TP-40 is a high-capacity expansion tank specifically engineered to absorb expanded water in closed, hot water systems as domestic water is heated.
TP-40 has a total volume of 40 liters (10 gallons). Built for safe and demanding continuous use, this tank is designed for a robust maximum operating pressure of 10 bar (150 psi) and a maximum operating temperature of 90 °C (194 °F).
It is factory pre-charged with nitrogen to 3.5 bar (50 psi) for highly stable and safe system performance. With a diameter of 35.5 cm (14.0 inches) and a height of 43.0 cm (16.9 inches), this highly durable tank is ideal for mid-sized commercial and large-scale residential water heating setups requiring superior thermal liquid expansion management.
Product Overview
The TP-40 is a 40-liter (10-gallon) thermal expansion tank engineered to maximize the safety and efficiency of mid-to-large scale hot water systems. It serves as a robust safety buffer, absorbing thermal expansion to stabilize system pressure and protect your water heater from structural stress and relief valve discharges.
Key technical advantages include an FDA-grade polypropylene liner and a heavy-duty butyl rubber diaphragm that completely isolates water from the carbon steel shell. This high-hygiene internal architecture ensures a contaminant-free environment and superior pressure regulation, making it ideal for demanding potable water applications.
Built for long-term reliability, the TP-40 features a premium stainless-steel connection and a Triple Grade Almond (RAL 1015) epoxy finish for superior corrosion resistance. 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-40 |
| Total Tank Volume | 40 liters / 10 gallons |
| Diameter | 35.5 cm / 14.0 inch |
| Height | 43.0 cm / 16.9 inch |
| Net Weight (NW) | 5.9 kg / 13.0 lbs. |
| Gross Weight (GW) | 6.8 kg / 15.0 lbs. |
| Shipping Volume | 2.12 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-40 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)
No. The TP-40 utilizes an FDA-grade polypropylene liner and a heavy-duty butyl rubber diaphragm to separate the water from the tank shell. This completely isolated water zone prevents the tank from rusting and ensures your water remains clean.
With a 40-liter (10-gallon) capacity and a robust 150 PSI (10 Bar) maximum working pressure, the TP-40 utilizes a substantial 50 PSIG nitrogen air cushion to safely maintain pressure levels and absorb expanded water in demanding water heating systems.
Aquasky uses a 100% Nitrogen pre-charge because nitrogen is a highly stable gas. Unlike regular air, it resists permeation and does not drastically expand or contract with temperature changes, providing a much more reliable compressible air cushion to protect your system.
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.