---
product_id: 635837274
title: "3.5% Dosing Pump"
brand: "jonflyer"
price: "€ 35.69"
currency: EUR
in_stock: false
reviews_count: 7
url: https://www.desertcart.fr/products/635837274-3-5-dosing-pump
store_origin: FR
region: France
---

# 13.21 GPM max flow 0.2-3.5% precise dosing range Durable POM corrosion-resistant housing 3.5% Dosing Pump

**Brand:** jonflyer
**Price:** € 35.69
**Availability:** ❌ Out of Stock

## Summary

> 💦 Effortless dosing, unstoppable growth.

## Quick Answers

- **What is this?** 3.5% Dosing Pump by jonflyer
- **How much does it cost?** € 35.69 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.fr](https://www.desertcart.fr/products/635837274-3-5-dosing-pump)

## Best For

- jonflyer enthusiasts

## Why This Product

- Trusted jonflyer brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Last:** Robust POM housing resists impact, weather, and corrosion for long-term reliability.
- • **Flow Like a Pro:** Handles up to 13.21 gallons per minute, ideal for any scale from home gardens to commercial greenhouses.
- • **Precision Meets Power:** Accurate chemical dosing from 0.2% to 3.5% ensures perfect nutrient delivery every time.
- • **Plug & Play Efficiency:** Water-powered design means zero electricity needed—easy installation with no irrigation system overhaul.
- • **Versatile & Time-Saving:** Perfect for drip irrigation, livestock watering, water treatment, and more—boost productivity effortlessly.

## Overview

The GEN Ⅱ Fertilizer Injector is a water-powered, automatic chemical dosing pump with a precise 0.2-3.5% proportional range and a maximum flow rate of 13.21 GPM. Constructed with durable, corrosion-resistant POM housing, it offers reliable, electricity-free operation for drip irrigation, greenhouse, livestock, and water treatment applications. Easy to install and maintain, it delivers consistent, accurate liquid mixing to optimize plant and crop health.

## Description

Automatic Fertilizer Injector Durable POM housing Exquite internal designed Accurate proportioning Automatic Fertilizer Injector Accurate proportioning of chemical liquids Labor-saving and time saver Fertilize grass,flower,fruits,vegetables Accurate proportioning of chemical liquids Labor-saving and time saver Fertilize grass,flower,fruits,vegetables JONFLYER is committed to producing high quality products to domestic and commercial cleaning,as well as facilitating garden work. JONFLYER believes creative products will greatly saving time and labor.Make things easier and just "fly" away from clutter. JONFLYER is committed to producing high quality products to domestic and commercial cleaning,as well as facilitating garden work. JONFLYER believes creative products will greatly saving time and labor.Make things easier and just "fly" away from clutter. Liquid Dosing Pump, Easy Work

Review: Junk. Not accurate. Unreliable - Not consistent at all. I've used an EC meter to test the output and it's all over the map. I can't get the injector to get even close to the desired level. I can't believe I bought 3 of these pieces of junk. These will be going in the trash!
Review: Seller related defective unit. - Revised review. Contacted seller and troubleshot. Unit did not work, they sent a replacement and it works out of the box. Not sure what is wrong with the first one. Revising rating. Does not work out of the box. This seems to be a pretty close copy of another brand D25R model. This seems like it should work, I disassembled and reassembled 10-15 times and still no function. It should intake chemical but does not and it should “click” as it’s doing so. Unit does not click when water is run through, only when disassembled and doing it by hand. Return window closed before I even installed it.

## Features

- Product Parameters: Proportional Range:0.2-3.5%(1:500-1:28.6);Flow Range:0.044-13.21 GPM;Working Water Pressure:2.9-87 PSI;Working Water Temperature:1-50 ℃;PH Range:3-11;Connection Size:3/4" NPT; Please note the fertilizer injector can only be used to mix liquids,not gases;Any problem about installation or use,please let us know first,our tech support will solve the problem for you
- Water Powered Fertilizer Injector: POM housing,more strong,impact resistance,weather resistant and corrosion resistant;Upgraded inner structure and higher quality materrial seals,more stable for working;Attached specially designed one-way valve(can be installed on the pump inlet) to effectively prevent liquid backflow;Perfect for home growers and pros alike
- Accurate and Labor-saving: Precise volume-based dispensing;Unaffected by water flow and pressure;Water powered,no electricity or other power needed;Easy to install and set up; No need to change irrigation system or control scheme;easily achieve efficient drip irrigation
- Liquid Dosing Pump: This dosing pump can be widely used in industries that need to dilute chemical liquid solution,such as agricultural drip irrigation,livestock breeding,industry,nutrient delivery system,car washing,and water treatment(like oxidizer injector for water well),etc; Greatly time saver; Ideal choice to water or fertilize plants(like grass,lawn,flower,fruits,vegetables) and crops in garden,greenhouse or agriculture
- Easy to Use: Attach to water hose,set the dilution rate,turn on the faucet,the fertilizer injector will automatically and evenly mix the water and concentrate; Value for money,greatly saving your money for purchasing a more expensive one;If the item you received is a little wet,or has some sound during working,please be assured it's normal

