SZ1220 what? In fact, this code is your best durability assurance. It is a process exclusive to RP Pools which refers to the industry’s highest level of galvanizing - 1,220 g of zinc per square meter - covering the steel panels of RP pools. A protective coating 70% superior to competition. Recent studies conducted by SOREVCO have shown that with such a high level of zinc, the steel panels of your RP pool could easily last for 100 years! In order to offer even better protection against corrosion, RP Pools is also innovating with honeycomb surface walls providing zinc retention more than twice as high as conventional surfaces. In addition, all perforations on the panels are covered with a finish high in zinc.