The wash kit allows you to direct mains water from a domestic tap or hose fitting to your Optima unit and allows you to divert away used water to a drain.
The inlet hose can pipe heated mains water to thermally prime the tank, this allows a rapid warm up time. The inlet hose can also be used to pipe cold mains water to the tank, this (along with wash dividers) allows a density specific wash process as described in the Optima12 trailer.
All fittings are readily available hozelock fittings. Inlet and outlet pipe lengths are 2m and 2m as standard but can be ordered longer.