Pelican Salt-Free Water Softener & Conditioner for 4-6 Bathrooms - NaturSoft NS6 Prevents the calcium and magnesium minerals in your water from forming hard water scale in your plumbing, preventing the clogging of shower heads, faucets and loss of water pressure. The only salt free water softener certified 99.6% effective Wrapped in premium stainless steel to ensure long life, durability and unsurpassed quality Easy to install, zero waste water & requires no electricity to operate WQA gold seal certified NSF/ANSI 61 and NSF/ANSI 42 for structural integrity