The mud box is used to stop the sundries and the sewage sludge block in the bilge water. Design Standard: JIS F7203-1996 Test Standard: JIS 7200-1996 Hydraulic Test Pressure: Body- 0.1Mpa Flange size as per JIS B2220 - 5K Main Material: Body: Cast Iron (FC200) Bonnet: Cast Iron (FC200) Cover Push: Cast Iron (FC200) Strainer: SS400 or SUS304