Here is the one I just installed. Salt water approved by the manufacturer, with a 60 year warranty.
http://www.familypoolfun.com/shop/a...-regency-54-resin-above-ground-pool/riviera18
Notice what the description says
A true round resin top rail in rich chocolate hues creates a sophisticated, up-scale look guaranteed to impress the neighbors. This unique top rail is also impervious to water and chemical damage. U.V. inhibitors imbedded in the resin provide additional protection. Resin bottom rails, stabilizers and bottom and top plates protect the pool from harsh salts used in modern chlorine generators. Advanced steel wall coating techniques will virtually eliminate corrosion. The pool wall is protected by a patented PlastiGuard coating process that ensures it will never rust, and the bottom will never corrode where it contacts the ground. The Riviera Regency uses extra thick gauge steel in its 6 inch wide uprights and wall, and the beautiful non-corroding top rail is injection molded for superior strength. The Riviera Regency pool is super strong and assembles seamlessly with an excellent fit and finish.
The warranty on that pool specifically states that the pool has resin rails, and metal wall and uprights. It says the metal parts are "virtually" rust proof. The the warranty limitations below specifically excludes corrosion of metal parts due to a SWG (subsection f). I would also hazard a guess that if you put bonding lugs into the uprights (likely required by local code) that would constitute altering the design of the pool in section g - voiding the entire warranty
LIMITATIONS OF THE WARRANTY
The present warranty does not cover the following:
a) Damages caused to the material or costs of labor related to the installation or dismantling of the pool, the liner or the accessories, nor reimbursement for any
other labor costs or materials which may be deemed necessary or desirable.
b) Damages caused by water leakage, chemical products or heating system, nor replacement of any object damaged or any loss as a result of the preceding.
c) Personal or material damage of any nature.
d) Damages caused by ice, ice displacement, fire, animals, vegetation, vandalism or acts of God.
e) Damages resulting from normal life-expectancy of pool components.
f)
Damages caused by the utilisation of a salt water chlorination system in combination with a steel pool structure (top ledges, uprights, joiner plates, wall
channels).
g) The warranty is null and void if the design of this product is altered in any way. This pool is designed to be installed as an above ground pool. Improper
installation voids the warranty. Installation below ground level or leaving the pool empty will void this warranty.
h) Corrosion around and beneath the skimmer which includes the square skimmer opening and the round return opening are specifically not warranteed. Refer to
the skimmer maintenance instructions as well as the pool instructions.
It also pro-rates very quickly. This is the percentage of list price you will pay for replacement parts, plus shipping nad handling to return the defective parts and ship the new ones.
In other words, after 10 years, the warranty is basically useless.
During the first three years 0%
During the fourth year 40%
During the fifth year 45%
During the sixth year 50%
During the seventh year 60%
During the eight year 65%
During the ninth year 70%
During the tenth year 75%
Eleventh thru sixtieth year 80%
*** There will be a 10% Service and Handling Charge on the list price of all items ordered
So it boils down to a 10 year warranty that covers all parts if you don't use a SWG and it covers the resin parts if you do use a SWG.
Most warranties are not worth the paper they are printed on, given all of the loopholes, outs, and limitations
-dave