Hanna Instruments bl 7916 User Manual

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• Repeat the same installation procedure for the hose connections

on the discharge end with the injection assembly (HI 721004)

• Secure the hose so that its movement is minimized when the

pump is operating. Excessive hose movement could cause the
connectors to loosen and result in leakage.

Assembling the Hose to the Valve
The end of the valve is specially tapered
to form a leak free seal when the hose is
properly installed.
Be sure to seat the hose completely so
that there is no gap. Push the hose until
it covers the end of the valve completely.

Suction and Discharge Valves
The suction and discharge valves located
on the pump head should not be inter-
changed as they are different internally.
The discharge valve is fitted with a valve
guide and will not function properly if
used on the suction side.

Hose Connections
• Cut a long enough section of the

hose to reach the suction valve of the
pump head from the feed tank. Al-
low some slack in the hose and be
sure it is not kinked or twisted.

• Slip a hose connector onto the hose

over the head valve and up to the
bottom of the threads ensuring it is
fully seated.

• Slide the connector up to the threads

and tighten to form a seal.

• Slip the ceramic weight (HI 721008)

and a connector over the other end
of the hose.

• Attach the foot valve assembly

(HI 721005) to the hose and slide
the connector up to the threads and
tighten to form a seal.