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Above Ground Water Tanks

Our above ground water tanks are designed for safe, durable water storage across domestic, agricultural and commercial applications. Ideal for properties where underground installation isn’t required, these tanks provide a practical and cost-effective solution for bulk water storage.

We supply both potable (drinking water safe) and non-potable water tanks in a wide range of capacities, from smaller domestic systems through to large agricultural and industrial storage tanks. Manufactured from high-quality, UV stabilised polyethylene, our plastic above ground tanks are corrosion-resistant, low maintenance and built for long service life. Read More

Common uses include rainwater harvesting, farm and livestock supply, irrigation systems, construction sites and general water reserve storage.

Need help choosing the right size or outlet configuration? Our team can advise on capacity, fittings and delivery options across the UK.

Black 150 Litre Enduramaxx rainwater harvesting tank, front view

Potable & Drinking Water Tanks

Enduramaxx 150 Litre Vertical Potable Water Tank

Price From: £116.44 Exc VAT

(£139.73 Inc VAT)

4 - 6 Working Days

Enduramaxx 240 litre rainwater harvesting tank made from UV-stabilised MDPE

Above Ground Water Tanks

240 Litre Drinking Water Tank – Enduramaxx

Price From: £125.06 Exc VAT

(£150.07 Inc VAT)

4 – 6 Working Days

300 Litre Potable Water Tank

Potable & Drinking Water Tanks

Enduramaxx 300 Litre Vertical Potable Water Tank

Price From: £125.06 Exc VAT

(£150.07 Inc VAT)

4 - 6 Working Days

305 Litre Round Water Tank

251-500 Litres

305 Litre Round Water Tank

Price From: £126.03 Exc VAT

(£151.24 Inc VAT)

4 – 6 Working Days

300 Litre Potable Water Tank

Non-Potable Water Tanks

Enduramaxx 300 Litre Vertical Non-Potable Water Tank

Price From: £129.38 Exc VAT

(£155.26 Inc VAT)

4 - 6 Working Days

350 Litre Flat Baffled Water Tank

Baffled Water Tanks

Wydale 350 Litre Flat Baffled Water Tank

Price From: £157.90 Exc VAT

(£189.48 Inc VAT)

5 – 7 Working Days

350 Litre Upright Baffled Water Tank

Baffled Water Tanks

Wydale 350 Litre Upright Baffled Water Tank

Price From: £157.90 Exc VAT

(£189.48 Inc VAT)

5 – 7 Working Days

Potable Water Tank

Non-Potable Water Tanks

Enduramaxx 500 Litre Vertical Non-Potable Water Tank

Price From: £159.56 Exc VAT

(£191.47 Inc VAT)

4 - 6 Working Days

325 Litre Flat Water Tank

Baffled Water Tanks

Wydale 325 Litre Upright Baffled Water Tank

Price From: £161.64 Exc VAT

(£193.97 Inc VAT)

2 - 5 Working Days

T425NA12GH - 425 Litre Round Water Tank

251-500 Litres

425 Litre Round Water Tank

Price From: £165.77 Exc VAT

(£198.92 Inc VAT)

2 - 5 Working Days

500 Litre Slimline Potable Water Tank

Potable & Drinking Water Tanks

500 Litre Slimline Potable Water Tank

Price From: £172.50 Exc VAT

(£207.00 Inc VAT)

5 – 7 Working Days

Wydale 350 Litre Upright Baffled Water Tank - Translucent Orange

Baffled Water Tanks

Wydale 350 Litre Upright Baffled Water Tank – Translucent Orange

Price From: £173.67 Exc VAT

(£208.40 Inc VAT)

7 - 14 Working Days

Potable Water Tank

Enduramaxx

Enduramaxx 500 Litre Vertical Potable Water Tank

Price From: £181.12 Exc VAT

(£217.34 Inc VAT)

4 - 6 Working Days

400 Litre Water Tank - Online Tank Store

Baffled Water Tanks

Wydale 400 Litre Upright Baffled Water Tank

Price From: £185.24 Exc VAT

(£222.29 Inc VAT)

2 - 5 Working Days

400 Litre Horizontal Baffled Tank - Enduramaxx

Baffled Water Tanks

Enduramaxx 400 Litre Horizontal Baffled Tank

Price From: £189.75 Exc VAT

(£227.70 Inc VAT)

