Water and Wastewater Utility Tap Plans

What is a utility tap?
Why do I need a tap plan signed and sealed by a professional engineer?

A Utility Tap plan is a utility service connection to an existing water or wastewater utility main.WATERMAININSTALL
The utility mains are maintained by Austin Water.  Each property that is served or is proposed to be served has to have a single or double utility tap to the property with a separate meter and/or clean-out for each unit on the property.   The Taps Office processes this permit for both residential and commercial customers.

In order to tap the main, upgrade an existing tap, upgrade a meter, cutover from well or septic tank the AWU Taps Office requires a Tap Application to be filed.

There is not an application fee, however, several items are needed in order to process the application. These requirements are different for both residential and commercial.

a-water-The Perales Engineering, LLC team have decades of combined utility design  experience all around the City of Austin and surrounding areas and have a close relationship with the Austin Water Utility review staff and know exactly what is required resulting in a timely plan approval for both private residences and public commercial properties.  Please contact our Utility Tap Plan Department @ 512-220-7070,  info@peraleseng.com for more information.

How do I know if I need a Utility Tap Plan.

The intent of the Utility Tap Plan is to ensure that prior to beginning a residential project, adequate water and wastewater services can be provided to the site and is planned for as part of the overall project and to ensure the applicant is aware of the potential costs and lead times associated with any requirement of relocation, new installation, or upgrade of services to the site.


A Utility Tap Plan is required prior to submitting a residential plan review for the following project types:

• Construction of a duplex, garage apartment or secondary structure unless identified as a volume builder project.
• Remodeling or upgrade to an existing structure that increases the number of total bathrooms, in excess of 4.5, on site.
• Remodeling to an existing structure to increase the number of units on the site (i.e. converting a home to a duplex).
• Remodeling to an existing structure/site causing change to driveway location, garage entry/approach that would impact water/wastewater service placement.

A Utility Tap Plan is NOT required prior to submitting for a residential plan review for the following project types:

• Remodel of an existing structure that is kept under a 4.5 or less bathroom count
• Construction of a swimming pool
• Additions to an existing residence, such as decks
• Projects that are part of a large commercial site project where utility plans are being reviewed by AWU engineers.

WWWSPV_Page_1Creating the Utility Tap Plan.

If a Utility Tap Plan is required, we will complete the WWWSPV verification form and provide a copy of the proposed site layout plan for the site to obtain the existing service locations, meter sizes, static pressure, etc. The proposed site layout plan should be to a standard scale and show all existing features, included existing water meter and wastewater cleanout locations, as well as any proposed improvements such as proposed driveways and buildings in order to complete verification.

We then take the information obtained from the AWU and the WWWSPV verification form and begin the process of creating the Utility Tap Plan set that shall contain at a minimum the elements included on the Utility Tap Plan checklist below:

The Perales Engineering, LLC utility design team have this entire process streamlined and automated to quickly & accurately produce a full set of Utility Tap Plans that are ready for submission for AWU review within a few days of receiving the proposed site layout plan & floor plans.


W&WW Tap Plans
Austin Water Utility (AWU)
Pipeline Engineering
February 19, 2015

Tap plans shall be signed and sealed by a professional engineer, include the engineering firm number, and shall at a minimum contain the following elements on 24” X 36” plan sheets:

1. Project name, address, and owner/applicant.
2. Record Plat, legal lot description, or a Land Status Determination letter.
3. General Location map with Mapsco Page and Grid Number
4. City of Austin water system pressure zone and approximate static pressure.
5. Fire protection demand as prescribed by the 2012 International Fire Code as amended and verified by the Austin Fire Department.
6. Watershed drainage basin.
7. TxDOT Utility In Right-of-Way Permit (if required)
8. Signature block for Industrial Waste
9. Signature block for Fire Department
10. Signature block for Austin Water Utility.

11. Planimetric view (to scale {per AWU UCM 2.5.1.F.3} with north arrow) of the area of the tap and meter/City clean out to include all existing and proposed utilities (underground and surface structures) and appurtenances, water or wastewater line size and material, all structures including but not limited to paving, sidewalks, retaining walls, fences/walls, driveways, landscape areas, trees (size and type), etc.
12. Appropriate spot elevations and contours to adequately describe the area topography.
13. Street names and alleys.
14. Right-of-way (ROW) lines and widths, private and public easements, property lines with appropriately referenced recorded document numbers.
15. City of Austin Grid numbers, water intersection numbers, wastewater profile number, and AWU project numbers.
16. Domestic water demand in gallons per minute (gpm) based on plumbing fixture counts for commercial. If project is residential, indicate the number of bathrooms.
17. Results from fire flow testing if tap is for fire line or sprinkler systems.
18. Standard AWU construction notes and the following “lead free” note:
All potable water system components installed after January 4, 2014, shall be essentially “lead free” according to the US Safe Drinking Water Act. Examples are valves (corporation stops, curb stop, and pressure reducing valves), nipple bushings, pipe, fittings and backflow preventers. Fire hydrants, tapping saddles September 24, 2014 Page 2 and 2-inches and larger gate valves are the only components exempt from this requirement. Components that are not clearly identified by the manufacturer as meeting this requirement either by markings on the component or on the packaging shall not be installed.
19. Proposed utility line size, material, fittings, and appurtenances.
20. Connection method to main.
21. Dimensions from water or wastewater service lines to the nearest lot corner along the ROW.
22. Appropriate standard details from AWU 500 series.
23. Indicate the elevation of the proposed cleanout at the property line and the finished floor elevations for wastewater taps.
24. Indicate installation of roots barrier for mains and service lines that are within 5 to 10 feet of trees. No utility line should be within 5 feet of a tree.
25. For projects with an onsite alternate water source or sources the following criteria must be indicated and included as a note on the plans: High hazard containment backflow prevention (i.e. RPZ or RPDA) is required to be installed 3 inches to 6 inches immediately outside the meter box or immediately downstream of the service connection and on private property. If this cannot be accomplished, the entire service line, from the meter to the RPZ, shall have a concrete cap a minimum of 12” wide and 4” thick centered above the service line.
26. Water meters located on private property must be in an appropriately sized AWU approved and recorded easement.

Additional drawings which may be required can include an Erosion Control Plan and traffic control plan with appropriate details.

Please contact our Utility Tap Plan Department @ 512-220-7070,  info@peraleseng.com for more information.