Chapin 4700 16 Ounce In - Line Fertilizing Injection System

5 out of 5 stars 2 Reviews | 1 Q&A

Chapin 4700 16 Ounce In - Line Fertilizing Injection System

Buy 2 or more: $47.68 each

Have a Question? Ask Our Pros!

Email Our Pros
We're here to help
Live Chat
Offline. Leave Us a Message

You May Also Need

Average Rating

5 out of 5 stars Rating: 5

2 Reviews | 1 Q&A

Product Overview

The Chapin 4700 16 Ounce In-Line Fertilizing Injection System has a clear tank and a funnel-shaped head for easy monitoring and filling. The adjustable elbow connection allows it to be easily attached to any hose or spigot.  Ideal for liquid fertilizer, the in-line ferilizing injection system features HydroFeed technology and works differently than standard hose end sprayers.  Chemicals tend to have a higher density than water, causing them to sit in the bottom of the tank.  Rather than pulling chemical up and out and emptying the tank like a hose end sprayer, the injection system has an outlet tube that reaches all the way to the bottom of the tank, so that when water is added to the tank, it stays on top of the chemical mix, preventing the chemical from being diluted as it goes through the outlet tube. The tank will turn clear as the chemical runs out. 

Available sizes:

  • 16 oz. (4700)
  • 24 oz. (4701)
  • 32 oz (4702)
  • 1 gal. (4710)
  • 2 gal. (4720)

Features and Specs

For use in Lawns, gardens, and landscapes.
Dimensions 10.00 x 4.40 x 16.20
Tank Size (gal.) .125 gallons
Material / Construction Poly
Pressure (PSI) 40 PSI
Warranty One Year Limited Warranty
Shipping Weight 1.52 lbs
Manufacturer Chapin (Mfg. Number: 4700)
UPC 023883047009



  • Funnel-shaped head for easy filling and monitoring usage;
  • Adjustable connection elbow lets tank mount to any hose spigot;
  • Large opening with O-ring for leak-free operation.


  • Turn off the inlet water pressure.
  • Open the valve on the bottom of the chemical bowl to ensure the device is empty. Close the valve. Loosening of the top red plug will allow the unit to drain quicker.
  • For filling liquid fertilizer: Remove the red plug and slowly pour up to 16 ounces of product into the device. Re-install the red plug, tightening hand tight.
  • For filling graduated concentrate: Unscrew the clear bowl. Scoop desired amount into the the bowl, the re-install the bowl by screwing it on hand tight.
  • The injector is designed to work best with water flow rate above one gallon per minute. At 1 GPM or above, the device is designed to feed the liquid fertilizer at a rate of approximately 1 ounce of fertilizer per gallon of water flower.
  • For dilution rates less than one ounces per gallon, pre-mix the product prior to filling the bowl. Follow recommended dilution rates for the fertilizer being used.
  • Empty the tank and leave the bottom drain valve open when freezing conditions are present.
  • When watering without fertilizer, it is not necessary to disconnect this device.
  • The unit is provided with a filter in the chemical suction tube. periodic cleaning of the filter is recommended.
5 stars   2
4 stars   0
3 stars   0
2 stars   0
1 star   0
Review Search   
Sort Reviews
  • 5 of 5 Stars

    Love my new Chapin

    By Russ on 03/24/2023

    After using a decades old feeder, waiting for it to fall apart. My search began for a new idea. Installing my new Chapin and a few system modifications, I can now fertilize through every hose around my garden without having to stop to switch lines. It works great and has made my job easier

    Was this review helpful to you?  YesNo

    2 of 2 people found this review helpful

  • 5 of 5 Stars

    1 Gallon in-line Fertilizing System

    By Peter on 08/19/2022

    Excellent product . I use it for the automatic fertilizing in my Orchid House. Works perfect.

    Was this review helpful to you?  YesNo

    1 of 1 people found this review helpful

See all 2 customer reviews

Questions & Answers

Have a question about this product?
Sort Questions
Can the Chapin 4700 16 Ounce In - Line Fertilizing Injection System be used for fungicides?

If you have a liquid fungicide that is labeled to be used in an injection system then the Chapin 4700 16 Ounce In-Line Fertilizing Injection System would be ideal to use. If you are uncertain if a liquid fertilizer can be used in the Chapin 4700 16 Ounce In - Line Fertilizing Injection System, we would recommend contacting the manufactuer of the fertilizer for confirmation or Chapin directly at 800-950-4458. 

Was this answer helpful to you?  YesNo

0 of 1 people found this answer helpful

From $49.44 + Free Shipping*