Zilmet USA

Name

Zilmet USA

Legal name

Zilmet USA

Website

https://zilmetusa.com

Company type

Private

Founded year

2012

Operating status

Operating

Headcount range

11–50 employees

Short description

Zilmet USA manufactures and distributes expansion tanks, hydronic heating components, and water conditioning products for residential and commercial plumbing and HVAC markets. It sells exclusively through US wholesale distributors as a subsidiary of Italy-based Zilmet, the world's largest expansion tank producer.

Ownership category

akta.pro rank

Product category

Hydronic Heating Equipment and Plumbing Components

NAICS

Plumbing and Heating Equipment and Supplies (Hydronics) Merchant Wholesalers (423720), Warm Air Heating and Air-Conditioning Equipment and Supplies Merchant Wholesalers (423730), Hardware, and Plumbing and Heating Equipment and Supplies Merchant Wholesalers (4237)

SIC

Wholesale-Hardware & Plumbing & Heating Equipment & Supplies (5070)

akta.pro primary industry

HVAC, Water Heaters & Indoor Air Quality Distribution (CRAOAFAJ)

akta.pro secondary industry

Water & Home System Care (Water Softeners, Septic Treatments, Drain/Openers, Appliance Cleaners) (CRADAKAK)

Keywords

• Expansion tanks
• Hydronic heating equipment
• Water conditioning systems
• Magnetic filters
• Heat exchangers

Headquarters

HQ city

Andrews

HQ country

United States

HQ region

North America

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Personnel, Technology or R&D, Marketing or Sales, Infrastructure

Revenue model

1. Hydronic/Plumbing Equipment Sales: Zilmet USA generates revenue through the sale of hydronic heating equipment, water conditioning products, expansion tanks, buffer tanks, heat exchangers, and accessories. Products are sold exclusively through wholesale distributors and dealer networks. The company does not sell directly to consumers or authorize online resale.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels7 records

Core offering

Zilmet USA manufactures and sells expansion tanks, hydronic buffer tanks, water conditioning systems (ActivFlo), magnetic filters, and brazed plate/plate-and-frame heat exchangers for residential and commercial heating and cooling applications. Products are sold exclusively through wholesale distributors and dealer networks across the U.S., with online resale prohibited and warranty support provided only through authorized wholesale channels.

Product overview

Zilmet USA is a manufacturer of expansion tanks and hydronic system components for residential and commercial heating/cooling applications. The product portfolio is organized into Residential Products (well tanks, thermal expansion tanks, hydronic expansion tanks, buffer tanks, and water conditioning), Commercial Products (larger-capacity versions of expansion tanks, hydro-pneumatic tanks, air/dirt separators, buffer tanks, hydraulic separators, shock/surge tanks), ActivFlo Water Conditioners (scale prevention via galvanic technology), Magnetic Filters (sludge and magnetite capture), Heat Exchangers (brazed plate and plate & frame), and Accessories (boiler trim kits, valves, connectors). Products are sold exclusively through wholesale distributors and are not available for direct consumer purchase. The company offers sizing tools, installation manuals, and data submittals to support specification and installation.

Differentiator

Problem solved

Functional benefit

Brands

• ActivFlo: Water conditioning product line for whole house and commercial applications. Includes ActivFlo Whole-House, ActivFlo Lite, ActivFlo Nano, and ActivFlo Solo variants.
• Buffer Tanks
• Hydro Plus Well Tanks
• Stainless Steel Expansion Tanks
• ZEP1
• Mag Pro
• Brazed Plate Heat Exchangers

