How To Fix A Pressure Washer Hose — And How Not To

By Jason Geiman, King of Pressure Wash | 194,000+ views on YouTube

A blown or leaking pressure washer hose can shut down your entire day if you don't know how to fix it. Whether it's a small pinhole leak or a full blowout at a fitting, knowing how to repair your hose quickly and correctly is a skill every pressure washing operator needs to have.

I've been running pressure washing rigs for over 15 years, and I've dealt with every type of hose failure you can imagine. In this post, I'll walk you through how to properly fix a pressure washer hose, the common mistakes people make that create more problems, and when you should just replace the hose instead of trying to repair it.

Why Pressure Washer Hoses Fail

Before you can fix a hose properly, it helps to understand why they fail in the first place. High-pressure hoses operate under extreme conditions — 3,000 to 4,000 PSI or more — and they take constant physical abuse on job sites.

Kinking — This is the most common cause of hose failure. Every time a pressure washer hose kinks, the inner liner gets stressed at that point. Over time, repeated kinking weakens the liner until it eventually blows out. Hose reels and proper hose management prevent most kinking issues.

Dragging over rough surfaces — Pulling your hose across concrete, asphalt, brick, and other abrasive surfaces wears down the outer jacket. Once the outer jacket is compromised, the inner reinforcement layers are exposed and start to degrade.

Heat damage — If your pressure washer runs in bypass mode for extended periods, the recirculating water heats up and can damage the hose from the inside. Heat breaks down the rubber compounds over time.

Fitting failures — The connection points where fittings are crimped onto the hose are the most common failure points. Over time, fittings can loosen, corrode, or the hose can pull away from the crimp.

The Right Way to Fix a Pressure Washer Hose

For a blowout in the middle of the hose

If your hose blows out somewhere along its length, you need to cut out the damaged section and splice the hose back together using proper high-pressure repair fittings. You'll need a sharp utility knife or hose cutter, and a set of field-repairable hose fittings rated for your hose's PSI rating.

Cut the hose cleanly on both sides of the damaged area. Make sure your cuts are straight and clean — a jagged cut won't seat properly in the fitting. Push the repair fittings onto each cut end and tighten them according to the manufacturer's instructions. Most field-repairable fittings use a compression design that grips the hose when tightened.

For a leak at a fitting

If the leak is at the fitting connection, first check the o-ring. In many cases, the fitting itself is fine but the o-ring has worn out. Replace the o-ring and see if that solves the problem. If the fitting itself is damaged or the hose has pulled away from the crimp, you'll need to cut off the old fitting and install a new one.

For a pinhole leak

Pinhole leaks are sneaky — they spray a fine mist of high-pressure water that can actually cut skin if you're not careful. The fix is the same as a blowout: cut out the damaged section and splice with proper fittings. Do not try to patch a pinhole leak with tape or sealant — it won't hold under pressure and it's a safety hazard.

How NOT to Fix a Pressure Washer Hose

This is just as important as knowing the right way. Here are the mistakes I see people make all the time:

Don't use duct tape or electrical tape. Tape will not hold under 3,000-4,000 PSI. It might seem like it's working for a few minutes, but it will blow off — potentially at the worst possible moment on a customer's property.

Don't use garden hose repair fittings. Garden hose fittings are rated for 40-80 PSI. Your pressure washer hose is running at 3,000+ PSI. Garden hose fittings will fail immediately or very quickly, and when they do, they become projectiles.

Don't use pipe clamps as a permanent fix. Some people try to clamp a leaking section with a hose clamp. This is a temporary Band-Aid at best and a safety hazard at worst. The clamp concentrates stress on the hose and can cause it to fail right next to the clamp.

Don't splice the hose too many times. Every splice adds a potential failure point and reduces the overall length of your hose. If your hose has more than one or two splices, it's time for a new hose.

When to Replace Instead of Repair

Not every hose is worth fixing. Here's when you should just buy a new one:

The outer jacket is severely worn. If you can see the wire reinforcement through the outer jacket in multiple places, the hose is nearing the end of its life. Repairing one section doesn't address the overall deterioration.

The hose is stiff and inflexible. Over time, heat and chemical exposure make hoses stiff and hard to work with. A stiff hose is more prone to kinking and failure, and it's harder to manage on the job.

You've already spliced it multiple times. Each splice shortens the hose and adds a weak point. At some point, you're better off investing in a new hose than continuing to patch an old one.

The hose is the wrong size for your needs. If you've been running a 3/8" hose and your business has grown to the point where you need a 1/2" hose for less friction loss and better flow, a repair is a good excuse to upgrade.

Keep Repair Supplies on Your Rig

Every pressure washing rig should have a hose repair kit on it at all times. Here's what I carry:

Field-repairable fittings in the sizes that match your hose (3/8" or 1/2"). Keep at least two complete splicing sets. A sharp utility knife or dedicated hose cutter for clean cuts. Replacement o-rings for your quick disconnect fittings. Thread seal tape for any threaded connections. And a pair of adjustable wrenches for tightening fittings.

A hose blowout on a job site is frustrating, but it doesn't have to cost you the entire day. With the right supplies on your truck, you can be back up and running in 15-20 minutes.

Related Articles