Yaun Company  received the following notice from OATEYSCS. Propylene Glycol (PG), a petroleum derived material, is the major component of Hercules Cryo-tek Anti-Freeze. It is also used in other industries such as food processing garment manufacturing, and  as a source material for other petrochemicals. Demand for PG has been growing in all industries it is sold to, including our industry. As this demand increase was occurring, there was no capacity added. As demand grew, allocations began from the suppliers of PG, but there was enough available on the spot market to satisfy demand (our recent price increase was a result of this). Recently this changed as the spot market dried up. This left users of PG with shortages as allocations were reduced below last years level. This is a worldwide shortage and will ultimately affect all anti-freeze producers worldwide.

     Oatey will discontinue the production of Cyro-tek AG until further notice. Cyro-Tek100 and Standard Cryo-Tek will continue to be produced. Hercules will not compromise the integrity of the product by "filling in" with recycled material.

     During this period of short supply we encourage you to test existing hydronic systems with our test kit. In some cases, the PH level is low and  inhibitor is needed while, the level of freeze protection is still more than adequate, negating the need to add more antifreeze.

The use of plastic tubing for domestic water supplies is ever increasing.  However, the use of plastic piping necessitates more than ever the proper grounding of installed appliances. 
If for instance a water heater is not properly grounded, the protection afforded by the anode rod will be lost.  In addition and more serious is the fact that the potential for a hazardous shock exists.
In the case of the anode rod, it now becomes the water heater and the water heater becomes the anode.  In so doing, the tank gives itself up to the anode and premature failure will occur.  The most vulnerable areas are around the tank studs.  Rapid deterioration may occur with visible signs such as rusty water or a leaking tank.  The warranty does not cover this type of failure.
Examination of the anode rod may show telltale signs such as dark brown spots and lack of pitting.
Protect your customer and protect yourself.