Composite(SMC) Water Meter Box: 1.EN124, ISO9001 2.14 years experience 3.A15,B125,C250,D400 4.OEM service SMC Composite Water meter ... , comparing to 5 years of cast iron.v Anti corrosion,water, dust and pets tight, well sealed prevent poisonous gas leaking ... emission and during manufacturing process than cast iron covers. Composite Water Meter Manhole Box