Add the water, vinegar, sugar and salt to a small saucepan. Bring to a boil and stir to disolve the sugar and salt. Remove from the heat and allow the brine to cool completely.
Slice the pickling cucumbers, either into coins or spears.
Fill half a large mason jar with sliced pickles then add 2 sliced garlic cloves, ⅓ of the dill, ⅓ of the peppercorns and a pinch of red pepper flakes.
Fill the mason jar completely with more sliced pickles.
Pour the cooled brine over the top until it is covering the pickles.
Add the lid and repeat with the remaining jars.
Place in the refrigerator for a minimum of 24 hours (this will give a real crunchy pickle - they will soften as you leave them in there longer).