4 – 6 Working Days

400 Litre Flat Baffled Water Tank - Online Tank Store

Baffled Water Tanks

Wydale 400 Litre Flat Baffled Water Tank

Price From: £203.05 Exc VAT

(£243.66 Inc VAT)

2 - 5 Working Days

Wydale 450 Litre Flat Baffled Water Tank

Transportable Water Tanks

Wydale 450 Litre Flat Baffled Water Tank

Price From: £206.40 Exc VAT

(£247.68 Inc VAT)

2 - 5 Working Days

720 Litre Slimline Potable Water Tank

Non-Potable Water Tanks

Enduramaxx 720 Litre Slimline Non-Potable Water Tank

Price From: £207.00 Exc VAT

(£248.40 Inc VAT)

4 - 6 Working Days

Wydale 500 Litre Flat Baffled Water Tank

Transportable Water Tanks

Wydale 500 Litre Flat Baffled Water Tank

Price From: £215.17 Exc VAT

(£258.20 Inc VAT)

2 – 5 Working Days

500 Litre Upright Baffled Water Tank

Above Ground Water Tanks

Wydale 500 Litre Upright Baffled Water Tank

Price From: £215.17 Exc VAT

(£258.20 Inc VAT)

2 – 5 Working Days

Wydale 450 Litre Tower Baffled Water Tank

Transportable Water Tanks

Wydale 450 Litre Tower Baffled Water Tank

Price From: £218.14 Exc VAT

(£261.77 Inc VAT)

2 - 5 Working Days

460 Litre Flat Baffled Water Tank

Transportable Water Tanks

Wydale 460 Litre Flat Baffled Water Tank

Price From: £223.04 Exc VAT

(£267.65 Inc VAT)

2 - 5 Working Days

460 Litre Upright Baffled Water Tank

Above Ground Water Tanks

Wydale 460 Litre Upright Baffled Water Tank

Price From: £223.04 Exc VAT

(£267.65 Inc VAT)

2 - 5 Working Days

500 Litre Horizontal Baffled Tank - Enduramaxx

Baffled Water Tanks

Enduramaxx 500 Litre Horizontal Baffled Tank

Price From: £224.25 Exc VAT

(£269.10 Inc VAT)

4 – 6 Working Days

500 Litre Upright Baffled Tank - Enduramaxx

Baffled Water Tanks

Enduramaxx 500 Litre Upright Baffled Tank

Price From: £224.25 Exc VAT

(£269.10 Inc VAT)

7 – 10 Working Days

500 Litre Flat Baffled Tank - Enduramaxx

Baffled Water Tanks

Enduramaxx 500 Litre Flat Baffled Tank

Price From: £224.25 Exc VAT

(£269.10 Inc VAT)

4 – 6 Working Days

720 Litre Slimline Potable Water Tank

Potable & Drinking Water Tanks

Enduramaxx 720 Litre Slimline Potable Water Tank

Price From: £228.56 Exc VAT

(£274.27 Inc VAT)

4 - 6 Working Days

1050 Litre Potable Water Tank

Potable & Drinking Water Tanks

Endurmaxx 1050 Litre Slimline Potable Water Tank

Price From: £228.56 Exc VAT

(£274.27 Inc VAT)

4 - 6 Working Days

1250 Litre Potable Water Tank - Enduramaxx

Potable & Drinking Water Tanks

Enduramaxx 1250 Litre Vertical Potable Water Tank

Price From: £245.81 Exc VAT

(£294.97 Inc VAT)

4 - 6 Working Days

1025 Litre Round Water Tank

1000+ Litres

1025 Litre Round Water Tank

Price From: £261.10 Exc VAT

(£313.32 Inc VAT)

2 - 5 Working Days

825 Litre Potable Water Tank

Potable & Drinking Water Tanks

Enduramaxx 825 Litre Vertical Potable Water Tank

Price From: £263.06 Exc VAT

(£315.67 Inc VAT)

4 - 6 Working Days

1000 Litre Potable Water Tank

Potable & Drinking Water Tanks

Enduramaxx 1000 Litre Low Profile Potable Water Tank

Price From: £263.06 Exc VAT

(£315.67 Inc VAT)

4 - 6 Working Days

1500 Litre Potable Water Tank

Potable & Drinking Water Tanks

Enduramaxx 1500 Litre Vertical Potable Water Tank

Price From: £280.31 Exc VAT

(£336.37 Inc VAT)

