... control valve (stop valve construction) for heating line system. Plastic switch, MXF 3/4 inch or 1 inch MXF 3/4 ... inch main flow, 2-way or 3-way, 4-way distribution and control stop valve with plastic switch for heating pipeline systemCW617n ... Brass body and brass stop, nickle plated main body,Plastic switch (handle)2 WAY, 3 WAY, 4 WAY options,Main flow DN20 ...