Before commencing any maintenance, shut off the air supply and exhaust the downstream pressure. This can be done with an exhaust type ball valve. Plug-in Filter Regulator. High efficiency water and particle removal Zinc body and yoke Aluminium bonnet Sintered plastic element material 40μm filtration size Aluminium collecting bowl 0.2 litre with liquid indicator Bowl is quick release bayonet Yoke required to fit Repair kit, all serviceable parts