Hook up to mains water

You will need to book a serviced pitch to be able to hook up directly to the water and waste.

You will need this sort of equipment to use your aquaroll 

https://www.amazon.co.uk/s/?ie=UTF8&keywords=aquaroll+mains+water+adaptor&tag=googhydr-21&index=automotive&hvadid=70518224656&hvpos=1t1&hvnetw=g&hvrand=1862266629584079302&hvpone=&hvptwo=&hvqmt=b&hvdev=t&hvdvcmdl=&hvlocint=1006562&hvlocphy=9046448&hvtargid=kwd-6276678515&ref=pd_sl_50fsk8xjn9_b

You get 8 mts of hose which should be sufficient for CC site but you might need longer for commercial sites so another 8 mts and a connector would be a good buy.

If you use Google to search on this topic there is a wealth of information out there.

If you have a truma system then this is the connection for water supply:

https://www.truma.com/uk/en/water-systems/ultraflow-waterline.php

You also need to look to waste water disposal. This article is useful and illustrates what is required:

https://caravanchronicles.com/2013/05/26/connecting-your-drainage-on-serviced-pitches/

We use both of the above to good effect. 

Direct connection systems such as the Truma Ultraflow Waterline carry a risk of damage to the van and van flooding if they fail to operate as designed; as can happen with debris getting in the shutoff valve within the regulator.

Failure to shut off the flow with the systems refilling an Aquaroll or other external container only lead to flooding of the pitch, not the van or over pressurising the van's water heater and water system.

It might be argued the risk of these systems ever going wrong is remote but no body can argue that the consequences of over pressurising the caravan are anything but serious.

ocsid's comment IMO is something to bear in mind 'It might be argued the risk of these systems ever going wrong is remote but no body can argue that the consequences of over pressurising the caravan are anything but serious.'

Not if you have a caravan that is made of materials that are not subject to water absorption. That have no requirement for a damp test due to those materials. Thankfully, despite the poor assembly of common poor quality parts we rest assured water leaking in the caravan hasn't caused any issues thus far, speaks the hubby of someone who left a tap running with a plug in the sink!!  Happily counter argued from a stand of experience not theory 

An alternative measure of reassurance if required is to close the tap to the Truma Waterline if not drawing water or off pitch.

My glass is half full, what's yours.

KeefySher's comment IMO is also something to bear in mind. 'An alternative measure of reassurance if required is to close the tap to the Truma Waterline if not drawing water or off pitch.' Maybe also turning off the tap before going to bed at night.

Not if you have a caravan that is made of materials that are not subject to water absorption. 

An alternative measure of reassurance if required is to close the tap to the Truma Waterline if not drawing water or off pitch.

 

I have not ever had one where flooding of the structure and carpeting, plus risking blowing up my £2000 Alde and other bits, can be so readily dismissed .

Turning off the supply rather defeats the purpose, over pressure damage still exists even whilst the van is occupied.

As a system designer, I seek to design out obvious serious consequences risks.

Not if you have a caravan that is made of materials that are not subject to water absorption. 

An alternative measure of reassurance if required is to close the tap to the Truma Waterline if not drawing water or off pitch.

 

I have not ever had one where flooding of the structure and carpeting, plus risking blowing up my £20000 Alde and other bits, can be so readily dismissed .

Turning off the supply rather defeats the purpose, over pressure damage still exists even whilst the van is occupied.

As a system designer, I seek to design out obvious serious consequences risks.

 

Do you design out the 51 litres of a Waterhog, or whatever container you attach to the inlet? 51 or so litres sloshing/spraying about in a water absorbing caravan such as yours could probably do some serious damage

Wow a £20k Alde system, what system designer designed that to fit in a £25k caravan, no wonder the other parts are poor quality.  

The waterflow has a pressure reducing valve inline.

The world used to be flat, and as a kid I fell off me bike  It ain't and I still cycle 

Risk assessment then personal choice.

I've had both systems and, for me, the better system is the valve in the Aquaroll (or similar container). Pressure reduction systems reduce the pressure so much that the flow is severly affected especially a shower. There is also the possibility of failure of the reducer that then blows one of the connections in the caravan and sod's law says the connector will be in a totally inaccesible place.

With the valve in the Aquaroll the pressure in the caravan, which is delivered from the normal pump whether external or inboard, is excatly the same as it would be without the valve in the barrel. All the valve does is automatically keep the Aquaroll topped up at all times (albeit to only about 50% but that makes no difference whatsoever).