Six construction facts you can verify against the cross-section and the published spec sheet.
Cover machined from 1.0 mm SS304, edges rolled, rim folded inside.
Outer housing pressed from 0.8 mm SS304, no painted steel on contact surfaces.
Inner tank fabricated from 1.2 mm SS304, full-perimeter welded — no glued seams.
Lead-free waterways throughout, CCK Korea–imported PE pipe between the tank and the fill point.
Heavy-gauge construction sized for daily commercial refill cycles, not residential duty.
Full certification and procurement notes live on the S1 product page and PT-1359 manual.




