for example, weighted plastic jugs filled with water or toilet dams that hold back a reservoir of water when the toilet is flushing (USEPA, l991b).
(weighted plastic jugs; filled; with water or toilet dams) (water or toilet dams; hold back; a reservoir of water) (the toilet; is flushing; )
weighted plastic jugs water or toilet dams the toilet
filled hold back is flushing
with water or toilet dams
a reservoir of water