Filling liquid — glycerine or silicone

• 250 ml, 1 l or 5 l can (glycerine) • 99.5% vegetable glycerine • 500 ml or 1 l can (silicone) Used as a vibration damper or where water hammer reaches the gauge. The glycerine steadies the pointer and protects the internal mechanism of the gauge. The 250 ml dose of glycerine is intended for gauges of 100 mm diameter.