Injection Fittings

Injection fitting prevents backflow from a treated Line*

1/4" and 1/2" Male NPT for pipe installation.
Available tubing connection sizes:
- 1/4" tube
- 3/8" tube

The Injection Fittings are provided as standard on all Chem-Feed (diaphragm) and FlexFlo (peristaltic) injector pumps.

Injection Fitting
1/4" tube 3/8" tube

Injection Fitting (check Valve) installation.

The Injection Fitting is designed to install directly into either 1/4" or 1/2" female pipe threads (NPT).

You can trim the injection point (nose) if needed. See image to the right.

The nose section is designed to inject the chemical away from the wall of your pipe.

We do offer another Injector Fitting for smaller pipe sizes (such as 1/2" and 1/4"). This fitting does not have the same length at the injection point (nose). See images to the right.

Install the Injection Fitting directly into a tee fitting.

The solution must inject directly into the flow stream.

Use Teflon® thread sealing tape on the pipe threads of the Injection Fitting.

This illustration shows the Injection Fitting installed in a tee fitting using the 1/2" threads.

You can install the Injection Fitting directly into your pipe.

Drill the correct size hole and then tap the hole for 1/4" or 1/2" NPT.

Use Teflon® thread sealing tape on the pipe threads of the Injection Fitting.

This illustration shows the Injection Fitting installed directly into pipe using the 1/4" threads.

Exploded View (ball check valve)

Cut an appropriate length of discharge tubing (opaque tube). Push one side of the tubing onto the compression barb of the Injection Fitting. Use the tube nut to secure the tube. Hand tighten only.

The exploded view drawing above shows the "tube nut" on the far right hand side. The part to the left side of the "tube nut" is the "compression fitting" that the tube must fit onto.

Cleaning:
The Injection Fitting (check valve) will require periodic cleaning, especially when injecting fluids that calcify such as sodium hypochlorite. See our "How To" page on cleaning your Injection Fittings.

Tip: Standard Injection Fittings are made of Polypropylene. PVDF Injection Fittings are recommended for use with aggressive chemicals which are not compatible with Polypropylene.
PVDF Injection Fittings should be considered for use with chlorine at elevated temperatures.

Available Injection fittings with 1" nose.

Model No.	Tube connection (OD)	Body material	Cracking Pressure	O-ring
A-014HD-4A	1/4" tubing	Polypropylene	1/2 lb.	Viton / Aflas
C-395HD-4A	1/4" tubing	Polypropylene	6 lb.	Viton / Aflas
A-014HD-6A	3/8" tubing	Polypropylene	1/2 lb.	Viton / Aflas
C-395HD-6A	3/8" tubing	Polypropylene	6 lb.	Viton / Aflas
A-014HDK-4A	1/4" tubing	PVDF	1/2 lb.	Viton / Aflas
C-395HDK-4A	1/4" tubing	PVDF	6 lb.	Viton / Aflas
A-014HDK-6A	3/8" tubing	PVDF	1/2 lb.	Viton / Aflas
C-395HDK-6A	3/8" tubing	PVDF	6 lb.	Viton / Aflas

See an example of a Typical Installation drawing.

* This is not an anti-siphon valve

Note: The injection fitting is not intended to prevent siphoning. This is not an anti-siphon valve.

Caution: Always wear protective clothing, face shield, safety glasses and gloves when working on or near your metering pump.
Additional precautions should be taken depending on the solution being pumped. Refer to MSDS precautions from your solution supplier.

Note: All diagrams are strictly for guideline purposes only. Always consult an expert before installing the metering pump on specialized systems. The metering pump should be serviced by qualified persons only.