Graf Carat tank 2700 litre Complete rainwater harvesting System 4 for domestic use with Rain Director rainwater management.

Use rainwater to flush toilets, fill washing machines and water the garden. Graf Carat Tank 2700 litres rainwater harvesting system for garden and domestic use with Rain Director. Collect rainwater, store it and use it safely in the home.

This system is supplied with a RWH-RHD01 Rain Director® - the intelligent way to use rainwater in the home. The main benefits of this system are reduced electricity consumption, lower mains water usage, cleaner tank waterandcontrolled water pressure at the appliances.

The kit comprises:

• Graf Carat Tank 2700 litre underground tank
• Pump, Filter and connections
• Header Tank for roof space
• Rain Director® rainwater management system to deliver rainwater where you need it.

The revolutionary Rain Director® is an intelligent domestic rainwater storage and distribution system. There are two components - a Smart loft header tank and a12v Valve Control Panel to direct the water flow.

The Smart Header Tank is controlled by electronic level sensors, valves and control panel. The advantages over normal rainwater pumping systems are:

• Variable rainwater level in the smart header tank (all water is used before it’s refilled) eliminates pump cycling and reduces power consumption.
• The header tank only refills once it’s completely empty (while normal rainwater systems make the pump start every time any amount of water is used) so wear on the pump and electricity usage are both reduced.
• The tank provides a constant flow of rainwater under gravity at any time, including during power cuts and of course is built with fail-safe controls.

The Rain Director 12v Valve Control Panel controls the water delivery - whether rainwater or mains water. The Rain Director®’s Control Panel provides a simple set of buttons to set the operation. For example, the Rain Director’s auto-flush function detects when the occupant is away from home (for example, for holidays) and empties header tank to avoid rainwater there becoming discoloured (dark coloured water and stained toilet bowl, to be avoided). For more information on all functions, fitting and benefits, please download this Rain Director® User Manual.

In summary the combination of controlling the water flow to and froma header tank and the ability to flush through the header tank with mains water using the 12v Valve Control Panel brings a number of unique benefits:-

• Saves energy and prolongs pump life
• Avoids water discolouration in header tank
• Assures water supply during a power cut
• Low voltage controls and no internal pump noise

The Rain Director®solves many of the problems faced by consumers wishing to use rainwater around the home. Here are some examples:

Problem 1: Typical rainwater systems have a pressure sensitive pump in or near the rainwater tank which maintains pressure on the pipe run to toilets, washing machines and any non-drinking-water tap. As pressure in the pipe run drops, the pump will start up again even when there has been no demand on the water supply. This creates a situation where the pump will cycle all day, i.e. turn itself on and off periodically, day and night. The moment of the pump starting draws a peak surge in power, which is repeated many times an hour. This effort also accelerates the wear on the pump bearings, seals and motor.

The Rain Director® solution: The low level sensor will start the pump only when all the water in the header tank has been used. No cycling. A 114 litre header tank will last for more than 10 full toilet flushes, or two clothes washing machine cycles. In a typical home the pump would only cycle about once a day. Less electricity used. Much less wear on the pump.

Problem 2: Rainwater in a header tank inside the house gets discoloured after time (rainwater stored under ground is maintained at a temperature hardly ever above 5 degrees C, so it does not get brackish).

Rain Director^® solution: Rain Director’s® auto-empty function detects when the occupant is away from home (for example, on holiday) and empties the header tank every three days. Unused water is returned to the underground rain water storage tank. When occupant returns home and starts using water, the system reverts to rain mode automatically.

The Rain Director® is built in the UK by ADL Products to the highest standards for, and under the control of, the leading provider of consumer rainwater harvesting products RainWater Harvesting Ltd.All components have been designed to comply with WRAS (Water Regulations Advisory Scheme) and UK Building Regulations. WRAS approval process has been commenced and expected shortly.

In this kit version, collated for you by RainWaterHarvesting.co.uk, you get the tank, the Rain Director® , the Optimax filter pack and the accessories listed below.

