2.5
Installing Injection/Back Pressure Valve
A fitting or tee with 1/2” NPTF threads and with sufficient depth will accept the injection
valve assembly. If required, trim off an amount of the extension tip until it fits your fitting
or tee. (Fig. 6.)
The position of the injection/back pressure valve can be at any orientation as long as the
spring is retained in the valve. DO NOT REMOVE THE SPRING. Be sure to check and
replace the spring as needed. Attach the tubing following the same instructions in section
2.3, connecting the supply tubing.
In addition to preventing backflow from pressurized lines, the injection valve acts as a
back pressure valve when pumping into atmosphere or low pressure applications.
IMPORTANT:
Always install the injection/back pressure valve at the end of the
discharge tubing to prevent over-pumping in atmospheric or low pressure situations.
Figure 6 Injection Valve
See Section 5.0 for complete liquid end parts list and exploded view.
2.6 Electrical
WARNING: Risk of electrical shock!
This pump is supplied with a grounding
conductor and grounding-type attachment plug. To reduce the risk of electrical shock, be
certain that it is connected only to a properly grounded, grounding type receptacle.
Connect the pump power cord to a GROUNDED outlet supplying proper voltage. Avoid
branch circuits that also supply power to heavy machinery or other equipment that could
generate electrical interference.
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