SECTIONS OF RMC IN PVC RUN

[ActionDave]

Then what the heck is the Zinc finish for? I thought the hot dip galvanizing was an integral part of RMC, so that it curtails corrosion, with the zinc coating forming a sacrificial oxide barrier that protects the steel core.

Depending on the soil conditions it works okay for ten or more years. Other places I have seen get pretty corroded in as little as five, especially where it comes out of the ground.