External HDPE Rainwater Pipe included. It is important to identify a source of a water supply. Untreated rainwater is not for human consumption and so water companies are recommending (and in some cases requiring) that Black and Green HDPE pipe is used for piping rainwater from the tank to the point of use - eg. garden tap. The point of use should be clearly labelled to show that rain water is the source. We include 25mm black and green hdpe pipe and labels with this kit with the option to buy further rolls of pipe.

Complete System Components:

Components list for Graf Carat tank 2700 litre DUK4
Product Code	Product Description
GF-372001	Graf Carat tank, underground 2700 litre
GF-371001	Carat dome (turret)
GF-371010	Carat lid, telescopic, made of PE (green)
GF-330192	Calmed inlet (into base of tank)
27-20-25	1" Strainer
GF-330108	Overflow siphon (high water level outlet, fits filter)
GF-371033	Carat 2700 accessory pack including tank sealing kit
GF-375021	Carat tank dome sealing kit
GF-340037	Graf Optimax Pro Filter
RWH-HYD01	Series 3 Submersible pump and inline filter from Hydroforce Pumps Ltd
RWH-RD01	Rain Director 01
RWH-HDPE25/25	Rainwater pipe HDPE 25mm diameter 25 metre coil
Delivery	Haulage, UK mainland included (Highlands & Islands on request)
GF-372001-DUK4	Complete Underground kit for domestic use with Rain Director

Not for you? - Why not take a look at our 'Standard System' For more information please click here

Options  (please phone 01733 405100 for availability and price)

• Self-cleaning hose connection kit
• Vehicle load-bearing dome
• Turret (dome) extension for burying the tank deeper

The product code has the suffix D for "domestic" (so you can use the system to provide water for flushing toilets and washing clothes) but we can recommend the same set-up for garden use, washing the car etc.

Manufacturing expertise
The Graf Carat tank is the largest tank of its kind in the world to be manufactured by injection compression moulding. This technique provides the tank with unbeatable stability and ensures that each component is produced with the highest accuracy. Graf have invested €20m in their factory near Freiburg for the Carat range, introduced in early 2007.

Shipping, assembly and installation
Like the Graf Hercules, the Carat comes in two halves so you can carry it through a doorway as narrow as 80cms (and so we can stack many of them on one pallet for bulk transport). A centering bolt makes assembly accurate and the quick connections ensure there are no leaks between the two sections... and yet you can disassemble it if you like. The material used is a PE variant called Duralen. The Carat tank can support pedestrian and car traffic (but not trucks and HGVs) when fitted with the optional dome and cast iron lid. The complete installation and maintenance instructions for the Carat tanks are available on demand from info@rainwaterharvesting.co.uk but are not available except to purchasers.

• Designed for underground mounting
• Patented quick connection (no screws required for mounting)
• Permanently watertight: durably sealed thanks to solid profile sealing
• Easy transport thanks to low weight and practicable size
• Durably sealed thanks to solid profile sealing
• See table for dimensions and weight
• Connections for underground installation: we supply the tank as in the Graf Eco Plus package, with recesses where holes for piping need to be cut.

Compare the Carat S Tank sizes
Tank	2700 Litres	3750 Litres	4800 Litres	6500 Litres
Product Code	370001	370002	370003	370004
Weight	120 kg	150 kg	185 kg	220 kg
Length	2080mm	2280mm	2280mm	2390mm
Width	1565mm	1755mm	1985mm	2190mm
Height	1400mm	1590mm	1820mm	2100mm
Total Height	2010mm	2200mm	2430mm	2710mm
Half Height ie before assembly (for access)	700mm	790mm	910mm	1050mm
Go to other tank sizes	You are here	Go to a 3750L system	Go to a 4800L system	Go to a 6500L system

Download a technical drawing of the Carat 2700 litre tank by clicking here

More technical information about the Rain Director® click here

A detailed catalogue on the Carat tank range can be downloaded by clicking here.

Download a Carat tank installation guide by clicking here

Otto Graf in Germany have a wealth of technical data and application illustrations on their website, including downloads and videos. To visit the Graf website please click here