SUPERB SET: 3 WAY 1 1/4" INSULATED MANIFOLD + 2 WAY 1 1/4" INSULATED MANIFOLD Low Loss Header 70kW 1 1/4" COATED. - 1 1/4" 70kW COATED Low Loss Header. Low-Loss Header also known as Hydraulic balancer serves for separation of boiler’s circulation from heating’s one.
eBay