How bad of an idea is this?

[Mouldy]

http://www.ebay.co.uk/sch/i.html?_fr...inder&_sacat=0

[Tim The Plumber]

http://www.ebay.co.uk/sch/i.html?_fr...inder&_sacat=0

Thanks but...

Let's assume I am going with this;

http://www.ebay.co.uk/itm/Hydraulic-...Sh7-lt9AzHIgpg

With a 25mm rod size and a 250mm stroke and a bore of 40mm.

How much force do I get out of it? What pump and stuff do I need? Errrr???? Help......