Roto-moulded in 5mm minimum thickness polypropylene, suitable for grey or black waste. Nine plumbing connection ports all 1 1/2″ BSP threaded. The and 132212 macerator toilet pump can be directly threaded into any of these connection ports, without any plumbing required. Tanks are supplied with all ports blank except the top deck pump out port. Simply cut out any required port with a 40mm hole saw and screw in 1 1/2″ BSP fitting. A range of reducers are available to convert the 1 1/2″ BSP port to smaller BSP diameters.