Best brand of expansion tank for the home, Watts vs Gitral comparison
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Watts and Gitral expansion tanks are two recognized brands for heating and domestic hot water systems, but they differ in their design, materials, and market positioning.
Characteristics of Watts Expansion Tanks
Watts models are characterized by robust construction and an interchangeable EPDM bladder resistant to heating additives and temperatures up to +100°C.
Their operating pressure reaches 8 to 10 bar depending on the model, with a test pressure up to 11.4 bar, which provides a good safety margin.
Watts tanks are also individually tested entirely (underwater air test), ensuring reliability, and come with a 2-year warranty.
Finally, most models feature a food-grade interchangeable bladder, suitable for sanitary installations.
Characteristics of Gitral Expansion Tanks
Gitral is a French manufacturer specialized in this field for nearly 50 years.gitral
Their Hydrochaud range of expansion tanks are coated with an internal food-grade epoxy lining and use a Butyl membrane, ensuring no contact between water and the metallic wall.
They can withstand a maximum pressure of 10 bar and temperatures up to +99°C.
Gitral also highlights its long-life label, ACS and CE compliance, and individual overpressure testing, which guarantees excellent long-term performance.
Users emphasize hot water savings and an increased lifespan for the safety unit.
Watts vs Gitral Comparison
| Criterion | Watts | Gitral |
|---|---|---|
| Origin | European manufacturing (often Italy or France) | French manufacturing (Auvergne) gitral |
| Membrane type | Interchangeable EPDM | Fixed Butyl, internal epoxy coating |
| Max pressure | 8 – 10 bar | 10 bar |
| Max temperature | +100°C | +99°C |
| Quality control | Individual underwater air test | 50% higher overpressure |
| Strengths | Replaceable bladder, easy maintenance | Made in France, no water-steel contact, durability |
| Average price | Slightly lower | Slightly higher but reputed to be more durable |
Verdict
Watts tanks stand out for their interchangeable bladder and easy maintenance, while Gitral offers French manufacturing quality with high-level sanitary and durable internal materials.
Many installers consider Watts ideal for a good quality/price ratio, while Gitral often remains the "high-end" choice for durability and strict French compliance.
Opinions of heating engineers and plumbers in France
On plumbing and heating forums, the majority of craftsmen consider Gitral a high-end brand, known for its long-term robustness and French manufacturing. Several plumbers specify that Gitral and Flexcon have similar performances, but Gitral stands out for its superior quality positioning and increased membrane durability.
Gitral tanks are often praised for their Butyl membrane and absence of water-steel contact, which prevents corrosion and extends lifespan, especially on Hydrochaud models. Feedback mentions very low long-term maintenance, but a slightly higher price than Watts.
Conversely, Watts receives favorable reviews for its practicality and good value for money. In several technical discussions, professionals explain that its interchangeable bladders are a major asset, as they allow for repairs without replacing the entire tank body, which appeals to installers keen on quick maintenance. Some heating engineers also highlight the consistent European manufacturing quality and good pressure resistance.
Reliability Feedback
Craftsmen agree that:
- Watts is more economical and easier to maintain, ideal for small domestic installations.
- Gitral is perceived as more long-term reliable and better suited for demanding installations, particularly for collective buildings or sensitive DHW installations.
Several professionals also note that improper installation of a Gitral tank (connection or inflation pressure error) can cause premature leaks, without this being a defect of the product itself.
Summary of Craftsmen's Opinions
In summary, French artisans consider Gitral to be more robust and durable, while Watts remains the preferred choice for its simplicity, attractive price, and easy maintenance.