water pressure from water cache barrels...

[mikebratcher69]

When the mains water goes off.....

I was just watching a video where this guy had placed his water cache barrels up on a couple of pallets to give a liitle bit of water pressure from the barrels.
I then remembered ou hand pumped fence sprayer for spraying fence paint, which has to be pumped up by a hand pump and them you can spray away merrily for a while.
If you got and utilised the sealed plastic barrels for water cacheing, could we not retro fit an attatchment say to the garden water tap and instead of the water coming out, provided the house mains tap was off so the water didnt clear off down the mains pipe, would the water then go into the house water system instead, thereby allowing us, if we could generate suitable mains pressure inside the barrel of 1.5 bar (21.7 psi) to have our normal house water system function again??
Now maintaining a pressure of that ammount by hand would require constant work, does anyone know of a alternative way we could power the pump to produce the pressure or maybe just pressurise it once a day.