If you want to fit it yourself thats up to you and I don't mind helping... it sounds like health and safety and control of pollution isn't really much of a concern where you are so why not...
As you're fitting an oil boiler a CORGI registered engineer would not be required even in the UK.. OFTEC is the organisation that cover the installation of oil fired boilers and actually you don't have to use one of them in the UK either...anybody can install an oil boiler here but you do have to have it checked out by Building Control ifyou're not registered... but as you are in Estonia I guess you can do what you want....
You could use 6mm pipe but if it says 10mm in the book use 10mm it will not make any difference to the boiler... the fittings are very standard things, all you need to do is ask the supplier to give you the correct fittings (3/8 or 1/4) to go with your filter, fire valve etc etc ....... they will know what you want and put them all in the bag...... also buy some oil seal paint.
I think fitting a fire valve would be a bit of a waste of money if the tank is only a meter from the boiler as it's purpose is to stop the oil entering the building !!!!!
My advice, should you boiler catch fire is.... RUN LIKE F*** and tell the Estonian fire brigade to use foam and not water to put your house out..
As you're fitting an oil boiler a CORGI registered engineer would not be required even in the UK.. OFTEC is the organisation that cover the installation of oil fired boilers and actually you don't have to use one of them in the UK either...anybody can install an oil boiler here but you do have to have it checked out by Building Control ifyou're not registered... but as you are in Estonia I guess you can do what you want....
You could use 6mm pipe but if it says 10mm in the book use 10mm it will not make any difference to the boiler... the fittings are very standard things, all you need to do is ask the supplier to give you the correct fittings (3/8 or 1/4) to go with your filter, fire valve etc etc ....... they will know what you want and put them all in the bag...... also buy some oil seal paint.
I think fitting a fire valve would be a bit of a waste of money if the tank is only a meter from the boiler as it's purpose is to stop the oil entering the building !!!!!
My advice, should you boiler catch fire is.... RUN LIKE F*** and tell the Estonian fire brigade to use foam and not water to put your house out..