Cast Air / Castair
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• Compatible Tank: Castair 284-gallon air receiver series
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• Component Type: Discharge manifold (tank plumbing component)
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• Exact port count, thread size, and pressure rating: Confirm with Cast Air or call 866-217-0063 — manufacturer page data was not available for this listing
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Why Buy From OEM Diagnostic Tools?

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• Specialist since 2016: We stock Cast Air replacement components and know the product line
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• Free shipping on qualifying orders
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• Free tech support at 866-217-0063: Call before ordering if you need to confirm fitment — we would rather you get the right part than return the wrong one
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• Full manufacturer warranty on all Cast Air parts
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• Honest guidance: If a generic fitting will do the job for your application, we will tell you. If you need the OEM part, we will tell you that too.
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Call 866-217-0063 for quick answers and help\!