when people's bacchi start leaking they always look to replace the seals

they are seldom at fault - they last for an incredibly long time

the first thing to do if your bacchi isn't performing is to lube the bores - olive oil will do if its all you have, but you will need to reapply it fairly frequently, ie. every time if you are washing your bacchi in detergent (which is not recommended - cold water is enough)

if a lube doesn't stop it losing pressure (if it isn't lubed it is likely to bind in the bores) i can almost 100% guarantee the base is warped

don't think it warps like a banana - it doesn't - it is so slight you will not be able to eyeball it

if you want to see it you need to lather up some detergent in water, then smear some around the perimeter of the base (removed from the machine, and hold the rim that the o-ring seat on against a piece of glass and see if the base rocks on the glass at any point or if bubbles appear at any point where the face of the base meets/doesnt meet the glass

again, the seals are almost never at fault & the bases we have now are made from extruded aluminium so we can guarantee they won't warp again

if you have one of the original springs & its rusting, that is because they are made from poorly galvanised steel

we lobbied caffemotive to switch to stainless steel springs & we've got loads in stock, so if you want to eliminate the rust stains in your bacchi, we have the answer