4 - 6 Working Days

900L Round Tank

Non-Potable Water Tanks

Etills 900 Litre Round Non-Potable Water Tank

Price From: £295.68 Exc VAT

3 - 5 Working Days

2500 Litre Round Rainwater Harvesting Tank

Non-Potable Water Tanks

Enduramaxx 2500 Litre Vertical Non-Potable Water Tank

Price From: £301.88 Exc VAT

(£362.26 Inc VAT)

4 - 6 Working Days

1300 Round Tank

Non-Potable Water Tanks

Etills 1300 Litre Round Non-Potable Water Tank

Price From: £306.43 Exc VAT

3 - 5 Working Days

800 Litre Horizontal Baffled Tank - Enduramaxx

Baffled Water Tanks

Enduramaxx 800 Litre Horizontal Baffled Tank

Price From: £310.50 Exc VAT

(£372.60 Inc VAT)

4 – 6 Working Days

800 Litre Flat Baffled Tank - Enduramaxx

Baffled Water Tanks

Enduramaxx 800 Litre Flat Baffled Tank

Price From: £310.50 Exc VAT

(£372.60 Inc VAT)

4 – 6 Working Days

800 Litre Upright Baffled Tank - Enduramaxx

Baffled Water Tanks

Enduramaxx 800 Litre Upright Baffled Tank

Price From: £310.50 Exc VAT

(£372.60 Inc VAT)

4 – 6 Working Days

Enduramaxx 2,000 Litre Water Tank - Potable

Potable & Drinking Water Tanks

Enduramaxx 2000 Litre Vertical Potable Water Tank

Price From: £314.81 Exc VAT

(£377.77 Inc VAT)

4 – 6 Working Days

1000 Litre Slimline Potable Water Tank

Potable & Drinking Water Tanks

Enduramaxx 1000 Litre Slimline Potable Water Tank

Price From: £314.81 Exc VAT

(£377.77 Inc VAT)

5 – 7 Working Days

Potable & Drinking Water Tanks

Enduramaxx 1500 Litre Low Profile Potable Water Tank

Price From: £316.54 Exc VAT

(£379.85 Inc VAT)

4 - 6 Working Days

2500 Litre Round Rainwater Harvesting Tank

Potable & Drinking Water Tanks

Enduramaxx 2500 Litre Vertical Potable Water Tank

Price From: £323.44 Exc VAT

(£388.13 Inc VAT)

4 - 6 Working Days

1000 Litre Slimline Rainwater Harvesting Tank

Above Ground Rainwater Harvesting Tanks

Enduramaxx 1000 Litre Slimline Rainwater Harvesting Tank

Price From: £332.06 Exc VAT

(£398.47 Inc VAT)

5 – 7 Working Days

1450 Round Tank

Non-Potable Water Tanks

Etills 1450 Litre Round Non-Potable Water Tank

Price From: £349.44 Exc VAT

3 - 5 Working Days

1600 Round Tank

Non-Potable Water Tanks

Etills 1600 Litre Round Non-Potable Water Tank

Price From: £349.44 Exc VAT

3 - 5 Working Days

1400 Litre Vertical Water Storage Tank - Tuffa Tanks

Above Ground Rainwater Harvesting Tanks

1400 Litre Rainwater Harvesting Tank – Tuffa Tanks

Price From: £358.00 Exc VAT

(£429.60 Inc VAT)

7 - 14 Working Days

1000 Litre Horizontal Baffled Tank - Enduramaxx

Above Ground Water Tanks

Enduramaxx 1000 Litre Horizontal Baffled Tank

Price From: £362.25 Exc VAT

(£434.70 Inc VAT)

4 – 6 Working Days

Enduramaxx 1000 Litre Upright Baffled Tank

Baffled Water Tanks

Enduramaxx 1000 Litre Upright Baffled Tank

Price From: £362.25 Exc VAT

(£434.70 Inc VAT)

