How to determine whether you need a fiberglass water tank, a stainless steel water tank or a buried water tank?

FRP water tank
Features:
Material: Glass fiber reinforced plastic, lightweight and highly corrosion-resistant.
Advantages: Low price, easy installation (can be assembled on-site), does not rust, suitable for weak acid/weak alkali environments.
Disadvantage: It is prone to aging under long-term exposure to sunlight, and harmful substances may precipitate at high temperatures (food-grade resin lining is required).
Applicable scenarios:
✔ Budget is limited, but large capacity water storage is required (such as fire water tanks, agricultural irrigation).
✔ Not exposed to long-term environments (such as indoors, underground machine rooms).
✔ General water quality requirements (for domestic water, it is necessary to confirm it meets food-grade standards).
Not applicable: High-temperature environments, frequent movement, and scenarios requiring high-intensity pressure-bearing.
2. Stainless steel water tank
Features:
Material: 304/316 stainless steel, with high strength and long service life (over 20 years).
Advantages: High hygiene level (suitable for drinking water), resistant to high temperatures, easy to clean, and capable of withstanding pressure.
Disadvantages: High cost. Point corrosion may occur in chloride ion environments (such as coastal areas).
Applicable scenarios:
✔ For high-standard water quality requirements such as direct drinking water, food processing, and hospitals.
✔ For secondary water supply in high-rise buildings (with strong pressure capacity).
✔ For vertical installation in limited spaces (such as rooftop water tanks).
Not applicable: Extremely low budget or highly corrosive environments (such as seawater, high-chloride water).
3. Underground Water Tank
Features:
Material: Mostly made of stainless steel (with anti-corrosion coating) or fiberglass reinforced plastic.
Advantages: Saves floor space, excellent insulation performance (prevents freezing in winter).
Disadvantages: Installation is complex (requiring digging and waterproofing) and maintenance is inconvenient.
Applicable scenarios:
✔ Insufficient floor space (such as underground water storage in residential areas or villas).
✔ Need to maintain stable water temperature (such as solar water heating system).
✔ Concealed projects (such as fire-fighting water tanks).
Not applicable: Areas with high groundwater levels and prone to flooding.
Quick decision flowchart
High water quality requirements (for drinking water/food) → Stainless steel water tank.
Low budget + Large capacity → Fiberglass water tank (confirmed not exposed to direct sunlight or high temperatures).
Save floor space → Underground water tank (ensuring the underground environment is dry).
High-pressure water supply/pressure-bearing demand → Stainless steel water tank.
Notes for Attention
Health certification: The drinking water tank must comply with national hygiene standards (such as GB 5749).
Maintenance cost: The repair cost for the buried water tank might be higher.
Climate impact: Underground water tanks in northern regions need to be protected against freezing and cracking.

We suggest that you consult us based on your actual needs. Provide us with on-site parameters (such as water quality reports, installation space dimensions) to obtain a precise solution.