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1700 Inverted Vent Check Valve Test
1500-MC Vertical Vent Check Valve
1500 Vertical Vent Check Valve Test
1600 Tank Air Escape Valve
3000 Manhole Scrubber


REQUIRED MEASUREMENTS:
A: Manhole Frame Diameter (flat bearing surface)
B: Inside Frame Diameter (clear opening)
C: Drop Ring Diameter
D: Drop Ring Depth (from cover underside, outside edge)
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