Undoing fittings on water housing

Here’s a cutaway view of how they work.

Hope this helps

I'd suggest the smaller black collar on the elbow is squeezed towards the elbow at the same time as you pull the fitting away from the filter ..... it'll need to be square to the pipe

I use an open ended spanner or an adjustable spanner just wide enough to clear the tubing to pull back the compressable ring.  This works well for me  - household plumbing and the van

First job would be to remove the blue caps which are a locking system!John Guest can supply a set of plastic tools for depressing the collar on the fitting whilst removing the pipe if you are unable to push it in manually.Looking at your photo I would suspect that the timber insert should be replaced while you have the unit removed.

Hi we have a 2017 bailey autograph motorhome and I think the pump must air in, I am unable to get water coming through the taps after winterizing. Can anyone tell me where the pump is located please.