Solo 4400221-P Diaphragm Sprayer Pump Assembly with Pressure Valve

Revive your Solo sprayer with the authentic Solo 4400221-P Complete Diaphragm Sprayer Pump Assembly. This comprehensive replacement kit is engineered for seamless compatibility with Solo models 475, 473ecs, 477SW, 478, 478-EN, 475 DLX, 473-D, and 485. It includes a pressure regulating valve with four adjustable settings: 15, 30, 45, and 60 PSI, allowing you to tailor the spray pressure for varied applications, from gentle misting to robust spraying, ideal for both delicate plant care and more demanding agricultural tasks.

Every component required for a complete replacement is included, featuring seals, O-rings, clamps, and all necessary hardware, eliminating the need to source individual parts. The high-quality diaphragm design ensures consistent pressure delivery for precise application of pesticides, herbicides, and fertilisers. Proudly made in the USA, this genuine replacement part meets the highest standards for durability and longevity, ensuring reliable performance. The straightforward installation process facilitates a quick return to your spraying tasks with minimal downtime. Trust the Solo 4400221-P pump assembly to restore peak performance to your sprayer.