Waterline takeoff: linear footage, fittings, valves and hydrant counts

Water main takeoff differs from gravity work in one important way: the pipe is the cheap part. Fittings, valves, restraint, hydrant assemblies, testing and disinfection can rival the linear cost, and every one of them is a counted item you either find on the plan or leave out of your bid.

Measure the main by size and material

Trace the alignment along the pipe centerline, splitting wherever size or material changes. Water main usually follows a consistent depth of cover, so depth banding matters less than it does for sanitary — but note where cover increases at crossings, creeks and ditches.

Count the fittings deliberately

Fittings hide in plain sight. Every direction change, branch and size change is a fitting, and most plans label them only with a small callout. Work the alignment end to end and count as you go rather than sweeping the sheet for text.

• Bends: 11.25°, 22.5°, 45°, 90° — each a separate line item.
• Tees and crosses at branch points, sized by both runs.
• Reducers at every size transition.
• Caps, plugs and blow-offs at stub-outs and temporary ends.
• Restraint: mechanical joint restraint, thrust blocks, or both per the detail.
• Tapping sleeves and valves for connections to existing main.

Restraint quantity is usually driven by a table in the details that lists restrained length per fitting size and deflection. Take off restrained length per fitting rather than assuming a flat allowance.

Hydrant assemblies are bundles

1. Hydrant itself, with the correct barrel length for the depth of cover.
2. Anchoring tee on the main.
3. Auxiliary gate valve and valve box.
4. 6" lead from tee to hydrant — measure it, do not assume a length.
5. Thrust block or restraint, plus stone drainage at the base per the detail.

Services and meters

Domestic and irrigation services are counted per connection and measured per run from the main to the meter or right-of-way. Capture size, corporation stop, curb stop, meter box or vault, and any backflow assembly. On commercial jobs the fire service, its detector check and the vault are often the largest single water items on the job.

Testing, disinfection and the items in the notes

• Pressure and leakage testing, priced per LF or lump sum.
• Chlorination, flushing and bacteriological sampling.
• Connection windows and required shutdown coordination with the utility.
• Temporary water service where an existing line must stay in service.
• Locating and potholing existing utilities before construction.

Reconcile with the utility plan and the specs

Water is the scope most often governed by a local utility standard rather than the drawings alone. Before finalizing quantities, confirm that the pipe material, restraint method and testing scope in your takeoff match the specification section — a plan showing PVC where the utility standard requires ductile iron at crossings changes both material cost and fitting counts.