Description
When your Solo backpack sprayer starts losing pressure or you notice chemical dripping from the pump housing, it’s usually a worn O-ring causing the trouble. These small seals take a beating from chemical exposure and constant pressure cycling, but when they fail, your sprayer won’t build pressure and you’ll spend more time pumping than spraying. This replacement O-ring gets your pump sealing tight again so you can get back to covering ground efficiently.
What You’re Getting
- Precise-fit seal designed specifically for Solo 425 and 475 pump assemblies
- Chemical-resistant material that stands up to herbicides, pesticides, and fertilizers
- Maintains proper seal under pressure for consistent spray performance
- Direct replacement part that restores your pump’s original sealing capability
Built for Real Spraying Work
This O-ring fits the pump mechanisms in Solo’s popular 425 and 475 backpack sprayers—workhorses that see duty everywhere from fence line spraying to pasture weed control. Whether you’re spot-treating around feed bunkers or covering acres of brush, these sprayers handle the chemicals that keep your operation running smoothly.
Made to Last
Pump seals face harsh conditions—chemical exposure, temperature swings, and constant flexing under pressure. This O-ring is made from materials that resist swelling and cracking from agricultural chemicals while maintaining the flexibility needed for reliable sealing season after season.
Good to Know
When replacing pump O-rings, it’s smart to clean the pump housing thoroughly and check for any rough spots that might damage the new seal. If your sprayer has been sitting with chemicals in it, flush the system well before installing the new O-ring. A little spray lubricant on the seal helps with installation and prevents tearing.
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