Brochure

Hydrastone Lining (Alliance SL)
The concept of stone-lined water tanks is not a new one,
and has been successful against corrosion for ages.
In New England, a region prone to highly acidic water
conditions, stone lined tanks are the norm. Actually, It’s
not uncommon to find one in service for 30+ years.
What makes the Alliance SL unique is the Hydrastone-
lining itself. This 1/2” tank liner, comprised of a proprietary
material similar to cement, protects the outer steel of the
tank vessel from the corrosive action of water. When water
initially enters the tank, it is absorbed into the Hydrastone-
lining permanently. This water loses its oxygen and
becomes inert, non-corrosive water which then acts as
a protective wall between the hot water and steel tank.
This unique process and design makes Alliance SL water
heaters a great choice for domestic hot water applications.
The Science of Protection
Thermoplastic Lining (Alliance LT)
The greatest enemies of any water heater are corrosion
and rust. The best defense against those enemies is to
avoid tank materials that can rust or corrode. By utilizing
a proprietary double-bonded thermoplastic tank liner, the
Alliance LT can handle even the most aggressive water
conditions by continuously replenishing and rebalancing
antioxidant levels throughout the storage vessel. This
means that the tank won’t rust, and the thermoplasic
construction will keep the tank performing over its long
service life.
Aggressive water with oxygen
attacks liner, depleting antioxidants
Phase 2 Phase 3 Phase 4
Phase 1
The vessel lled with water.
Liner Reinforced
Outer Liner
Antioxidants
Replenish Area
With Shortage
Antioxidants
Rebalance
Premium
Insulation
Antioxidants migrate to areas where
antioxidants have been depleted
Continuous Cycle
Water