The mighty Led Zeppelin, coming off the back of an insanely successful 1973 US tour that packed 56,800 worshippers into Tampa Stadium in Florida and in so doing broke the Beatles' attendance record. The news that the group's next release will be a double album does not fill the hipper critics with unbridled enthusiasm.
Phosphate Inhibitor Addition. This method of corrosion control is based on the theory that the addition of phosphate to a finished water will result in the formation of low-solubility lead-phosphate complexes on interior pipe surfaces.The protective layer acts as a barrier to corrosion, reducing dissolution of lead into the water.hosphate Inhibitor Addition. This method of corrosion control is based on the theory that the addition of phosphate to a finished water will result in the formation of low-solubility lead-phosphate complexes on interior pipe surfaces.
1 Copper and PVC water pipes are relatively non-toxic. 2  Copper is a natural material that has been proven to be safe to health. 3  PVC pipes are also safe. 4  Lead on the other hand is extremely toxic. 5  Lead is corrosive and can leak into the drinking water system. PVC is likewise a safe material to carry drinking water. 2  Copper and PVC water pipes do not suffer easily from corrosion, while iron corrodes relatively easily. 3  Copper is relatively easy to work with because it is much softer than iron or lead.