NC Pipe manholes are manufactured to ASTM C-478 standards and/or local code requirements.
Standard products consist of the following:
48" Dia. Sanitary Manhole w/ NC Base
48" Dia. Sanitary Manhole w/ Variable Height Base
48" Dia. Sanitary Manhole w/ Eccentric Cone & NC Base
48" Dia. Sanitary Manhole w/ Eccentric Cone Variable Height Base
60"/48" Dia. Sanitary Transition Manhole
60" Dia. Sanitary Manhole w/ Flat Top
60"/48" Dia. Sanitary Transition Manhole w/ Eccentric Cone
72"/48" Dia. Sanitary Transition Manhole
72" Dia. Sanitary Manhole w/ Flat Top