Solo Piston Pump Repair Kit – Fits Solo 425, 435 & 473 Backpack Sprayers

Restore Lost Pressure and Fix Leaks in Your Solo Sprayer

This Solo piston pump repair kit is the genuine, cost-effective way to bring a tired Solo backpack sprayer back to life. If your sprayer has started losing pressure or leaking, the pump seals and components are usually the culprit, and this kit replaces the essential parts so you can restore performance without buying a whole new sprayer. It is designed to fit the Solo 425, 435 and 473 models.

Fixes the Most Common Sprayer Problems

Lost pressure, weak spray and leaks are the classic signs of a worn piston pump. Over time the seals harden and wear, and pressure escapes instead of building in the tank. Fitting fresh seals and components from this kit re-seals the pump, so it holds pressure and sprays strongly again, just as it did when new.

Genuine Fit for 425, 435 and 473

As a genuine Solo repair kit, it is matched to the piston pumps used in the Solo 425, 435 and 473 sprayers, so the parts fit correctly rather than being a rough aftermarket approximation. That correct fit is what makes the repair reliable and long-lasting.

A Smarter Alternative to Replacing the Sprayer

A repair kit costs a fraction of a new sprayer, so restoring the pump you already have is the practical choice for gardeners, landscapers and professionals who depend on their gear. With the essential seals and components in one kit, you have what you need to get the sprayer back in action.

Key Features & Benefits

• Genuine Solo piston pump repair kit
• Fits Solo 425, 435 and 473 backpack sprayers
• Includes essential seals and pump components
• Restores lost pressure and fixes leaks
• Durable parts for a long-lasting repair
• Cost-effective alternative to replacing the whole sprayer
• Ideal for gardeners, landscapers and professionals

How to Use

Depressurise and empty the sprayer first, then access the piston pump following your sprayer's instructions. Remove the worn seals and components and replace them with the matching parts from the kit, taking note of how each part sits as you go. Reassemble the pump, then test by part-filling the tank, pumping up pressure and checking that it holds and sprays cleanly with no leaks. Refer to your Solo sprayer manual for the correct pump layout for your model.

Frequently Asked Questions

Which sprayers does this repair kit fit?
It is designed to fit the piston pumps in the Solo 425, 435 and 473 backpack sprayers.

What problems does it fix?
It is used to fix a sprayer that has lost pressure, sprays weakly or is leaking, by replacing the worn pump seals and components.

What is included in the kit?
It includes the essential seals and components needed to service and re-seal the piston pump.

Is it hard to fit?
Most people with basic DIY confidence can fit it by following the sprayer's manual. Depressurise and empty the sprayer first, and note how each part sits as you replace it.

Why repair instead of replacing the sprayer?
A repair kit costs far less than a new sprayer, so servicing the pump you already have is a smart, economical way to get more life out of your Solo sprayer.

Where can I buy a Solo piston pump repair kit in Australia?
It is available online from BPG Supplies, with shipping across Australia and local pickup in Bonnyrigg, NSW.