As Jennifern, I'd recommend the Aquaroll auto-fill type system (ball valve etc).
The kits that connect direct to the van have a pressure reducer in them to ensure the pressure is adequate for van use, however if you ever have an internal pipe come off, then water will flow into your van, causing flooding; I know as I witnessed this twice last year.
The Aquaroll system tops up the water and draws into van on demand from the taps, so considerably less risk to flooding.
The Aquaroll brand is a daft price; I bought mine from this guy on FleaBay and it works a treat.
Of course, the option is just to manually fill the barrel; you don't have to use auto-fill just because of being on a serviced pitch.
* This post contains affiliate links. If you click through and make a purchase, as an eBay Partner Network member we may earn a commission from qualifying purchases, at no extra cost to you.
A day of all things motorhome and campervan. The show is held both in the main indoor arena and across the grounds. Catering, hot drinks and food options are available. Easy access to the site and free parking included. Win one of five pairs of day tickets