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Hydrastone-lining
The concept of stone-lined water tanks is not a new one, and has been proving successful against corrosion for ages.
Many of the stone-lined tanks are installed are 25-30 years old. In fact, the New England area has been using stone-lined
tanks for years due to their water supply being very acidic and has been devastating to glass lined tanks.
What makes the Alliance SL unique is the Hydrastone-lining. This one half inch lining protects the steel tank from
the corrosive action of water. When the water first 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.
Unique cold water
diffuser to increase
output by 20 percent.
Hydrastone-lining protects
effectively against corrosion.
Larger coil diameter and spacing
designed and positioned for maximum
heating output and minimizes build-up.
Top mount removable heat exchanger
with double o-ring design for easy
installation and service and eliminates
the need for welds between the piping
and the tank.
Two to three inches of polyurethane
foam insulation combined with the
stone lining resulting in extremely
low standby heat loss.
Proprietary TPI
control accurately
controls the output
water temperature
and helps eliminate
tank “overload.”
Note: No anode rod required
Heavy gauge steel
helps increase
integrity of the tanks
Alliance SL
™
The Alliance model AL119SL
utilizes a side mounted coil
that is supplied separately.
27, 35, 50 & 70