Water tank plumbing uses John Guest push fittings with retaining clips and collets.
Twin taps- the lower is gravity fed, the other is pressure. Our camp wash up bowl and cray cooker pot sit on the step for filling without having to hold.
There’s also a valve at the tank, when that is closed the pump will draw through the lower tap from a head height of 8’ (according to pump manufacturer), for filling from fresh water stream, low level tank, or pre-warmed water in the big pot for a warm shower.
The orange click on fittings are blocked with hot glue, just to keep crud out of the taps.
Filler has a click on fitting too, with the female part mounted to pack rack to retain it, shown disconnected here.
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