Good Engineering Practice for Northern Water and Sewer Systems
Good Engineering Practice for Northern Water and Sewer Systems
Good Engineering Practice for Northern Water and Sewer Systems
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Figure 3.2 – GNWT Access Vaults<br />
.1 Recommend vault tops be 450<br />
mm above grade.<br />
.2 Recommend both sewer <strong>and</strong><br />
water access be in the same<br />
vault.<br />
.3 Recommend both interior <strong>and</strong><br />
exterior be s<strong>and</strong>blasted <strong>and</strong><br />
epoxy coated.<br />
3.3.5 Prefabricated Insulated Double-<br />
Walled HDPE Vaults<br />
Recommended <strong>for</strong> smaller access<br />
vaults in lieu of double-walled steel.<br />
Vaults remain accessible <strong>and</strong> visible <strong>and</strong> are not subject<br />
to surface runoff entering the vault.<br />
Combined vault is less expensive than separate vaults.<br />
To protect metal surfaces from corrosion.<br />
Less expensive than steel versions. Lighter in weight<br />
<strong>and</strong> not subject to corrosion.<br />
Photo 3.5 – HDPE Access Vaults<br />
GOOD ENGINEERING PRACTICE 3-6 Apr-04<br />
Access Vaults <strong>and</strong> Manholes
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