Products and services

• ActivFlo Whole-House Water Conditioner Whole-house water conditioning system that prevents scale buildup using galvanic technology; stainless steel housing, no power or salt required, 15-year product warranty; for residential plumbing and water heating systems.
• ActivFlo Lite Scale Inhibitor Point-of-use water heater protection device using galvanic scale inhibition; designed for traditional and tankless water heaters with 12-year warranty.
• Tankless Protection Kit (ZTPK) Complete expansion and scale protection kit for tankless water heaters combining the ZEP1 Thermal Expansion Tank and the ActivFlo Lite ZAFL2234 Scale Inhibitor.
• Residential Buffer Tanks (ZBT) Hydronic buffer tanks for residential heating system balancing; welded steel tank, closed-cell urethane insulation, 5-year warranty, max pressure 60 psi, max temperature 200°F.
• Flat Hydronic Expansion Tank (ZFT) Compact hydronic expansion tank for wall-hung condensing boilers; welded mounting bracket and union connection for quick installation.
• Hydronic Expansion Tanks (ZHT) Expansion tanks for hydronic heating systems with certified synthetic SBR rubber diaphragm; available in various sizes with factory precharge of 12 psi.
• ZEP1 Thermal Expansion Tank Thermal expansion tank for tankless water heaters; 150 PSIG max working pressure, 50 PSIG factory precharge; all-304 stainless steel construction with serviceable air charge and butyl membrane diaphragm.
• Thermal Expansion Tanks Expansion tanks for thermal expansion control in residential water heating systems; external epoxy-polyester coating and protected pre-charge valve.
• Hydro Plus Well Tanks NSF 61 certified well tanks with seamless low-permeability butyl diaphragm; MIG welding, powder-coated exterior, 5-year limited warranty, max 150 psi and 210°F.
• Ultra Pro Well Tanks (ZUP) Replaceable-bladder well tanks with 150 PSIG max working pressure, powder-coated finish, and full line of replaceable bladder options.
• Stainless Steel Expansion Tanks (ZS) 304 stainless steel expansion tanks with butyl diaphragms for hot and cold water; Inox Pro (fixed diaphragm) and Ultra Inox-Pro (replaceable bladder) versions.
• Hydraulic Separator (ZHS) Low-loss hydraulic separator supporting flow rates up to 40 gpm for residential and light-commercial applications; welded baffles and dual accessory ports.
• Boiler Trim Kits (ZBTK) Complete boiler trim solution including multi-isolation valve, backflow prevention device, boiler fill valve, microbubble deaerator, and 4.8-gallon heating vessel.
• Magnetic Filter and Dirt Strainer (ZMF) Residential magnetic filter with neodymium 11,000 Gauss magnet for sludge protection; quarter-turn bypass and detachable swivel filter body; 5-year warranty.
• Radiant Hydronic Expansion Tank (ZHT-R) Expansion tank for low-temperature radiant floor heating systems; polypropylene liner to prevent corrosion and compatible with glycol up to 50%.
• ZMIX Thermostatic Mixing Valve Thermostatic mixing valve with temperature adjustment range 95°F to 140°F; internal non-return valve, temperature gauge, stainless steel hose.
• Commercial Hydronic Expansion Tanks (ZETA, ZELA) ASME-rated commercial hydronic expansion tanks available with full-acceptance diaphragm or replaceable bladder; max 125 PSIG, 240°F, pre-charge 40 PSIG.
• Hydro-Pneumatic Tanks (ZHXT, ZHXA) Commercial hydro-pneumatic tanks for water supply systems; replaceable-bladder version up to 125 PSIG, fixed-diaphragm version up to 200 PSIG.
• Air and Dirt Separators (ZADS, ZADSN) ASME-rated separators to eliminate entrained air and separate debris from hydronic systems; available with or without removable cartridges and optional magnetic filtration.
• Commercial Buffer Tanks (ZCBT, ZHBT) ASME-rated buffer tanks for chilled and hot water systems; 2- or 4-port configurations with NPT or flange connections; max 125 PSIG, 450°F.
• Glycol Make-Up Packages (ZGMP) Automatic glycol makeup packages for closed-loop systems; single, dual, or alternating twin pump configurations with 1/2 HP pump.
• ActivFlo Commercial Water Conditioner Commercial-scale water conditioning system with NPT connections (up to 87 GPM) and flanged connections (up to 925 GPM); max 232 PSIG, 210°F.
• Commercial Magnetic Filters (ZM, ZMA) MagPro and MagPro Plus commercial magnetic filters with self-closing filter baskets; MagPro max 145 psi, 230°F; MagPro Plus max 145 psi, 203°F with 2- to 6-inch flanged connections.
• Mag Pro Magnetic Filter (ZM) Magnetic filter with integral stainless steel filter basket, 100-micron mesh gauze, and self-closing valve; connection sizes 1/2 to 2 inches; max 145 PSIG, 230°F.
• Mag Pro Plus Magnetic Filter (ZMA) High-capacity magnetic filter for commercial applications with large chamber and inlet/outlet pressure gauges; flanged connections 2 to 6 inches; max 145 PSIG, 203°F.
• Brazed Plate Heat Exchangers (ZB) 316 stainless steel brazed plate heat exchangers with copper brazing for boiler components, hot water production, pool heating, solar systems, and refrigeration applications; compatible with high-pressure refrigerants including R410A.
• Plate and Frame Heat Exchangers (Z2, Z3, Z4) 316L stainless steel plate heat exchangers with EPDM gaskets; max 284°F working temperature; for sanitary hot water, district heating, and industrial process heat recovery.
• Backflow Prevention Device (ZU00) Brass backflow preventer with internal stainless steel filter; available in 1/2 NPT and 1/2 SWT versions; max 175 PSIG operating pressure.
• Boiler Fill Valve (ZU0007) Automatic filling unit for closed hydronic systems with isolation valve and adjustable pressure control (7.5-100 PSIG); max 150 PSIG, 230°F.
• Microbubble Eliminator (ZU0001) Deaerator for venting trapped air in closed systems up to 150 PSI; triple stainless steel gauze and bi-directional flow; available in 3/4 to 1-1/4 inch NPT or SWT.
• Multi-Isolation Valve (ZU0020) Isolation valve allowing complete isolation for inlet flow, expansion vessel, and live system; anti-tamper locking handle and drain port; 1/2 NPT connection.
• Tank Tee Kits (ZTK) Complete tank tee packages including brass tank T with swivel union, pressure switch, pressure gauge, boiler drain, and relief valve; available in 1 and 2 inch connections.
• Tank Tees (ZTT) Tank tees for Zilmet Hydroplus side-connection well tanks; available in 1 and 1-1/4 NPT with union; max 125 PSIG, 240°F.
• Union Connection (ZFT-U) Union connection fitting accessory for tank installations.

