TP-8 is designed specifically to absorb expanded water in closed, hot water systems, protecting water heating systems from excessive pressure and potentially hazardous conditions.
TP-8 has a total volume of 8 liters (2.0 gallons). The tank is designed to safely maintain water pressure levels and is factory pre-charged with nitrogen to 3.5 bar (50 psi) for stable and safe system performance.
With a diameter of 20.3 cm (8.0 inches) and a height of 29.9 cm (11.8 inches), this compact design makes installation quick and convenient alongside standard residential water heaters and plumbing systems.
Product Overview
The TP-8 is an 8-liter (2.0-gallon) thermal expansion tank engineered for residential closed-loop hot water systems. It serves as a critical safety buffer, absorbing thermal expansion to stabilize system pressure and protect your water heater from stress-related damage and relief valve discharges.
Key technical advantages include an FDA-grade polypropylene liner and a heavy-duty butyl diaphragm with an exceptional 400% elongation property. This high-hygiene internal design ensures water never contacts the carbon steel shell, providing a contaminant-free environment and long-term resilience under constant pressure cycles.
Built for superior reliability, the TP-8 features a stainless steel connection with patented Leak Safe technology and a Triple Grade Almond (RAL 1015) epoxy finish. This unit delivers a maintenance-free performance that ensures both the longevity of your system and your absolute peace of mind.
Certification
Specifications and Technical Data
| Parameter | Value |
| Model Number | TP-8 |
| Total Tank Volume | 8 liters / 2.0 gallons |
| Diameter | 20.3 cm / 8.0 inch |
| Height | 29.9 cm / 11.8 inch |
| Net Weight (NW) | 1.9 kg / 4.2 lbs. |
| Gross Weight (GW) | 2.3 kg / 5.1 lbs. |
| Shipping Volume | 0.50 CUF |
| Operating Temperature | 1 - 90°C / 34 - 194°F |
| Factory Pre-charge | 3.5 bar | 50 psi |
| Max. Operating Pressure | 10 bar | 150 psi |
| Connection | 3/4” NPT Stainless Steel |
| Liner Material | Polypropylene (FDA grade) |
| Diaphragm Material | Heavy-Duty Butyl Rubber |
| Shell | Cold Rolled Carbon Steel |
| External Coating | Triple Grade Almond (RAL1015) Paint |
| Pre-charge Gas | 100% Nitrogen |
Key Features & Design Advantages
How the THERMAL-PLUS Pressure Tank Works
In closed hot water systems, thermal expansion occurs naturally as domestic water is heated. The TP-8 works in conjunction with a backflow preventer or check valve to safely absorb this expanded water. It stores the expanded water securely between the heavy-duty butyl rubber diaphragm and the polypropylene liner, while the nitrogen-filled air chamber compresses to accommodate the volume change. By controlling this excessive pressure, it safely maintains water pressure levels and avoids relief valve discharge.
Key benefits
Typical Applications
Frequently Asked Question (FAQ)
The 8-liter (2.0-gallon) TP-8 controls excessive pressure generated inside the water heater by safely storing the additional expanded water volume, preventing hazardous high-pressure conditions in your pipes.
The TP-8 arrives from the factory completely ready to install, featuring a 50 PSI (3.5 Bar) Nitrogen pre-charge.
It features a heavy-duty butyl rubber diaphragm with an incredible 400% elongation physical property. Furthermore, it is constructed from robust cold-rolled carbon steel and coated with Triple Grade Almond (RAL1015) paint for excellent environmental resistance. It also utilizes a nitrogen pre-charge, which effectively controls excessive pressure over a long service life.
Customized Colors & Packaging
We offer a wide range of customization options to match your exact needs - from custom colors to branded packaging and logo design.
Watch our video to explore the possibilities and see how we help your products stand out in the market.
Downloads & Certification Links
Detailed product information and data
Collection of all relevant product certifications.