He Likitech ThermoWave ACS Expansion Vessel It is the high-performance solution designed for the professional pressure management in Domestic Hot Water (DHW) systemsThis vertical tank ensures maximum system protection and health integrity of drinking water, complying with the strictest international regulations.
Thanks to its fixed butyl membrane and virgin polypropylene inner lining, the ThermoWave™ safely prevents overpressure, eliminates constant dripping, and offers a long service life with a warranty of 5 years (according to the manufacturer's conditions).
💧 Certified Sanitary Quality and Stainless Steel Connection
The ThermoWave™ design focuses on delivering maximum reliability and rigorous compliance with drinking water standards.
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FDA Approval for Drinking Water: The high-grade butyl membrane is certified by the FDA (Food and Drug Administration)ensuring that the water remains suitable for human consumption.
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Anti-rust coating: It incorporates an interior lining of virgin polypropylene, which isolates the water from the metal of the tank body, ensuring sanitary quality and preventing internal corrosion.
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Patented Connection: Water connection manufactured in AISI 304 Stainless Steel, patented for maximum corrosion resistance and ease of installation.
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Maintenance-free design: The air valve incorporates a sealed plug with an anti-leak O-ring, preventing preload loss and eliminating the need for frequent checks.
ThermoWave™ Technical Specifications
This data sheet details the operating capacity and manufacturing materials of the ThermoWave™ Series.
Performance and Construction (PN 10)
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Product Series: ThermoWave™ (Fixed Membrane).
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Use: Domestic Hot Water (DHW).
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Health Certification: FDA Certified Butyl Membrane.
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Nominal Volume Range: 2 liters to 60 liters (0.5 to 15.9 gal).
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Maximum Operating Pressure (PN): 10 bar/150 psi.
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Maximum Operating Temperature: 90ºC/194ºF.
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Factory Precharge Pressure: 1.9 bar/28 psi.
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Water Connection: AISI 304 Stainless Steel (Patented).
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Exterior Finish: Polyurethane paint on an epoxy base.
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Warranty: 5 years.
Documentation and Available Models
We provide you with all the necessary technical information for the installation.
Models and Dimensions:

Frequently Asked Questions (FAQ Page)
What is FDA certification and why is it important in an ACS expansion vessel?
FDA (U.S. Food and Drug Administration) certification of the membrane ensures that the water-contact materials meet rigorous food safety standards. This is crucial in domestic hot water systems, as the water is used for drinking and cooking.
How does the virgin polypropylene coating contribute to the product's lifespan?
The internal lining prevents water from coming into direct contact with the steel of the tank. This eliminates corrosion of the tank body and prevents rust particles from contaminating the drinking water, a key factor for durability and sanitary quality.
Is it necessary to readjust the preload of 1.9 bar before installation?
The preload of 1.9 bar It is ideal for most domestic systems. However, a qualified technician should check and adjust it according to the cold water supply pressure and the installation height to ensure maximum system performance.
📞 Certified Technical Advisory Service
Maximize the performance and safety of your domestic hot water system. If you need help with sizing, selecting the nominal volume, or any other technical details of the Likitech ThermoWave ACS Expansion VesselContact our specialized team. We offer expert assistance to guarantee your investment.