If you have an indirect water supply system, the water coming into your house to the rising mains straight up to the cold water storage tank in the loft, with a branch off to your kitchen tap (and maybe an outside tap in the garden). East London Plumbers can fit this unit.A water softener diverts this cold water feed through the softener treatment tank before returning it to the pipe that feeds the cold water storage tank in the loft. This means that the water used in the majority of the house, including the central heating system, hot water, cold water to bathrooms and the WC cistern, is all treated by the water softener. If you have the time and money, it is sometimes better to connect the WC cistern directly to the rising main before the softener, and fit a small nozzle in the ballcock valve in the WC cistern. (This is because toilets consume a lot of water during flushing, and although it may occasionally be necessary to use a descaler in the WC pan, the consumption of softened water will be considerably reduced by the implementation of this measure). Although it can seem a bit fiddly, plumbing for the water softener must be installed correctly or there is a risk of water contamination.Connecting up.Working from the mains stop cock (under the sink), fit a one-way valve with the flow direction heading into the house, a small draincock, a washing machine style valve for the feed to the softener, a service valve (fitted with a knob) to divert the water flow through the softener (and to bypass the softener if it is out of action), and another washing machine tap (the return from the water softener). Use valves that have a quarter turn action, which are fitted with a knob that indicates whether the valve is open or closed. With servicing, this makes it easier to see at a glance whether the water softener is in flow or bypass mode. An East London Plumber can service this appliance.