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0901221 Rev: A (05/20)
FLEX
-
GAP ANNUAL CLEANING AND TEST PROCEDURES FOR UNITS INSTALLED IN CANADA
Each year, your chemical dispenser must be cleaned and its backflow prevention performance verified. As this
device is an end
-
of
-
line device (versus an in
-
line device) and evidence of effective backflow prevention is
determined visually, a two
-
minute pressure test is not necessary.
If the Flex
-
Gap device cannot readily be seen during the test procedure, the housing of the chemical dispensing unit
must be removed during testing. Apply the appropriate test procedure below as applicable for your chemical
dispensing unit.
4 GPM VENTURIS
1.
Fill discharge hose with water by opening the valve.
2.
When water begins to exit the discharge hose turn off the water and raise the end of the hose above the
Flex
-
Gap.
3.
Observe that water is exiting the Flex
-
Gap.
4.
If the water is exiting the Flex
-
Gap it has passed the test.
5.
If the water is not exiting from the Flex
-
Gap, replace the Flex
-
Gap sleeve as per the instruction manual and
re
-
test.
6.
If the water is not exiting from the Flex
-
Gap after replacing the sleeve and re
-
testing, replace the complete
Flex
-
Gap assembly and re
-
test.
7.
If the water is not exiting from the Flex
-
Gap after replacing the Flex
-
Gap assembly, disconnect the water
supply and replace the complete unit.
1 GPM VENTURIS
1.
Remove the Fill Tube Spout and replace with a 4
-
foot length of
1/2”
ID hose.
2.
Fill the discharge hose with water by opening the valve.
3.
When water begins to exit the discharge hose, turn off the water and raise the end of the hose above the
Flex
-
Gap.
4.
Observe that water is exiting the Flex
-
Gap.
5.
If the water is exiting the Flex
-
Gap, it has passed the test.
6.
If the water is not exiting from the Flex
-
Gap, replace the Flex
-
Gap sleeve and re
-
test.
7.
If the water is not exiting from the Flex
-
Gap after replacing the sleeve and re
-
testing, replace the complete
Flex
-
Gap assembly and re
-
test.
8.
If the water is not exiting from the Flex
-
Gap after replacing the Flex
-
Gap assembly, disconnect the water
supply and replace the complete unit.
DISCLAIMER
Knight LLC does not accept responsibility for the mishandling, misuse, or non
-
performance of the described items
when used for purposes other than those specified in the instructions. For hazardous materials information consult
label, MSDS, or Knight LLC. Knight products are not for use in potentially explosive environments. Any use of our
equipment in such an environment is at the risk of the user, Knight does not accept any liability in such
circumstances.
WARRANTY
All Knight controls and pump systems are warranted against defects in material and workmanship for a period of
ONE year. All electronic control boards have a TWO year warranty. Warranty applies only to the replacement or
repair of such parts when returned to factory with a Knight Return Authorization (KRA) number, freight prepaid, and
found to be defective upon factory authorized inspection. Bearings and pump seals or rubber and synthetic rubber
parts such as
“
O
”
rings, diaphragms, squeeze tubing, and gaskets are considered expendable and are not covered
under warranty. Warranty does not cover liability resulting from performance of this equipment nor the labor to
replace this equipment. Product abuse or misuse voids warranty.
FOOTNOTE
The information and specifications included in this publication were in effect at the time of approval for printing. Knight
LLC reserves the right, however, to discontinue or change specifications or design at any time without notice and
without incurring any obligation whatsoever.
KNI GHT
LLC,
A Unit of IDEX Corporation (www.knightequip.com)
Knight Headquarters
Tel: 949.595.4800
Fax: 949.595.4801
USA Toll Free
Tel: 800.854.3764
Fax: 800.752.9518
Knight Canada
Tel: 905.542.2333
Fax: 905.542.1536
