The Stanley Fisher ZoneGuard Plus is a high-performance whole-house water crystallizer engineered to prevent scale build-up in residential systems serving up to 2 full baths. Designed for main-line installation, ZoneGuard Plus delivers reliable scale control without chemicals, salt, or electricity.
Utilizing advanced catalytic crystallization technology, dissolved hardness minerals are converted into stable microscopic crystals that remain suspended in the water rather than adhering to water heaters, fixtures, and internal plumbing surfaces.
Ideal for mid-size homes, ZoneGuard Plus helps maintain appliance efficiency, extend equipment service life, and reduce scale-related maintenance while operating completely maintenance-free.
ZoneGuard Plus is a high-performance in-line water crystallizer engineered for whole-house residential installation serving homes up to 2 full baths. Designed for main-line integration, the system delivers maintenance-free scale prevention without chemicals, salt, or electricity.
Utilizing advanced catalytic crystallization technology, dissolved hardness minerals are converted into stable microscopic crystals. These crystals remain suspended in the water rather than adhering to water heaters, fixtures, and appliance surfaces, reducing scale build-up throughout the plumbing system.
Constructed with a durable stainless steel housing and certified materials suitable for potable water systems, ZoneGuard Plus provides reliable, long-term protection across diverse residential water conditions.
Maximum Flow: Up to 12 US gpm (serves homes up to 2 full baths – 3 to 5 people)
Maximum Working Pressure: 145 psi
Maximum Fluid Temperature: 185°F
Connection Size: 1″ NPT
Housing Material: Stainless Steel
Certifications: NSF / ANSI 61 & 372
Warranty: 10 Year Limited Warranty
Designed for whole-house residential protection, ZoneGuard Plus utilizes advanced catalytic crystallization technology to convert dissolved hardness minerals into stable microscopic crystals. The system operates without chemicals, salt, electricity, or ongoing maintenance.
Whole-house scale prevention
Residential plumbing systems (up to 2 full baths)
Water heaters and tankless systems
Fixtures and faucets
Household appliances
Main-line residential water treatment installations
Complete product documentation, installation guidelines, dimensional drawings, performance certification data, and technical specifications for the Stanley Fisher ZoneGuard Plus are available within the Product Search system. Select the specific model to access detailed information and downloadable literature.
Documentation includes installation instructions, flow capacity guidance, dimensional data, material specifications, certification details, and application recommendations for whole-house residential scale prevention systems serving up to 2 full baths.