Skip to main content
Loading…
Article II. Wetwell
This article is included in your selections.
This section is included in your selections.

The wetwell for submersible, nonclog pumping stations shall be of reinforced concrete construction with walls coated with coal tar epoxy up to the platform elevation. The epoxy coating shall be system No. 12 per WSSC Standard Specification Section 09900.

The wetwell for submersible grinder pumping stations shall be of fiberglass reinforced polyester (FRP) or of reinforced concrete construction and shall have a circular cross section. Wetwells made of reinforced concrete shall have their walls coated with coal tar epoxy up to the platform elevation. The epoxy coating shall be system No. 12 per WSSC Standard Specification Section 09900.

The roof slab shall be of reinforced concrete and shall be a minimum of six inches above final grade with the exception of roof covers for submersible grinder pump stations that use FRP basins which shall be of aluminum and shall be a minimum of one inch above final grade. All conduit and pipe penetrations shall be made watertight and sealed to withstand a minimum of 25 feet of head of water.

A general arrangement of equipment in the wetwell, including access, ventilation, etc., is shown on Drawings DG-08-01, DG-08-01A, and DG-08-01B. (Design Guideline DG-08 § 5.1, dated August 2006)