48″ I.D. Manhole

48" Inner Diameter Precast Sewer Manhole

Precast concrete manholes are an integral component of any modern sewer or storm drain system. Precast concrete manhole sections are produced in a controlled environment, thus exhibiting high quality and uniformity. CalPortland’s precast manholes are manufactured to meet or exceed the requirements of A.S.T.M. C478 specifications shown and are continually followed to assure close fit and strength for standard manhole entrances.

PRODUCT OPTIONS:

  • 5″ Wall
  • 6″ Wall

We follow the ASTM C478 standard

PRODUCT NOTES:

  • Cone
  • Flattop
  • Shaft (Center & Bottom Sections)

CALPORTLAND CONCRETE PRODUCTS

519 South Benson Avenue, Ontario, CA 91762

CALL US: (909) 983-9789

HOURS

Monday7:00AM-4:00PM PST
Tuesday7:00AM-4:00PM PST
Wednesday7:00AM-4:00PM PST
Thursday7:00AM-4:00PM PST
Friday7:00AM-4:00PM PST
SaturdayClosed
SundayClosed