Cast iron monoflo tee. Webb. The supply tee will be installed backward. Only one fitting is needed for most installations for adequate diversion for upfeed radiation. Since hot water is hard to push down, you will need two monoflo tees. The flow will enter the tee toward the small side of the venturi, acting as a scoop and forcing the water down. Find patented Monoflo fittings from Bell & Gossett, as well as generic options from other renowned manufacturers. Recommended for most installations including cast iron non-ferrous baseboards, free-standing radiation or convectors. The arrow will point against the direction of the water flow. Complete system setup, maintenance, or repair with a Monoflo fitting from F. W. xcffgi udl ydvksx qzldey iulg uxsu kqxgjjh vbdbu hylngr mxn