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Choosing the Right Nozzles for Your 12V Soft Wash System

Updated Published Tim Cray 4 min read

Key takeaways

  • Match orifice size to the pump. A 5.3 or 5.5 GPM pump wants 30 orifice tips (0030, 1530, 2530, 4030); a 7 GPM pump wants 40 orifice tips (0040, 1540, 2540, 4040).
  • 4030, not 40030. The size with the extra zero is a high-pressure nozzle and will not work on a 12V pump; undersizing leads to numerous pump issues.
  • Use stainless 1/4 meg nozzles on a stainless 4-nozzle holder. Pair them with the ST510 polypropylene gun, which tested best for us.
  • Chase air leaks and gummed-up fittings. Cut and recrimp soft wash hose fittings yearly, check the pressure switch hex screw, and rinse the pump up to 10 minutes after each use.
  • Recommended pump: the Remco Dual Control Smooth Flow, one of the few pumps designed for the soft wash industry rather than an RV or water pump.
In this guide
Choosing the Right Nozzles for Your 12V Soft Wash System - Expert Power Wash

Ever wonder why your 12V soft wash system doesn’t work quite like it should? Keep blowing fuses or dealing with never ending pump issues? Your problem could be as simple as using the wrong nozzles. Yes it could be that simple. Let’s break it down.

The Importance of Choosing the Right Nozzle Tips for Roof Cleaning with Your 12V Soft Wash System

See Video walkthrough at the bottom of this article

The nozzle tips you choose can dramatically impact the function of your soft wash pump system.

The orifice size of your nozzle tip plays a critical role in achieving optimal performance from your soft wash system, especially when cleaning roofs. For a 5.3 or 5.5 GPM pump, it's best to use a 30 orifice size tip. This setup allows for a balanced flow and pressure.

If you’re utilizing a more powerful 7 GPM pump, a 40 orifice size tip is recommended. This larger orifice accommodates the pump’s increased flow rate.

A few more “Tips” no pun intended

  • Use only stainless 1/4 meg nozzles
  • You will need a stainless 4 nozzle holder. This is also referred to as a jrod or J Rod
  • Use the right gun, we have tested many and found the ST510 polypropylene gun to be the best
  • Cut and recrimp your fittings on your soft wash hose yearly. This is a common area to get gummed up and restrict the flow from the pump to nozzle
  • Make sure your pressure switch is set properly. There’s a small hex screw on the top of the pressure switch.
  • Make sure there is no air leaks anywhere in your system. 12V systems function vastly different with a little air leak.
  • RINSE your pump thoroughly after each use not just once at the end of the day. We recommend letting the pump run water for up to 10 minutes.

5.3 and 5.5 Nozzle Sizes

  • 0030
  • 1530
  • 2530
  • 4030

Very important: 4030, no 40030. The size with the extra zero is commonly a high pressure nozzle and will NOT work for a 12V pump.

7 GPM Nozzle Sizes

  • 0040
  • 1540
  • 2540
  • 4040

Under sizing your nozzles can lead to numerous issues to the pump.

Recommended Pump: Remco Dual Control Pump Smooth Flow.

This is not the commonly used RV or water pumps that most use. This pump is one of the few designed for the soft wash industry.

Understanding Spray Patterns for Roof Cleaning

In addition to selecting the right nozzle size, understanding the different spray patterns available is essential for maximizing the effectiveness of your soft wash system during roof cleaning. The right spray angle can help you achieve thorough cleaning while minimizing the risk of damage.

1. 0 Degree Nozzle: This nozzle produces a concentrated stream of water, making it ideal for targeted cleaning of stubborn stains, such as algae or moss. However, caution is advised, as the higher pressure can damage shingles if used too close.

2. 15 Degree Nozzle: Offering a narrow fan pattern, the 15-degree nozzle is effective for more focused cleaning tasks. It’s suitable for cleaning roofs where dirt and debris have built up, providing a balance between pressure and coverage.

3. 25 Degree Nozzle: This nozzle provides a wider spray pattern than the 15-degree option, making it an excellent choice for general roof cleaning. It allows for effective cleaning of larger areas while minimizing the risk of water intrusion under shingles.

4. 40 Degree Nozzle: The 40-degree nozzle offers the widest spray pattern, making it perfect for rinsing and applying cleaning solutions evenly across larger roof surfaces. It’s gentle enough to use on delicate roofing materials, ensuring that surfaces are cleaned without damage.

Conclusion

Choosing the right nozzle tips in conjunction with an appropriate pump is crucial for achieving superior results in roof cleaning with your soft wash system. For 12V systems, pairing a 5.3 GPM pump with 30 orifice size tips or a 7 GPM pump with 40 orifice size tips will ensure optimal performance. The Remco dual control pump is an excellent investment, providing the reliability and versatility needed for effective roof cleaning.

By understanding the different spray patterns—0, 15, 25, and 40 degrees—you can select the right nozzle for your specific roof cleaning tasks. This. With the right equipment and knowledge, you can achieve the best results. Happy washing!

Frequently asked questions

What size nozzles do I need for a 5.5 GPM 12V soft wash pump?
For a 5.3 or 5.5 GPM pump, use a 30 orifice size tip. The set is 0030, 1530, 2530 and 4030. This gives a balanced flow and pressure for roof cleaning.
What size nozzles do I need for a 7 GPM soft wash pump?
A 7 GPM pump needs a 40 orifice size tip to accommodate the increased flow rate. The set is 0040, 1540, 2540 and 4040.
What is the difference between a 4030 and a 40030 nozzle?
The 4030 is the 12V soft wash nozzle. The size with the extra zero, 40030, is commonly a high pressure nozzle and will not work for a 12V pump. Undersizing your nozzles can lead to numerous issues with the pump.
Why does my 12V soft wash system keep blowing fuses or killing pumps?
The problem could be as simple as the wrong nozzles. Undersized nozzles cause numerous pump issues. Also check for air leaks, since 12V systems function vastly differently with even a small leak, make sure the pressure switch is set properly using the small hex screw on top, and cut and recrimp the fittings on your soft wash hose yearly because they gum up and restrict flow.
What gun and nozzle holder should I use on a 12V soft wash system?
Use only stainless 1/4 meg nozzles on a stainless 4-nozzle holder, also called a jrod or J Rod. For the gun, we have tested many and found the ST510 polypropylene gun to be the best.
How long should I rinse my soft wash pump after a job?
Rinse the pump thoroughly after each use, not just once at the end of the day. We recommend letting the pump run water for up to 10 minutes.
Which spray angle should I use for roof cleaning?
The 0 degree gives a concentrated stream for stubborn algae or moss but can damage shingles if used too close. The 15 degree is a narrow fan for focused cleaning where buildup is heavy. The 25 degree is the general roof cleaning choice, covering larger areas while minimizing water intrusion under shingles, and the 40 degree is the widest pattern for rinsing and applying solution evenly across large or delicate roofs.
Written by

Tim Cray

Owner, Expert Power Wash

Tim and Kristina ran their own pressure washing company for more than ten years on trailers, box trucks, flatbeds, vans and skids before Expert Power Wash started building equipment for other contractors. Today EPW has 300-plus builds working in the field and services pressure washing rigs in the Oregon City shop every day.

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