Iwata Eclipse HP-BCS Siphon Feed Dual Action Airbrush - High Flow, Easy Cleaning, 2 oz Bottle Review (2026)

What it is

The Iwata Eclipse HP-BCS is a siphon feed, dual action airbrush from Iwata's Eclipse series, built with an E5 head system and a compression fit nozzle that Iwata designed for easy cleaning and reassembly. It ships with a 2 oz (60 ml) siphon bottle, a head cap spanner for nozzle maintenance, and a bottle of Iwata Lube to keep the needle and trigger mechanism moving smoothly. Dual action means a single trigger controls airflow when pressed down and paint flow when pulled back, the standard control scheme most airbrush painters learn on regardless of brand or model.

Why siphon feed and a larger bottle

Unlike gravity feed airbrushes that rely on a small cup sitting above the nozzle, the HP-BCS draws paint up from a bottle mounted below using air pressure, which is why Iwata lists a working pressure range of roughly 35 to 55 psi, higher than many gravity feed models need. The tradeoff for that higher pressure requirement is volume: the 2 oz bottle holds far more paint than a typical gravity cup, and additional bottles can be prefilled with different colors and swapped in for quicker color changes across a larger project without refilling a cup each time. That balance of pressure and volume makes the siphon setup a deliberate design choice rather than a compromise, aimed squarely at painters who need to keep spraying steadily across a bigger job.

Where the high flow design shines

Iwata markets this model around a high flow, versatile Performance nozzle system built to atomize thicker paints and liquids with less need for reducing or thinning them first, which matters for primers, sealers and other materials that can be too heavy for a fine detail airbrush to spray cleanly. That combination of high flow output and a larger paint supply makes the HP-BCS well suited to covering broader surfaces efficiently, such as priming a car body, base coating a large diorama piece, or working through several kits in one painting session without constant refills.

Tradeoffs to weigh

The siphon bottle setup that gives this airbrush its paint capacity also adds physical bulk underneath the gun compared with a gravity feed cup sitting flush on top, which can make it feel less balanced or more cumbersome when working close in on small, detailed parts. The higher working pressure range also means it draws more from a compressor than a low pressure gravity feed detail airbrush would. Painters focused mainly on fine line work and small scale detail may find a gravity feed Eclipse model with a finer nozzle a better fit for that specific task.

Bottom line

For modelers and painters who regularly cover larger surfaces with primer, base coats or heavier bodied paint, and who want Iwata's build quality and the flexibility to prefill extra bottles for fast color changes, the Eclipse HP-BCS is a strong choice. It is not the airbrush to reach for when the job calls for the finest possible detail lines, where a gravity feed model with a smaller nozzle and lower pressure requirement will generally perform better and feel lighter in hand. Many painters end up owning one of each, keeping this model dedicated to primer and base coat duty while a finer nozzle airbrush handles detail passes.

Frequently asked questions