11 [ Plumbing supplies, namely, sinks, sink trainers, traps; ] water supply and distribution installations in the nature of installations composed of metal pipes; [ bends, branches, T-branches; accessories for pipes, namely, ring seal sockets, expansion sockets, couplings, socket plugs, bottle traps, P-traps, S-traps, pipe hangers, expansion anchors, ] clamps, [ earth continuity clamps, socket plug clamps, ] floor drains [, trench drains, roof drains; drain gutters and parts thereof, namely, grates, O-grates, funnel grates, laddershaped grates, shower grates, non-slip grates, non-slip ladder grates, frames, cleanouts, traps, bell traps, vertical outlets, sediment containers, gutter angle pieces, T-pieces, endplates, filter baskets; and parts thereof; drainage, waste-water and sewer installations in the nature of installations composed of metal pipes; bends, branches, T-branches; accessories for pipes, namely, ring seal sockets, expansion sockets, couplings, socket plugs, bottle traps, P-traps, S-traps, pipe hangers, expansion anchors, clamps, earth continuity clamps, socket plug clamps, floor drains, trench drains, roof drains; drain gutters and parts thereof, namely, grates, O-grates, funnel grates, laddershaped grates, shower grates, non-slip grates, non-slip ladder grates, frames, cleanouts, traps, bell traps, vertical outlets, sediment containers, gutter angle pieces, T-pieces, endplates, filter baskets and parts thereof ]