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Fixed Rate Injector - Chemilizer Products

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The HN55 is a proportional liquid chemical injector; it injects a precise amount of chemical in proportion to a volume of water.

The HN55 does not use electricity. It runs off of water flows as low as one gallon per hour, and will work with gravity via a water drop of as little as 5 feet (1.5 meters)!

Item No Description Freight List Price Price Save  
HN55 Hn55 Fixed Rate Injector FREE $478.43 $318.95 $159.48




Technical Specifications
  U.S. Measure Metric Measure
System Water Flow 1 GPH – 780 GPH
0.01666 GPM – 13 GPM
3.78 LPH – 2,724 LPH
0.063 LPM – 45.4 LPM
Pressure Range 2 to 80 psi 0.138 to 5.51 bar
Max. Temp 110° F 43.3 C
Pipe Size* 3/4 nht (National Hose Thread) N/A
Ratio **see label on chemical pump **see label on chemical pump
Size 11” high x 8.5” wide 27.9 cm high x 21.6 cm wide
Weight 6.75 lbs 2.5 kg
* Pipe Size refers to the diameter of the connections for the inlet and outlet to the injector.
The injector will work with larger pipe-sized systems, by installing reducer fittings.

Accurate and dependable injection
The HN55 utilizes a unique diaphragm driven water motor and a hardened, positive displacement chemical pump ensuring a high level of accuracy!

Durable and rugged performance
The HN55 is field-proven to be highly reliable and rugged. The HN55’s diaphragm water motor is unaffected by small particles in the water flow, such as sand, which scar pistons damaging competitive injectors. Also, the HN55 injects chemicals into the water flow downstream of the injector. Chemicals never enter the water motor, precluding it from chemical damage.

Simple to install
Chemilizer injectors are simply installed using standard plumbing parts that are easily obtained from most hardware or plumbing stores. Chemilizer also sells installation kits, ensuring you have everything you need to get the job done.

Quick and easy maintenance
Typical maintenance does not require tools! General maintenance involves the chemical pump which is easily removed with a quick ¼ turn. Otherwise, Chemilizer has a nationwide network of Factory Authorized Repair Centers to assist you.

Chemilizer Products, Inc. provides the most comprehensive warranty in the industry! We provide a 2-year warranty on the water motor – a warranty that provides for more than just defects in materials and manufacturing!


Home Swimming Pool Supplies Chlorinator Fixed Rate Injector


small $3.99 to $7.99 handling fee per order

Order Amount Handling Fee
$0.01 - $24.99 $8.99
$25.01 - $100.00 $9.99
Over $100.00 $10.99
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Fixed Rate Injector - Chemilizer Products