Discuss Injector Tee - How to Make Up One Onsite in the Plumbing Jobs | The Job-board area at PlumbersForums.net
TBH it's easier just to buy one
Cut a 22 x 15 reducer down to a couple of mm . Insert this in the 22 end, with the 15mm part going into the tee. This leaves the 22mm end ready for the heating return.
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