The Contractor’s Guide to Long-Lasting Pressure Washer Performance

A reliable pressure washer is one of the most valuable tools in any exterior cleaning setup. But even the most powerful unit won’t last long without routine care. Whether you use your pressure washer daily for jobs or a few times a month, basic maintenance can make or break your equipment’s lifespan.

At LNI Equipment, we help contractors and pros keep their machines running at peak performance. This guide walks through practical, real-world tips to protect your investment and avoid costly downtime.

1. Understand Your Equipment First

Before grabbing the wrench, get familiar with your specific model.

Read the owner’s manual for startup, shutdown, and maintenance procedures
Identify pump type (triplex, axial, wobble), engine specs, and fuel type
Learn which parts require routine inspection (filters, O-rings, seals)

Need help? If you purchased your unit from LNI, our team is always here to walk you through it.

2. Start with Daily Visual Inspections

Before each use, do a quick check:

Are hoses intact and fittings leak-free?
Does the oil level look good?
Any buildup around the pump or engine?
Is your unloader valve functioning properly?

A 2-minute walkaround prevents half-day breakdowns.

3. Use the Right Nozzles for the Right Job

Using the wrong tip can:

Damage sensitive surfaces
Strain your pump
Waste water and chemicals

Keep a labeled nozzle set on hand and know your basics:

0° – For heavy buildup (use with caution)
15° – Tough concrete cleaning
25° – General-purpose washing
40° – Rinsing large surfaces
Soap tip – Low pressure chemical application

Ask LNI about our quick-connect nozzle kits and holders.

4. Keep the Pump Healthy with Routine Oil Checks

Triplex pumps, especially on belt-drive systems, require regular oil changes.
When to change pump oil:

After the first 50 hours
Then every 200–250 hours (or as recommended)

If the oil looks milky or dark, it’s time. LNI carries high-performance pump oils in-store.

5. Flush After Every Use—Especially with Chemicals

If you're downstreaming bleach or other detergents, flushing your system afterward is critical.

Run clean water through the pump, hose, and gun
Disconnect your chemical injector or bypass valve
Let the engine run with fresh water for a few minutes

This prevents corrosion, extends pump life, and avoids chemical buildup in lines.

6. Store It Right—Protect from Freezing

Leaving water in your system during cold months is a recipe for cracked pumps.
Before storing:

Disconnect all hoses and drain the system
Use pump saver antifreeze to coat internal seals
Store indoors or in a weatherproof location

Need supplies? LNI stocks pump saver and winterizing kits specifically for pressure washers.

7. Clean or Replace Filters & Strainers Regularly

Inline water filters keep debris out of your pump
Chemical strainers ensure consistent mix ratios
Fuel filters protect your engine’s carburetor

Clean these monthly or as needed depending on job frequency.

Final Thoughts: Small Maintenance = Big Savings

A pressure washer isn’t a “set it and forget it” tool. It’s an engine-driven, water-powered workhorse that deserves routine care.

At LNI Equipment, we build and service machines for long-term success—and we stock the replacement parts and upgrades pros trust.

Looking to keep your machine running like new?
Visit our showroom in Sayreville, NJ
Shop pressure washer accessories, parts, and cleaners
Ask us about maintenance services and diagnostics
Call/Text: 732-522-8880
lniequipment.com

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