ResinTech WACG-HP is a high-purity buffered form gel weak acid cation resin. The HP (high purity) designation means it is Gold Seal Certified by the WQA for use in potable water applications. It is pH buffered with sodium ions to avoid producing a low pH when first placed in use. WACG-HP is intended for all weak acid cation applications and is recommended for cartridge use where potable water certification is required.