• Graf Carat Silentio 4,800 Litre Tank
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Graf Carat Silentio 4,800 Litre Tank

£3,900.00 (£3,250.00 ex VAT)
£3,900.00 (£3,250.00 ex VAT)
Est. delivery 5-7 working days
Loading Lid

The Silentio 4,800 Litre Rainwater Harvesting Tank by Graf provides a sustainable and efficient way to collect, store, and reuse rainwater for both indoor and outdoor applications. Made from 100% recycled plastic, this eco-friendly system helps you reduce water bills while contributing to environmental sustainability.

Ideal for installations up to 15 metres away from the domestic water control unit, the Silentio system efficiently supplies rainwater to WCs, washing machines, and external taps — perfect for garden irrigation, pressure washing, and general outdoor cleaning.

Benefits:

  • Manufactured from 100% recycled, sustainable materials
  • Shallow dig design — requires minimal excavation depth
  • Easy backfill with granular material (no concrete needed)
  • Award-winning internal filtration technology
  • Free delivery and commissioning included
  • Control panel with real-time water level display
  • Automatic low-level switch-over and timed filter cleaning
  • Ultra-quiet, reliable system operation
  • Versatile for indoor and outdoor water applications

Available with either a pedestrian or vehicle-loading lid to suit your installation requirements.

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 4,800 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

RWH4800-G/CSP

Technical Specification

Capacity (litres): 4,800 ltr

Weight (kg): 185kg

Height (mm): 2430mm

Width (mm): 1985mm

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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