The Sauermann PH0100SIUN23 pH Safe 1 Neutralization Cartridge is safe, easy-to-install and eco-friendly. It's capable of neutralizing up to 200 gallons (800 liters) of acidic condensates at pH3. The pH Safe 1 has been specifically designed to treat condensates producted by gas condensing boilers. Preserves the plumbing system & the environment, Prevents damage to concrete & plastics, Prevents corrosion on metal parts.