Type 20 Zinc anode

Specific weight: 7

Magnesium anodes can be used in brackish water if the resistivity exceeds about 1

Caterpillar pencil anode complete with brass plug th

Not sure which type of material to use

MAGNESIUM ANOD I BACKFILL 7.7KG/17lbs, 1.7V, inkl 5m, 10mm2 röd XLPE/PVC Hole distance_267mm/10.51in Type 20 Zinc anodeMagnesium Anode Bag 17lb 45lb 1. 7V, INCL 16,4ft. of 8 gauge red XLPE PVC cable Looking for a smaller size? Checkout the 9lbs version here With the right amount of anodes you can provide complete cathodic protection to your underground installation. Done correctly, this will provide immunity to corrosion for tanks, piping, sheet pilings, etc. Meaning that your underground object doesn't need to be changed because of corrosion for many years to come.