Whirlpool WHES30 30,000 Grain Water Softener - Built in USA - Salt Saving Technology - NSF Certified Whirlpool WHES30 is ideal for households of 1-4+ people and removes up to 8ppm of clear water (ferrous) iron NSF certified to reduce hard water symptoms such as embarrassing stains, build-up on your plumbing and faucets as well as spotting on dishes Whirlpool water softeners automatically calculate how much salt and water is required to regenerate and only use what is necessary, resulting in a significant salt and water savings Full 1-year parts and labor warranty. The system warranty can be extended to 2 years parts and labor when you buy 3 bottles of Whirlpool WHEWSC water softener cleanser (sold separately) Designed, engineered and assembled in the USA. Questions? Call the Whirlpool helpline at (866) 986-3223.