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0D4H3Y371 |
| Best Sellers Rank | #589,979 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #1,505 in Automatic Drip Irrigation Kits |
| Brand | JONFLYER |
| Brand Name | JONFLYER |
| Color | Blue |
| Customer Reviews | 2.7 out of 5 stars 10 Reviews |
| Flow Rate | 13.21 Gallons Per Minute |
| Included Components | Dosing pump,Tube |
| Item Type Name | Fertilizer Injector 3.5% |
| Item Weight | 1.61 Kilograms |
| Manufacturer | JONFLYER |
| Manufacturer Part Number | PB 235 |
| Material | Polyoxymethylene (POM) |
| Material Type | Polyoxymethylene (POM) |
| Model Number | PB 235 |
| Power Source | Water Powered |
| Product Style | Minimalist |
| Style | Minimalist |

## Product Details

- **Brand:** JONFLYER
- **Color:** Blue
- **Material:** Polyoxymethylene (POM)
- **Style:** Minimalist
- **Power Source:** Water Powered
- **Item Weight:** 1.61 Kilograms
- **Maximum Flow Rate:** 13.21 Gallons Per Minute
- **Manufacturer:** JONFLYER

## Images

![3.5% Dosing Pump - Image 1](https://m.media-amazon.com/images/I/61XLgQySj3L.jpg)
![3.5% Dosing Pump - Image 2](https://m.media-amazon.com/images/I/716+AcsgSHL.jpg)
![3.5% Dosing Pump - Image 3](https://m.media-amazon.com/images/I/91o4ZUisgRL.jpg)
![3.5% Dosing Pump - Image 4](https://m.media-amazon.com/images/I/81rZ4JXL-hL.jpg)
![3.5% Dosing Pump - Image 5](https://m.media-amazon.com/images/I/71zwvoZghnL.jpg)

## Customer Reviews

### ⭐ Junk. Not accurate. Unreliable
*by W***. on July 26, 2025*

Not consistent at all. I've used an EC meter to test the output and it's all over the map. I can't get the injector to get even close to the desired level. I can't believe I bought 3 of these pieces of junk. These will be going in the trash!

### ⭐⭐⭐⭐ Seller related defective unit.
*by J***S on November 3, 2025*

Revised review. Contacted seller and troubleshot. Unit did not work, they sent a replacement and it works out of the box. Not sure what is wrong with the first one. Revising rating. Does not work out of the box. This seems to be a pretty close copy of another brand D25R model. This seems like it should work, I disassembled and reassembled 10-15 times and still no function. It should intake chemical but does not and it should “click” as it’s doing so. Unit does not click when water is run through, only when disassembled and doing it by hand. Return window closed before I even installed it.

### ⭐⭐⭐⭐⭐ Good quality
*by A***O on August 25, 2024*

This may be made of plastic but it is heavy duty plastic. It’s really well made. It’s basically a more affordable version of a Dos*tron. It’s easy to plumb into my irrigation system. It does take some getting used to get the correct dosage, so I suggest doing test runs before feeding. I Love that they included replacement seals! The top is difficult to remove, which is both good and bad. It seals well and doesn’t leak. I have very high water pressure so I use a pressure regulator to protect the pump. Once this is setup and dialed in it makes feedings easy! Changes the game.

## Frequently Bought Together

- JONFLYER GEN Ⅱ 0.2-3.5% Fertilizer Injector Automatic Chemical Liquid Dosing Pump,13.21 GPM,POM Housing,Water Powered Liquid Dispenser for Drip Irrigation Garden Greenhouse Livestock Water Well
- Raindrip R255DT 1/4-Inch Drip Irrigation Supply Tubing, 50 Foot, , for Drip Irrigation, Drip Emitters, Irrigation Parts, Systems, White Polyethylene
- Water Timer for Garden Hose Faucet, Hose Timer for Watering, Outdoor Sprinkler Timer with AUTO/Manual/Rain Delay/Child Lock,1 Outlet

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.fr/products/635837274-3-5-dosing-pump](https://www.desertcart.fr/products/635837274-3-5-dosing-pump)

---

*Product available on Desertcart France*
*Store origin: FR*
*Last updated: 2026-06-04*