4 – 6 Working Days

2000L Tall Black Tank

Non-Potable Water Tanks

Etills 2000 Litre Tall Round Non-Potable Water Tank

Price From: £392.45 Exc VAT

3 - 5 Working Days

2000L Water Tank

Non-Potable Water Tanks

Etills 2000 Litre Round Non-Potable Water Tank

Price From: £392.45 Exc VAT

3 - 5 Working Days

Paxton - 909 Litre Above Ground Water Storage Tank

Above Ground Water Tanks

Paxton – 909 Litre Above Ground Water Storage Tank

Price From: £404.20 Exc VAT

(£485.04 Inc VAT)

2 - 3 Working Weeks

3000 Litre Non-Potable Water Tank

Non-Potable Water Tanks

Enduramaxx 3000 Litre Vertical Non-Potable Water Tank

Price From: £431.25 Exc VAT

(£517.50 Inc VAT)

4 - 6 Working Days

3000 Litre Non-Potable Water Tank

Potable & Drinking Water Tanks

Enduramaxx 3000 Litre Slimline Potable Water Tank

Price From: £452.81 Exc VAT

(£543.37 Inc VAT)

4 - 6 Working Days

1250 Litre Flat Tank

Transportable Water Tanks

Wydale 1250 Litre Flat Water Tank

Price From: £462.59 Exc VAT

(£555.11 Inc VAT)

2 - 5 Working Days

1250 Litre Upright Baffled Water Tank - Plastic

Transportable Water Tanks

Wydale 1250 Litre Upright Baffled Water Tank

Price From: £462.59 Exc VAT

(£555.11 Inc VAT)

2 – 5 Working Days

Potable & Drinking Water Tanks

Enduramaxx 3000 Litre Low Profile Potable Water Tank

Price From: £474.37 Exc VAT

(£569.24 Inc VAT)

4 - 6 Working Days

1400 Litre Vertical Water Tank - Potable

Above Ground Water Tanks

1400 Litre Vertical Water Tank – Non-Potable

Price From: £510.00 Exc VAT

7 – 14 Working Days

1350 Litre Water Tank - Tuffa Tanks

Water Tanks

1350 Litre Water Tank – Tuffa Tanks

Price From: £515.00 Exc VAT

7 - 14 Working Days

3500 Litre Potable Water Tank

Non-Potable Water Tanks

Enduramaxx 3500 Litre Low Profile Non-Potable Water Tank

Price From: £534.75 Exc VAT

(£641.70 Inc VAT)

4 - 6 Working Days

3500 Litre Potable Water Tank

Potable & Drinking Water Tanks

Enduramaxx 3500 Litre Low Profile Potable Water Tank

Price From: £556.31 Exc VAT

(£667.57 Inc VAT)

4 - 6 Working Days

1400 Litre Vertical Water Tank - Potable

Above Ground Water Tanks

1400 Litre Vertical Water Tank – Potable

Price From: £565.00 Exc VAT

7 – 14 Working Days

920 Litre Slimline Water Tank - Potable

Above Ground Water Tanks

920 Litre Slimline Water Tank Non-Potable

Price From: £587.00 Exc VAT

7 – 14 Working Days

Above Ground Water Tanks

1200 Litre Low Profile Water Tank – Non Potable

Price From: £587.00 Exc VAT

7 – 14 Working Days

920 Litre Slimline Water Tank - Potable

Above Ground Water Tanks

920 Litre Slimline Water Tank – Potable

Price From: £590.00 Exc VAT

7 – 14 Working Days

Above Ground Water Tanks

1200 Litre Low Profile Water Tank – Potable

Price From: £599.00 Exc VAT

7 – 14 Working Days

Paxton - 2728 Litre Above Ground Water Storage Tank

Above Ground Water Tanks

Paxton – 2728 Litre Above Ground Water Storage Tank

Price From: £605.97 Exc VAT

(£727.16 Inc VAT)

2 - 3 Working Weeks

1100 Litre Slimline Water Tank - Potable

Above Ground Water Tanks

1100 Litre Slimline Water Tank – Potable

Price From: £620.50 Exc VAT

7 – 14 Working Days

2700 Litre Vertical Water Tank - Potable

1000+ Litres

2700 Litre Vertical Water Tank – Non-Potable

Price From: £629.00 Exc VAT

7 – 14 Working Days

4000 Litre Potable Water Tank

Non-Potable Water Tanks

Enduramaxx 4000 Litre Low Profile Non-Potable Water Tank

Price From: £646.88 Exc VAT

(£776.26 Inc VAT)

