ZoneGuard Pro Series — authentic current product

STANLEY FISHER · ZONEGUARD

Higher-demand whole-home scale protection

ZoneGuard Pro Series

Scale protection for higher-demand homes. Stainless-steel hardware, a permanent catalytic core and capacity up to 20 US GPM.

Up to 20 US GPM

1-inch NPT

$1,199.00 USD

Free U.S. shipping. Orders that also contain Tankless have one $30 shipping charge.

Made to order in England. Please allow up to 3 weeks for dispatch. Transit time begins after dispatch and varies by destination and carrier. Tracking is supplied after shipment.

Ships from the UK. Import duties, tariffs, taxes, customs and carrier/brokerage charges are not included in the product price or shipping charge and are the recipient’s responsibility unless applicable law requires otherwise. Shipping & Returns

ZoneGuard Pro Series — approved brochure coverDownload ZoneGuard Pro Series brochure ↗

The application

Higher demand.
The same engineered principle.

Larger homes can place several branches of the distribution system under demand at once. Pro is the higher-capacity whole-home option, rated up to 20 US GPM.

Four 2.5 GPM showers plus two 2.2 GPM faucets total 14.4 US GPM. This illustrative demand is not a sizing guarantee or a Pro test result.

Higher-demand whole-home scale protection — application illustration, not an installation drawing
Application illustration. Actual plumbing and installation are project-specific.
Conceptual view of water interacting with the permanent catalytic core

Permanent catalytic core

Address scale formation.
Keep the minerals.

ZoneGuard’s catalytic crystallization approach encourages dissolved hardness minerals to form microcrystals carried with the water, rather than bonding as scale to surfaces.

It does not remove hardness minerals and does not produce softened water. No salt regeneration, electrical power or replaceable filter media is required.

Read the evidence and its limits →

Technology image illustrates the shared principle; it is not a dimensioned internal assembly.

Technical specification

A defined operating envelope.

Match flow, pressure, temperature and connection size to the intended application.

ZoneGuard Pro Series — approved brochure coverDownload ZoneGuard Pro Series brochure ↗
Application
Higher-demand whole-home scale protection
Published capacity
Up to 20 US GPM
Connection
1-inch NPT
Maximum pressure
145 psi
Maximum liquid temperature
185°F
Housing
Stainless steel

Before you choose

Questions, answered.

Is this a water softener?

No. ZoneGuard does not remove calcium or magnesium. It addresses scale formation through catalytic crystallization, without salt regeneration.

How should I select the model?

Choose the application first, then verify actual peak flow, supply conditions and the published operating limits. Tankless is dedicated to tankless heaters; Plus and Pro serve whole-home applications. Do not count the same hot-water flow twice.

Does it replace heater maintenance?

Follow the water-heater manufacturer’s maintenance and water-quality requirements. Do not treat scale-prevention equipment as permission to disregard those requirements.

Who should install it?

Use a qualified installer and the applicable model instructions. This whole-home model uses 1-inch NPT connections. Typical installation time: approximately 30–60 minutes, depending on site conditions and existing plumbing. Application illustrations are conceptual.

Where can I find model-specific information?

The downloadable ZoneGuard Pro Series brochure contains the approved technical information for this model. Contact Stanley Fisher for project-specific questions.

One technology. Three applications.

Choose the right ZoneGuard.

Dedicated tankless protection. Whole-home coverage. Higher-demand homes. Each model has a defined application and operating envelope.

Choose by application and actual peak flow, not fixture count alone. Published capacities are not guarantees of simultaneous fixture performance.