Surge chamber D32 Accessories for tanks Overflow with built-in water lock, PVC d32, filling connection 1'' male thread with dummy cap, e.g. to add diluted H2SO4 solution. Spiral Hose d32, length 1.7 m, for connection to sewer system Tank connection: Union nut 1-1/2'' female thread Surge chamber D32 Accessories for tanks Overflow with built-in water lock, PVC d32, filling connection 1'' male thread with dummy cap, e.g. to add diluted H2SO4 solution. Spiral Hose d32, length 1.7 m, for connection to sewer system Tank connection: Union nut 1-1/2'' female thread