Satellite Water Station

Work at the far edge of a holding - watering trees, filling a trough - keeps sending somebody back to the house for water. A satellite water station is a tap put out there instead: an upright pipe fed by a buried line from storage nearer the centre. It holds nothing and produces nothing. Its value is putting water that already exists where the work is, and the trenching and pipe work are within an owner's reach, not a trade's.

Two things decide whether it works. The first is friction, which eats pressure along the run: at a given flow a 25 mm (1 in) line loses about twice the head of a 38 mm (1.5 in) one, so anything narrower than 25 mm is seldom worth laying and runs past about 400 m (a quarter mile) should step up a size. Bends cost pressure too, so a meandering trench can lose more in fittings than in length. The second is burial depth: the line must sit below the depth at which the ground freezes locally, with margin, since that depth varies widely within one region and wet compacted soil without snow cover can freeze about 0.6 m (2 ft) deeper than the published figure.

Three things then go wrong. The line freezes and splits unless drained or otherwise protected before the first hard freeze, which is why valves or unions belong at the low points. Back-siphonage matters most, because nothing announces it: shut the flow off while a hose end lies in a trough or puddle and the pressure drop can draw that water back toward the supply, so a one-way valve at the outlet is standard and gets checked yearly. Stagnation is the third: a tap used a few times a month is a dead leg where water stands, losing any disinfectant and letting growth return, so it is flushed before any use where quality matters. Underfoot, a stabilised pad keeps the outlet out of mud, crowned to shed water and reaching about 3.5 m (12 ft) out, its fine top layer renewed every three to five years.