CHAPIN HydroFeed 4702 32 oz In-Line Auto-Mix Fertilizer Injector — Clear Tank, Easy Mounting

The CHAPIN HydroFeed 4702 is a 32-ounce in-line auto-mix fertilizer injector that blends liquid, granular, or fish-emulsion concentrates at the water source for easy, consistent plant feeding.

Designed for home gardens, flower beds, lawns and small landscapes, the HydroFeed 4702 attaches next to a spigot or integrates with irrigation to deliver measured nutrient solution through sprinklers or hoses. Its clear tank and funnel-shaped filling head let you monitor levels and top up without spills, while a rigid inlet tube and in-tank filter keep the mixing solution free of debris. The unit’s compact size and mounting bracket make setup straightforward whether you place it beside a faucet or mount it to a post.

How does the HydroFeed 4702 mix fertilizer with irrigation water?

The HydroFeed uses a patent-pending inline mixing design that pulls concentrate into the water stream at the source so the final solution distributes evenly through your irrigation. An internal inlet tube draws liquid past a filter for debris-free mixing, and the large tank opening simplifies adding products.

• 32-ounce clear tank for visible mixing levels
• Rigid inlet tube with in-tank filter to prevent clogs
• Funnel-top mouth and large O-ring sealed opening for easy, leak-free filling

Can it handle different fertilizer types like liquids, granules, or fish emulsion?

Yes — the HydroFeed 4702 is designed to accept liquid concentrates, soluble granules when pre-dissolved, and fish-emulsion products. For best performance, follow the fertilizer manufacturer’s dilution guidance and strain any coarse particles before filling the tank.

• Works with liquid concentrates and properly dissolved granules
• Safe for fish emulsion when pre-mixed to recommended strength
• In-tank filter reduces the risk of particulate transfer to the irrigation lines

What installation and maintenance steps keep the injector working reliably?

Mount the HydroFeed next to a spigot using the built-in bracket, connect to your hose or irrigation line, and ensure the O-ring is seated to avoid leaks. After each use, open the drain valve to flush remaining product and water; periodic filter checks prevent buildup and maintain steady flow.

• Use the included mounting bracket for secure installation
• Empty and rinse the tank via the drain valve after use
• Inspect and clean the in-tank filter regularly to avoid clogs

Will this work with my drip irrigation or sprinkler setup?

The HydroFeed 4702 is compatible with many hose-fed sprinkler and drip systems when installed at the water source. It meters product into the water stream so downstream emitters, sprayers, or drip tubing receive the mixed solution evenly; confirm hose and fitting compatibility before installation.

• Sits at the faucet or inline at the irrigation source for universal delivery
• Compatible with hose-run sprinklers and many low-pressure drip lines
• Clear tank lets you track remaining concentrate during operation

Who is this for: The CHAPIN HydroFeed 4702 is ideal for gardeners and homeowners who want a simple, compact solution to feed plants through existing hose or irrigation systems without manually mixing and distributing fertilizer each time. It suits small to medium lawns, vegetable plots, raised beds and ornamental borders where controlled mixing and ease of use matter most.