It’s four years ago that I fitted the new shower tray in my Avondale Rialto and I’m happy to say it’s still looking good and working well. – If you missed it, see https://jondogoescaravanning.com/renewing-a-shower-tray/

But since I like to use my onboard shower, what I wanted to do was to increase the water flow at the shower head. The taps on my sink and handbasin are fine, but at the shower head – it’s always been rather weak.

My Avondale is fitted with a Whale Watermaster, with an Aquaroll, submersible pump and independent pressure switch, so I began by removing everything from the back of the input socket, down to the cold intake on the Truma Ultrastore.      I purchased a new inline booster pump and then commenced planning a new pipe run from the Watermaster socket. I’ve put in a straight drop to almost floor level then an angled fitting to the in-line pump.      The angle is fitted at such a level so that the pump is held clear of the floor, otherwise, the pump might vibrate against the floor.      A John Guest one-way valve comes next, which is additional to the non-return valve within the Watermaster socket.      Then comes the original pressure switch.       Finally, the new pipe work connects to a Tee fitting directing the cold supply both to the boiler and the taps.  

Since the supplementary pump is only required for the shower, its 12 volt supply is connected to the pump via a switch fitted on the bedding locker..

At the same time, I’ve changed how I control the water flow. The hot and cold shower taps permanently stay open in such a position to give a comfortable water temperature. Then I’ve added a lever-controlled ball valve which controls the flow of water at the shower head. Using the lever, the water can be easily turned on and off throughout my shower without losing the desired temperature.

A recent trip away in the van indicates that the changes have made a worthwhile improvement.