Aqualife RO tanks are constructed using the finest FDA approved materials available. The storage tank is assembled using a virgin polypropylene liner, high grade chlorobutyl diaphragm and patented stainless steel water connection. In addition every diaphragm is post cured to remove any harmful chemicals prior to assembly. With regards to structural integrity, deep drawn steel domes and precision weld seams give Aqualife reverse osmosis tanks unparalleled reliability. The tanks are quality tested at multiple stages in the production process. In addition tanks are built with sealed brass air valves and o-ring sealed air valve caps to ensure leak free air chambers.