• Graf Carat Silentio 3,750 Litre Tank
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Graf Carat Silentio 3,750 Litre Tank

£3,684.00 (£3,070.00 ex VAT)
£3,684.00 (£3,070.00 ex VAT)
Est. delivery 5-7 working days
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Discover the NEW Silentio Rainwater Harvesting Tank Range by Graf — a complete, sustainable solution designed to save both water and money. Made from 100% recycled plastic, this eco-friendly system reduces your environmental footprint while helping to lower your water bills over time.

The Silentio range is ideal for installations where the tank and domestic water control unit are positioned up to 15 metres apart. It efficiently supplies rainwater to WCs, washing machines, and external taps, making it perfect for garden irrigation, car washing, and other outdoor uses.

Benefits:

  • Manufactured from sustainable, 100% recycled plastic
  • Shallow dig design — requires minimal excavation
  • Easy granular backfill (no need for concrete)
  • Award-winning internal filter technology
  • Free UK delivery and free commissioning included
  • Control panel clearly displays water levels
  • Automatic low-level switching and timed filter cleaning
  • Ultra-quiet system operation
  • Suitable for a wide range of domestic and garden applications

Available with either a pedestrian or vehicle-loading lid for flexible installation options.

View Datasheet Here

View Installation Guide Here

CALL FOR EXPERT ADVICE: 0121 351 3230

Full Description

The new Silentio range by Graf offers exceptional water quality for non-potable water uses inside and outside of the home.

This tank will save you money in many ways. Firstly, by reusing rainwater as a natural resource, you will save money in the long run on your water bills, as well as practising sustainability. Also, during installation, this tank only requires a granular backfill, as opposed to concrete. This will save you up to £60 per cubic metre. It also makes installation much easier. See the installation guide above for more details.

This 3,750 litre Carat Silentio tank is made from 100% recycled plastic. So, not only are you helping the planet by reusing rainwater, the tank itself is made from reusable materials.

The rainwater filters use efficient self-cleaning technology, which has won awards. You can trust this tank to produce pure, clean water in every use.

Additional benefits:
- The Silentio tank is the only rainwater harvester of its kind to use a domestic external pump unit with an AA air gap in the UK
- Complete package provided
- Telescopic lid
- Fast lead time
- Automatic pumps
- Consistent water supply
- Easy installation

What's included:
1. Underground tank (choice of tanks available, sizes vary according to property type)
2. Telescopic lid (choice of telescopic lid available, depending on tank location)
3. Filter (Minimax filter supplied in accordance with the type of tank)
4. Floating water intake
5. AA Silentio unit
6. Float sensor (connected from Silentio unit to the underground tank)
7. Reversible flow filter

Manufacturer SKU

RWH3750-G/CSP

Technical Specification

Capacity (litres): 3,750 ltr

Weight (kg): 150kg

Height (mm): 2200mm

Width (mm): 1755mm

Length (mm): 2280mm

Contact Us

Our team of experts are available and ready to speak to you. You can contact us or call us directly on 0121 351 3230. Available Mon-Friday 8am-5pm.

Related Categories

-Below Ground Rainwater Harvesting Tanks -Best Sellers -Rainwater Harvesting

Further Questions?

Our team of specialists are here to help. We install many of our products so can provide real-world advice. We also offer a free take-off service if required.

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