Go plastic young man

Apart from letting water in, we also need to let wastewater out – the drain from the sink and washbasin and the aforementioned toilet, hopefully via a holding tank system.

Each of which requires three components – a skin- or through-hull fitting, a seacock to control the flow of water (in or out), and a system of hoses and clamps to get the water to or from where it needs to go.

By and large these components work satisfactorily. Because they have no actively-moving parts, there is very little to go wrong. The main problems affecting them are age, exposure to seawater, solvents or UV rays (for a long period), and marine