We believe the range of plumbing fittings available on the Fish Fur and Feather website is the most extensive available on any UK aquatics website. All our pipe is fully fish safe and has been used by us for many years, most joints are glue fittings using standard 'solvent weld' glue available from us or most DIY shops. All our pipework is metric and directly compatible with all European pipe such as VDL. Some hex adapters and hosetail fittings have imperial sized threaded connections. This pipework is also directly compatible with Aqua Medic, Deltec, Surchan and almost all European equipment. It will not fit directly onto most U.K. sourced pipework without a metric to imperial adaptor. If you are in any doubt please contact us for advice.