Specifically made for Above Ground Swimming Pools, The Solaxx Retro Jet with Twist Lock Cord system produces a pure, elemental form of chlorine by electrolysis of salt added to the pool water. After the salt is converted to chlorine and bacteria has been killed, the chlorine reverts back to salt and this process is ongoing. The salt concentration is very low (less than a human tear) and the water feels soft, silky and sparkling clean! Retro Jet Salt Water Generators integrate advanced electronic technology with robust cell construction. Cell construction includes commercial grade titanium cell plates with extra thick housing able to withstand over 100 psi pressure. No safety or performance detail has been overlooked in any aspect of the Retro Jet system. Rated for pools up to 25,000 gallons, the Retro Jet Saltwater System by Solaxx is the perfect choice for above ground pool owners