Precast Vaults for Double Check Backflow Preventer

                          
Drawings of Precast Vault

Valvebox Installation

Precast Concrete Vault

Water Line
Size

Back Flow Preventer
Average Dimensions.

a Length

b Length

c
Length

d
Width

e
Height

f
Wall
Thickness

g
Top
Slab

Total
Weight
(lbs.)

4"

52" long

28" tall

6'0"

3'0"

4'0"

6" or 8"

HS30 loading
6" or 8"

7,350

6"

66" long

38" tall

7'0"

3'0"

5'0"

6" or 8"

6" or 8"

11,350

8"

72" long

48" tall

8'0"

4'0"

6'0"

6" or 8"

6" or 8"

15,350

10"

82" long

58" tall

9'0"

4'0"

7'0"

6" or 8"

6" or 8"

17,350
Reinforcements in Precast Vaults comply with ASTM A-82 and A-185.
Contact our plant for modifications.
Precast floors with sleeve openings for water lines are optional.