Allsite.ai extended data is automatically added to pipes and structures on creation.

Level AI factors in the storm and sanitary networks if "Servicing Enabled" in the run, this will project minimum pipe grades up the roads from existing manholes/pipes and any lift stations / outlets into lots. PUBLIC PARK and PUBLIC DRAINAGE type lots are excluded from this analysis. This sets a 'floor' for the design accounting the minimum pipe clearances under roads/pervious.

Service AI takes the existing connections and designs the catchments and networks as per the subnet (sub network)'s configured.

Network / Part Library

Select the network for storm and sanitary via drop-down - this is where the pipes and structures created by Service AI will be put. This dropdown is mirrored on Allsite.ai.

When structures and pipes are added for in these networks they will get property data automatically assigned indicating whether a storm / sanitary node.

Via the Allsite.ai you can then set the part family to use Storm and Sanitary pipes and various structure types. This informs Service AI the parts to select from. If no part family is selected the family that was used for any existing pipes/structures and/or family with the most part sizes is selected.

Storm/Sanitary Settings

Below are the storm and sanitary settings configurable in your Allsite.ai project, grouped by category.

Network placement

Setting	Description	Network
Network placement	Desired network paths within the road corridor and parcels — offset distance from road centreline, curb, or road extent (the road corridor edge adjacent to residential parcels).	All
Default normal lot pipe connection	Default pipe connection method for NORMAL-category lots (surface single/multiple discharge point [storm], piped front, piped rear, or piped front or rear).	All

Cover

All of these are measured downward from the ground surface to the top of the pipe, and they form an ordered ladder — each minimum must be shallower than its matching maximum, and every maximum must stay shallower than the maximum network cover, the single hard limit no pipe may cross. Settings that were previously labelled “depth” are now labelled “cover” — they have always been the same measurement.

Visual example with some arbitrary values added showing the various cover settings.

Setting	Description	Network
Road minimum cover / Road maximum cover	Minimum and maximum cover for pipes under roads (from top of pipe); can be overridden per pipe. Also informs Level AI.	All
Other area minimum cover / Other area maximum cover	Minimum and maximum cover for pipes under pervious / other areas (from top of pipe). Also informs Level AI.	All
Preferred minimum cover / Preferred cover / Preferred maximum cover	The cover band Service AI aims for between the hard limits — a preferred minimum, a target, and a preferred maximum.	All
Building minimum freeboard	Minimum drop between a building and the pipe (from top of pipe). Also informs Level AI.	All
Maximum network cover	Maximum cover the network can reach (from top of pipe) — increase this if using a deep lift station. Also informs Level AI.	All

Pipes

Setting	Description	Network
Pipe grades / default minimum grade	Table of pipe grade limits by pipe size; the default minimum grade applies to sizes not in the table. Level AI uses the minimum grade for the largest pipe size when assessing serviceability.	All
Grade limits (max + preferred)	Maximum allowable pipe grade, plus the preferred minimum/maximum grades Service AI targets.	All
Pipe length (min / max)	Shortest and longest pipe run allowed between structures — each with an absolute limit and a preferred target.	All
Minimum pipe diameter (private / public)	Smallest diameter allowed for private and public pipes.	All
Minimum catchment area	Minimum catchment area threshold used in sizing.	All
Pipe roughness	Material-specific Colebrook-White wall roughness for capacity/HGL calculations, plus a default roughness for materials not listed. (Manning's n on the Civil 3D pipe is used when the hydraulic method is Manning-based.)	Storm

Structures

Setting	Description	Network
Manhole deflection	How much a pipe run can turn through a manhole: a preferred maximum angle (default 95°, a soft target) and an absolute maximum (default 120°). The preferred angle must be less than the maximum.	Preferred: All · Max: Storm
Minimum manhole wall distance	Minimum distance from a pipe connection to the manhole wall.	All
Manhole benching type	Benching configuration used for manhole hydraulic checks.	All

Capacity assessment

Setting	Description	Network
Design storm sizing	Up to three design storms — Average Recurrence Interval, duration source (fixed duration in hours if applicable), sizing method (HGL or Flow at Grade; depth to HGL if HGL), and whether to include node headloss.	Storm
Load & flow method	Methods used to calculate design loads/flows and to assess pipe hydraulic capacity.	All
Runoff parameters	Manning's n (pervious / impervious), pervious curve number, and SCS D value used in runoff calculations.	Storm
Saddle head loss K	Head-loss coefficient for saddle connections.	Storm
Peaking factors (DWF / WWF)	Dry-weather and wet-weather flow peaking factors.	Sanitary

Network clearances

Setting	Description	Network
Network clearance parameters	Horizontal and vertical clearances between the different networks.	All

Overland flow paths

Setting	Description	Network
Saw-tooth overland flow paths on	Master toggle for saw-tooth flow paths. Lets Level AI place the low points on the inlets along any overland flow path whose type is SAWTOOTH INLETS.	Storm
Saw-tooth flow path minimum drainage grade (%)	Minimum grade along a saw-tooth flow path. Level AI works the tooth lengths out from it, so it sets how long each tooth runs. Applies only where the flow path carries no minimum grade of its own.	Storm
Maximum highpoint to highpoint length	Furthest apart two high points on a saw-tooth flow path may be, capping how widely the teeth are spaced.	Storm
Minimum highpoint fall depth	Least fall required away from a high point. Divided by the maximum highpoint to highpoint length to give the flattest grade a saw-toothed flow path may sit at.	Storm
Maximum ponding depth	Deepest ponding allowed when Level AI checks that a saw-tooth flow path drains.	Storm

Hydrology Settings

Rainfall IDF defines the rainfall intensity, duration, and frequency data used for stormwater design.

An IDF curve tells Service AI how intense a storm is expected to be for different storm durations and return periods. Shorter storms generally have higher rainfall intensity, while rarer storms generally have higher rainfall intensity than more frequent storms of the same duration.

Use project-specific rainfall data where available. For United States projects, this may come from sources such as NOAA Atlas 14.

Term	Meaning
Intensity	How hard it rains, usually expressed as mm/hr or in/hr.
Duration	How long the storm lasts, such as 5 minutes, 15 minutes, 1 hour, or 24 hours.
Frequency	How rare the storm is, often expressed as a return period such as 2-year, 10-year, 25-year, or 100-year storm.

Update hydrology data for the project on the Project Properties -> Hydrology Data tab.

Tip: set up localised hydrology data in your template project for the region that way new projects will all inherit the correct data.

Storm / Sanitary Networks