Quantifiable outcome

• Up to 50% less soap and washing detergent needed with ActivFlo
• +3 more outcomes

Named customers2 records

Segments3 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

One partnership is on record.

• Georgetown/Horry Technical College (GOHGTC)coreStrategic or Co-development Partner · 25 June 2025Workforce development partnership with local technical college. Zilmet USA sponsors the Welding Program at GOHGTC, with graduates becoming eligible for employment at Zilmet's manufacturing facility. Recent graduates Sharon Windley, Wally Miller, and Patrick June earned their certificates of completion from this program, representing Zilmet's investment in creating skilled jobs in the local community.

Scale indicators3 records

Recent moves7 records

Expansion highlights5 records

Direct peers

• Caleffi Hydronic Solutions: Caleffi is an Italian-founded manufacturer of hydronic components, balancing valves, air/dirt separators, and boiler trim sold globally and in the US through wholesale. It overlaps with Zilmet USA's hydronic accessories, hydraulic separators, and boiler trim kits, and competes head-to-head in similar distribution channels.
• Amtrol (Watts Water Technologies): Amtrol is a leading US manufacturer of well tanks, hydronic expansion tanks, and thermal expansion tanks, the closest direct competitor to Zilmet USA's core expansion tank and hydronic product lines. Both serve plumbing wholesalers and contractors across residential and commercial segments.
• Flexcon Industries: Flexcon is a US manufacturer of well tanks, pressure tanks, and hydronic expansion tanks distributed through plumbing wholesalers. Its product mix overlaps Zilmet USA's Hydro Plus and Ultra Pro well tanks and ZHT hydronic expansion tank lines for residential and light commercial.
• Armstrong Fluid Technology: Armstrong designs pumps, heat exchangers, and hydronic system equipment including expansion tanks and buffer tanks for commercial HVAC. It competes with Zilmet USA's commercial heat exchangers and hydronic system components in the engineering-specifier channel.
• Wessels Company: Wessels manufactures ASME and non-ASME pressure tanks including hydronic expansion tanks, hydro-pneumatic tanks, and buffer tanks sold through US wholesalers. It directly competes with Zilmet USA's ZETA, ZELA, ZCBT, and ZHXT/ZHXA commercial tank lines.
• Reflex Winkelmann: Reflex is a European-based manufacturer of expansion tanks, pressurization systems, and water treatment for hydronic heating. It is a direct global category peer to Zilmet parent and competes in commercial and residential expansion tank segments distributed through wholesale channels.
• Taco Comfort Solutions: Taco designs and manufactures hydronic equipment including expansion tanks, buffer tanks, air separators, and circulators for residential and commercial heating systems. Its product range and US wholesale distribution model directly overlap Zilmet USA's commercial and residential offerings.
• Bell & Gossett (Xylem): Bell & Gossett manufactures hydronic system components including expansion tanks, air separators, buffer tanks, and heat exchangers sold through wholesale distribution. It directly competes with Zilmet USA's commercial hydronic portfolio in mechanical contractor specifications.

Broad incumbents

• Spirax-Sarco Engineering: Spirax-Sarco is a global leader in steam and thermal energy solutions including heat exchangers, controls, and fluid handling. Its plate heat exchangers and brazed plate products compete with Zilmet USA's ZB and Z2/Z3/Z4 plate heat exchanger lines in industrial process applications.
• Watts Water Technologies: Watts Water is a broad US incumbent in water and plumbing products including expansion tanks, backflow preventers, valves, and water treatment. Its Amtrol subsidiary directly competes with Zilmet USA; Watts' portfolio breadth and scale make it a benchmark for category presence in plumbing wholesale.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks7 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/channel/UCLXpdwjJrax5B_RO_2u6pFg
• Facebookfacebook.com/ZilmetUSA
• LinkedInlinkedin.com/company/zilmet-usa
• Instagraminstagram.com/zilmetusa
• Xx.com/ZilmetUSA

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Zilmet USA