Comet P40 - 300 PSI 11.0 GPM Pull StartGas Soft Wash Unit

This professional soft wash system delivers low pressure with high water volume, using specialized detergents to safely and effectively clean delicate surfaces. Ideal for roofs, siding, wood structures, and other sensitive materials, soft washing provides powerful results without the damage caused by high pressure.

Powered by a commercial-grade Honda engine, this unit offers an excellent weight-to-power ratio and is engineered for all-day, everyday use in demanding commercial environments.

A gear-drive system reduces the engine’s 3,500 RPM down to 550 RPM at the pump, increasing efficiency and extending pump life. The high-volume Comet diaphragm pump features chemical-resistant wet parts, making it fully compatible with aggressive soft wash chemicals.

Designed with durability and serviceability in mind, this unit includes a single-piece manifold to reduce leak points and speed up maintenance, along with multiple reinforced components for long-term reliability.

Key Features

• 300 PSI / 11.0 GPM soft wash system
• Commercial Honda pull-start gas engine
• Gear drive system (3,500 RPM engine to 550 RPM pump)
• Commercial-grade Comet diaphragm pump
• Chemical-resistant wet parts for soft wash detergents
• Single-piece manifold for fewer leaks and easier service
• Molded insets that cannot come loose
• Bolt-on pressure regulator to prevent leaks during adjustment
• Aluminum head plates to prevent flexing
• Metal oil cup for added impact resistance
• Actual product may vary slightly from images shown.

Package Information

• Weight: 90 lbs
• Dimensions (L × W × H): 32″ × 23″ × 22″

About Expert Power Wash

Expert Power Wash is built and operated by Tim and Kristina — a team passionate about giving
pressure washing professionals the best equipment available. Every skid is hand-built in Oregon City, OR, with a focus on quality, reliability, and ease of use in the field.

Our goal is to source 95% of the parts we use from the USA. We distribute across 24 states, Canada, and overseas — backing every unit with a lifetime warranty and personal customer support. We don't just sell equipment; we help you build a successful business with hands-on training and ongoing guidance

Shipping & Pickup

We recommend in-person pickup in Oregon City, OR — this includes a free 2-hour
hands-on training session so you leave confident operating your skid. Transport
shipping is also available and coordinated directly with you.