i want to install a solid fuel stove ..my problem is that i cannot chase the ground for the return and therefore have to run both flow and return up into attic of my bungalow and then drop down to my cylinder in hot press. i will be doing it open vented with an f&e tank etc. did u come across a similar set up before.the plumber has not looked at the job yet,i waanted to find out if it was do able first...the pipework will be inch ..air vents will be installed at high points for commissioniong and a 3 bar blow off as an extra safety precaution next to stove[piped to outside] a friend of mine is a plumber and this was his ideas on the job..he said it is not an ideal set up but it will work fine as long as the pump is running... if pump fails then the expansion pipe will take the excess heated water and the cold feed will let cooler water down to the boiler????