N
namsag
YEp it certainly looks like a bypass (first connection after pump) and providing you don`t have trvs on every rad then just close it .
mid position valve will always have an open port to allow a flow in fault conditions a lot of people add them even though not a requireent on mid position system
mid position valve will always have an open port to allow a flow in fault conditions a lot of people add them even though not a requireent on mid position system
