Reference pumping the fluid by hand/ foot, i wouldn't as has already been highlighted your reservoir could run dry and more importantly doing it manually has in the past ruined a few peoples master cylinders due to damaging internal seals. If i were you i'd get one of these they're brilliant much better than a Gunsons. Just don't make the mistake i made and forget to really tighten up the filler cap or you won't get pressure build up.
http://www.ebay.co.uk/itm/Sealey-VS8...EAAOSw6WdXiScF