4 - 6 Working Days

5000 Litre Open Top Water Tank

Open Top Water Tanks

5000 Litre Open Top Water Tank

Price From: £664.12 Exc VAT

(£796.94 Inc VAT)

14 - 21 Working Days

1100 Litre Slimline Water Tank Non-Potable

Above Ground Water Tanks

1100 Litre Slimline Water Tank Non-Potable

Price From: £665.00 Exc VAT

7 – 14 Working Days

4000 Litre Potable Water Tank

Potable & Drinking Water Tanks

Enduramaxx 4000 Litre Potable Low Profile Water Tank

Price From: £668.44 Exc VAT

(£802.13 Inc VAT)

4 - 6 Working Days

Insulated Water Tanks Category

Above Ground Water Tanks

Enduramaxx 4000 Litre Vertical Potable Water Tank

Price From: £668.44 Exc VAT

(£802.13 Inc VAT)

4 - 6 Working Days

4500 Litre Potable Water Tank

Potable & Drinking Water Tanks

Enduramaxx 4500 Litre Vertical Potable Water Tank

Price From: £694.31 Exc VAT

(£833.17 Inc VAT)

4 - 6 Working Days

5000 Litre Potable Water Tank - Enduramaxx

Above Ground Rainwater Harvesting Tanks

Enduramaxx 5000 Litre Vertical Rainwater Harvesting Tank

Price From: £715.88 Exc VAT

(£859.06 Inc VAT)

4 - 6 Working Days

5000 Litre Potable Water Tank - Enduramaxx

Non-Potable Water Tanks

Enduramaxx 5000 Litre Vertical Non-Potable Water Tank

Price From: £715.88 Exc VAT

(£859.06 Inc VAT)

5 - 7 Working Days

6000 Litre Rainwater Harvesting Tank

Non-Potable Water Tanks

Enduramaxx 6000 Litre Vertical Non-Potable Water Tank

Price From: £733.12 Exc VAT

(£879.74 Inc VAT)

4 - 6 Working Days

5000 Litre Potable Water Tank - Enduramaxx

Potable & Drinking Water Tanks

Enduramaxx 5000 Litre Vertical Potable Water Tank

Price From: £737.44 Exc VAT

(£884.93 Inc VAT)

4 - 6 Working Days

2700 Litre Vertical Water Tank - Potable

1000+ Litres

2700 Litre Vertical Water Tank – Potable

Price From: £750.00 Exc VAT

7 – 14 Working Days

6000 Litre Rainwater Harvesting Tank - Tuffa Tanks

Above Ground Water Tanks

6000 Litre Water Storage Tank – Tuffa Tanks

Price From: £750.00 Exc VAT

(£900.00 Inc VAT)

7 - 14 Working Days

6000 Litre Potable Water Tank

Potable & Drinking Water Tanks

Enduramaxx 6000 Litre Vertical Potable Water Tank

Price From: £754.69 Exc VAT

(£905.63 Inc VAT)

4 - 6 Working Days

3800 Litre Vertical Water Tank - Potable

1000+ Litres

3800 Litre Vertical Water Tank – Potable

Price From: £780.00 Exc VAT

7 – 14 Working Days

3500 Litre Water Storage Tank

Above Ground Water Tanks

3500 Litre Water Storage Tank – Tuffa Tanks

Price From: £825.00 Exc VAT

(£990.00 Inc VAT)

7 - 14 Working Days

7,000 Litre Potable Water Tank - Enduramaxx

Above Ground Water Tanks

Enduramaxx 7,000 Litre Low Profile Non-Potable Water Tank

Price From: £905.62 Exc VAT

(£1086.74 Inc VAT)

4 - 6 Working Days

Non-Potable Water Tanks

Enduramaxx 5000 Litre Low Profile Non-Potable Water Tank

Price From: £905.63 Exc VAT

(£1086.76 Inc VAT)

5 - 7 Working Days

Rainwater Harvesting

Enduramaxx 5000 Litre Low Profile Rainwater Harvesting Tank

Price From: £905.63 Exc VAT

(£1086.76 Inc VAT)

5 - 7 Working Days

7,000 Litre Potable Water Tank - Enduramaxx

Potable & Drinking Water Tanks

Enduramaxx 7,000 Litre Low Profile Potable Water Tank

Price From: £927.19 Exc VAT

(£1112.63 Inc VAT)

