Hydro Systems MiniDos Injector - 3/4in NPT - 12gpm - 2.5% Injection Rate

Compact, Electricity-Free Injection for Smaller Greenhouse and Hobby Operations

The Hydro Systems MiniDos Injector is a water-driven proportional dosing solution sized for smaller greenhouse, hobby, and remote installations where electrical supply is limited or unavailable. Running on fluid pressure alone across 0.04 to 12 GPM at a 0.2% to 2.5% ratio, it delivers repeatable nutrient and chemical dosing without manual mixing.

A direct replacement for the earlier A10 and A12 models, the MiniDos includes a full installation kit and self-primes on start-up, so an existing MiniDos position can be upgraded without reworking the plumbing around it.

Key Features & Benefits

• No electricity required — fully water-driven for remote, outdoor, and electrical-restricted locations.
• 0.2% to 2.5% injection ratio — covers fertilization, sanitation, and chemical treatment programs (1:500 to 1:40).
• Low-flow accuracy to 0.04 GPM — precise injection even at very low flow rates in small system configurations.
• Self-priming — no manual priming needed for fast start-up after installation or a restart.
• Replaces A10 and A12 models — a drop-in upgrade for existing MiniDos installations.

Who Should Use This

Small greenhouse operators, hobby growers, and irrigation professionals who need reliable, low-cost injection without electrical infrastructure for hydroponics, irrigation, chlorination, fertigation, or pH correction programs are the direct fit for the MiniDos.

About Hydro Systems

From a Cincinnati, Ohio headquarters established in 1963, Hydro Systems Co. has focused on proportional dosing pump technology since 1983 and now operates as part of Dover's Pump Solutions Group. The MiniDos is one of that dosing pump lineup's smallest models.

Frequently Asked Questions

Does this injector replace the A10 and A12 models?

Yes — the MiniDos is a direct replacement for both the A10 and A12 Hydro Systems injector models. No plumbing changes are needed at an existing A10 or A12 position.

How wide is the operating pressure range?

The MiniDos operates within 6 to 140 PSI and supports water temperatures from 34 to 100 degrees F. That range covers most greenhouse and hobby water supplies.

What is the average dosing accuracy?

Average dosing accuracy is within 15%, with repeatability within 3% of the selected ratio. That is consistent enough for routine fertilization and treatment programs.

What is included in the kit?

The kit includes the injector, dosage piston, lower shaft assembly, suction tube, mounting bracket, mounting hardware, o-ring, filter, and operating manual. Everything needed for a first installation ships in the box.