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Stop Check Valve Installation
Installation:
The new design will apply only to the 2” thru 4” stop valves. Retrotting a eld installation will
require replacing the bonnet assembly.
The bonnet must be installed with the spring towards the bottom (see illustrations above).
The drill xture is designed so that the hole for the spring will always be drilled on the oppo-
site side from the cast-in Vilter name on the bonnet. From the outside of the valve, the casting
numbers must always be towards the top of the valve.
See Operation Section on Stop Check Operation.
Correct
Wrong Wrong
Correct
Verify the location of the Spring and note the Vilter name.