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Description

The Hotsy BD Series pressure washer is built for demanding commercial cleaning where you need high pressure, solid water flow, and a machine that can handle regular use. The series covers a wide range of cleaning needs, from 3.4 GPM at 3,000 PSI up to 4.5 GPM at 5,000 PSI. 

These machines use belt-driven Hotsy triplex pumps and commercial gas engines, with engine options from Honda, Vanguard, and HOTSY depending on the model. Hotsy’s featured BD-404029 delivers 4.0 GPM at 4,000 PSI with a 479cc Vanguard 16 engine. Hotsy also lists a 50-foot wire-braided high-pressure hose, downstream detergent injection, variable-pressure dual-lance wand, visual hour meter, and ETL certification for that model.

The gas-powered cold water pressure washer lineup gives contractors, fleet crews, municipalities, and industrial users several output levels to choose from, so you can match the machine to the cleaning work instead of settling for a one-size-fits-all setup.

BD Series Models

Model GPM PSI Engine Displacement
BD-373539 3.7 3,500 Honda GX390 389 cc
BD-404029 4.0 4,000 Vanguard 16 479 cc
BD-405039E 4.0 5,000 Honda GX630 688 cc
BD-405039EK 4.0 5,000 LC2V80F-D 764 cc
BD-455039E 4.5 5,000 Honda GX690 688 cc

*Hotsy identifies models with an “E” suffix as electric-start engines.

Downloads

Spec Sheet

HOTSY BD Series Portable Gas Cold Water Pressure Washer, Belt Drive, 3.7–4.5 GPM | 3500–5000 PSI ↓ DOWNLOAD

Owner's Manual

Owner's Manual ↓ DOWNLOAD
  • 3.7 @ 3500
  • 4.0 @ 4000
  • 4.0 @ 5000
  • 4.5 @ 5000
  • 3.4 @ 3000
  • Honda GX390
  • Vanguard 16
  • Honda GX630
  • LC2V80F-D
  • Honda GX690
  • Kohler KD440
  • Pull Start
  • Electric Start
Specifications
Model Number
BD-373539
Part Number
1.107-021.0
Engine Model
Honda GX390
PSI
3500
GPM
3.7
Drive
Belt Drive
CC
389
Start Type
Pull Start
Pump Model
HM4035R.3
Dimensions (L × W × H)
42" x 26" x 30"
Weight
275

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The Hotsy BD Series pressure washer is built for demanding commercial cleaning where you need high pressure, solid water flow, and a machine that can handle regular use. The series covers a wide range of cleaning needs, from 3.4 GPM at 3,000 PSI up to 4.5 GPM at 5,000 PSI. 

These machines use belt-driven Hotsy triplex pumps and commercial gas engines, with engine options from Honda, Vanguard, and HOTSY depending on the model. Hotsy’s featured BD-404029 delivers 4.0 GPM at 4,000 PSI with a 479cc Vanguard 16 engine. Hotsy also lists a 50-foot wire-braided high-pressure hose, downstream detergent injection, variable-pressure dual-lance wand, visual hour meter, and ETL certification for that model.

The gas-powered cold water pressure washer lineup gives contractors, fleet crews, municipalities, and industrial users several output levels to choose from, so you can match the machine to the cleaning work instead of settling for a one-size-fits-all setup.

BD Series Models

Model GPM PSI Engine Displacement
BD-373539 3.7 3,500 Honda GX390 389 cc
BD-404029 4.0 4,000 Vanguard 16 479 cc
BD-405039E 4.0 5,000 Honda GX630 688 cc
BD-405039EK 4.0 5,000 LC2V80F-D 764 cc
BD-455039E 4.5 5,000 Honda GX690 688 cc

*Hotsy identifies models with an “E” suffix as electric-start engines.

Spec Sheet

HOTSY BD Series Portable Gas Cold Water Pressure Washer, Belt Drive, 3.7–4.5 GPM | 3500–5000 PSI ↓ DOWNLOAD

Owner's Manual

Owner's Manual ↓ DOWNLOAD
HOTSY BD Series Portable Gas Cold Water Pressure Washer, Belt Drive, 3.7–4.5 GPM | 3500–5000 PSI

Manuals & Downloads

Spec Sheet Owner's Manual

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Cold Water Pressure Washer FAQs

What Commercial Cold Water Pressure Washer and Accessories Should I Choose?

Seattle Pump specializes in industrial pressure washers designed for reliability and ease of service. We help you evaluate factors like PSI, GPM, power source, mobility needs, and application type to match you with the right electric or gas-powered unit, as well as the right tools/accessories for the work you’ll do.

Do You Offer Pressure Washer Rentals?

Yes. Seattle Pump offers short and long-term rentals of cold water pressure washers, including portable units, allowing you to access professional-grade equipment without committing to a full purchase.

Should I Choose an Electric or Gas Pressure Washers?

Electric pressure washers are ideal for indoor, noise-sensitive, or emission-restricted environments, but horsepower and GPM/PSI capability is limited by the building’s available power-supply at outlets and electrical panel. Gas-powered pressure washers offer greater mobility and higher output for outdoor and heavy-duty cleaning applications.

Do Pressure Washers Support Chemical Injection?

All of our commercial cold water pressure washers are compatible with downstream chemical injection systems, making them well-suited for property maintenance, surface cleaning, and routine wash-down tasks.

Do You Service and Repair Cold Water Pressure Washers? ChatGPT can make mistakes. Workspace data isn't used to train models.

Seattle Pump provides full in-shop and limited mobile service for commercial cold water pressure washers across all major brands. Our local parts inventory and experienced technicians help minimize downtime and keep equipment running reliably.

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