T E C H L I N E A S ™ D E S I G N G U I D E
NETAFIM @BCL@C40BDC65.doc 21/12/2009 22
TECHFILTER (SPU):
Techfilter is installed into SDI systems to help protect the dripper from possible root intrusion.
The Techfilter cartridge is impregnated with Trifluralin
(Treflan) which is released into the drip
system in minute quantities and locks up in the soil outside of the drip opening. It creates a
barrier around the drip opening which will inhibit root intrusion.
A Techfilter should be installed in all SDI systems.
Install the Techfilter downstream of the Filter and upstream of the PRV.
The Techfilter cartridge should be changed at least every two years to ensure that
Trifluralin levels are maintained in the system.
Place a label with the replacement date of the cartridge on the Techfilter housing to
remind you of the date that the cartridge should be replaced.
Refer to Techfilter installation & handling instructions.
Install the Techfilter in a valve box enclosure that allows easy access to enable
cartridge replacement.
An ARI RP500 Back-flow device must be installed on all systems which are connected
to potable
(mains/scheme) water supplies. Check with your local water authority
regarding appropriate back-flow selection and installation.
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