4 – 6 Working Days

Paxton - 4546 Litre Above Ground Water Storage Tank

Above Ground Water Tanks

Paxton – 4546 Litre Above Ground Water Storage Tank

Price From: £971.46 Exc VAT

(£1165.75 Inc VAT)

2 - 3 Working Weeks

7500 Litre Rainwater Harvesting Tank

Non-Potable Water Tanks

Enduramaxx 7500 Litre Low Profile Non-Potable Water Tank

Price From: £991.88 Exc VAT

(£1190.26 Inc VAT)

4 - 6 Working Days

7,500 Litre Potable Water Tank - Enduramaxx

Potable & Drinking Water Tanks

Enduramaxx 7,500 Litre Low Profile Potable Water Tank

Price From: £1,013.44 Exc VAT

(£1216.13 Inc VAT)

4 - 6 Working Days

5700 Litre Vertical Water Tank – Potable

1000+ Litres

Harlequin 5700 Litre Vertical Potable Water Tank

Price From: £1,040.00 Exc VAT

7 – 14 Working Days

Enduramaxx 10,000 Litre Drinking Water Tank

Potable & Drinking Water Tanks

Enduramaxx 10,000 Litre Vertical Potable Water Tank

Price From: £1,056.56 Exc VAT

(£1267.87 Inc VAT)

4 – 6 Working Days

10,000 Litre Rainwater Harvesting Tank - Tuffa Tanks

Above Ground Rainwater Harvesting Tanks

10,000 Litre Rainwater Harvesting Tank – Tuffa Tanks

Price From: £1,142.50 Exc VAT

(£1371.00 Inc VAT)

7 - 14 Working Days

10,000 Litre Rainwater Harvesting Tank - Tuffa Tanks

Above Ground Rainwater Harvesting Tanks

10,000 Litre Above Ground Rainwater Harvesting Tank – Tuffa

Price From: £1,142.50 Exc VAT

(£1371.00 Inc VAT)

7 - 14 Working Days

Potable & Drinking Water Tanks

Enduramaxx 10,000 Litre Low Profile Potable Water Tank

Price From: £1,144.54 Exc VAT

(£1373.45 Inc VAT)

4 - 6 Working Days

7500 Litre Vertical Water Tank – Potable

Above Ground Water Tanks

7500 Litre Vertical Water Tank – Potable

Price From: £1,195.00 Exc VAT

7 – 14 Working Days

12,500 Litre Black (Non Potable)

Non-Potable Water Tanks

Enduramaxx 12,500 Litre Vertical Water Tank Non-Potable

Price From: £1,423.12 Exc VAT

(£1707.74 Inc VAT)

4 – 6 Working Days

12,500 Litre Black (Non Potable)

Non-Potable Water Tanks

Enduramaxx 12,000 Litre Vertical Non-Potable Water Tank

Price From: £1,423.12 Exc VAT

(£1707.74 Inc VAT)

4 – 6 Working Days

12,000 Litre Potable Water Tank - Enduramaxx

Potable & Drinking Water Tanks

Enduramaxx 12,000 Litre Vertical Potable Water Tank

Price From: £1,444.69 Exc VAT

(£1733.63 Inc VAT)

4 - 6 Working Days

What is an above ground water tank used for?

Above ground water tanks are used for storing potable or non-potable water in domestic, agricultural and commercial settings. Common uses include rainwater harvesting, irrigation systems, livestock supply, construction sites and emergency water storage.

Are above ground water tanks suitable for drinking water?

Yes, provided you choose a potable (drinking water safe) tank. Potable tanks are manufactured from WRAS-approved or food-grade materials and are designed specifically for storing clean drinking water.

What size above ground water tank do I need?

The correct size depends on your application. Domestic properties typically require 900–2000 litres, while agricultural and commercial users often require 3000 litres or more. Larger capacity tanks are available for bulk storage.

Do above ground water tanks need a base?

Yes. Tanks must be installed on a level, solid and load-bearing base such as concrete or compacted hardcore. A stable base ensures safe operation and prevents distortion or stress damage.

How long do plastic above ground water tanks last?

High-quality polyethylene tanks are UV stabilised and corrosion-resistant. With proper installation and maintenance, they can last 15–25 years or more.

Can above ground tanks be used for rainwater harvesting?

Can above ground tanks be used for rainwater harvesting?