ZoneGuard Tankless Series

Name: ZoneGuard Tankless Series
Brand: Stanley Fisher
SKU: ZG-TANKLESS
Price: 399.00 USD
Availability: InStock

Dedicated scale prevention at the tankless water heater. A permanent catalytic core and an optimum treatment range of 0.8–6.1 US GPM (3–23 L/min).

0.8–6.1 US GPM

3/4-inch male NPT

$399.00 USD

U.S. shipping: $30 per order, regardless of Tankless quantity.

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 Tankless Series — approved brochure cover

Download ZoneGuard Tankless Series brochure ↗

The application

Purpose engineered.
For tankless water heating.

A tankless heater concentrates heat into a compact exchanger. Tankless is dedicated to the heater application, within its stated optimum treatment range.

Heater output depends on input, efficiency and temperature rise. A heater’s maximum advertised GPM is not its output at every inlet temperature.

Understand BTU, flow and temperature rise →

Dedicated tankless water-heater scale prevention — application illustration, not an installation drawing — Application illustration. Actual plumbing and installation are project-specific.

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.

Tankless engineering · Two films

The scale problem.
The flow relationship.

Tankless Water Heater Scale Prevention — V9

Tankless Water Heater GPM / BTU / Temperature Rise — V10

Technical specification

A defined operating envelope.

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

Download ZoneGuard Tankless Series brochure ↗

Application: Dedicated tankless water-heater scale prevention
Optimum treatment range: 0.8–6.1 US GPM
Connection: 3/4-inch male 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 dedicated-heater model uses 3/4-inch male 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 Tankless Series brochure contains the approved technical information for this model. Contact Stanley Fisher for project-specific questions.

One technology. Three applications.