Dual central heating system

I think we need to know whats there now, whats going to be added and what you want it to do.

There is an existing solid fuel boiler, with gravity system on hot cylinder and radiator teed off this with a pump. My understanding is that I can just tee into the main flow and return with my flow and return from my oil fired boiler. I was told that I need to put in check valves so that I don't turn the out of use boiler into a radiator that just puts heat up the flue. The other question was do I need a second pump to drive the water into the Oil burner instead of the solid fuel.

I appreciate any advise or a link to a site that has a suggested flow circuit drawing

thanks Fred

In the UK, we have these things called Dunsley Neutralisers that allow gravity circulation from a solid fuel system and a separate boiler to be installed. They are fail safe in that whatever happens, the solid fuel circuit will still circulate, rather than blowing up the range/stove.

I don't know if US practice is different.

Christian.