Hydrotech Precision-PWS 8-M_8-MST OWNERS GUIDE - Manual (Page 19)

2. Refer to the Sight Gauge Installation Diagram above. Remove
the plastic hex jam nut from the threaded body of the valve (leaving
water gasket on threads).
3. Remove the storage tank lid by holding down on the lid and turning
the black knob counter clockwise approximately five turns. Slide
the lid to one side and turn the knob and lid while tilting. This
should allow the Tee Bar bracket under the lid to come out of the
tank opening. Slide the lid out.
4. Push the gasket tightly up against the valve.
5. Insert the threaded valve end with gasket attached through the hole
on the front of the storage tank.
6. While holding the sight gauge with valve in the storage tank hole
with one hand, insert your other hand with the plastic hex jam nut
through the storage tank lid opening.
7. Place the hex nut onto the threaded end of the valve.
8. Hand tighten the hex nut clockwise onto the valve.
Tightening Sight Gauge Nut Diagram
9. Refer to the Tightening Sight Gauge Nut Diagram above. To
fully tighten the nut, turn the valve counter-clockwise1/4 of a turn to
the start position and ensure that the jam nut is still hand tight.
Holding the jam nut, turn the valve clockwise until upright at the
finish position.
NOTE: The sight glass is fragile, do not push on the gauge (push on
bottom near threaded area).
10. Make sure the storage tank is free from any dust or material and
replace the storage tank lid.
11. Check for leaks when storage tank begins filling.
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