What water filter does my van use?

PTline

Hi all,

New to the site. I have just got a caravan, first time me and the kids are going to be going away in it soon, so I am in the process of buying supplies and doing the checks, The van is a Fleetwood Garland 148-4 (1991) and I have no idea what water filter
it uses, and it needs to be replaced. Does anyone here know, or can direct me to a place I can find out. Thanks!