Are electronic signatures valid?

Yes. Electronic signatures are generally legally binding under the ESIGN Act (15 U.S.C. §7001) and state UETA laws where adopted, provided intent, consent, attribution, and retention requirements are met.

When is a PE stamp required?

Many jurisdictions require a licensed Professional Engineer’s seal on calculations used for permitting or construction; check the local building department or state engineering board for exact requirements.

What if reviewers cite unit or rounding issues?

Reconcile unit systems, show conversion factors, and document rounding rules in the assumptions section; thorough intermediate values reduce misunderstanding and rework.

Can I submit signed PDFs electronically?

Yes. Electronic submissions are common; confirm the permitting authority’s accepted formats and whether they require notarization, additional certification, or specific file standards.

How long should I keep signed calculations?

Retain originals for the project life plus several years; many organizations keep records seven years post-completion and follow federal minima (IRS three years) and any state-specific retention rules.

What if a calculation error is found after approval?

Issue a corrective revision with marked changes, include a clear revision note, and obtain new approvals or stamped sign-offs as required by the permitting authority and contract terms.

Electronic Signature
Templates
Miscellaneous
Hydraulic Calculations Template

Hydraulic Calculations Template

This template is fully customizable. Edit the text, fill out the fields, and send it for signature. Give it a try!

HYDRAULIC CALCULATIONS TEMPLATE

Client Name:

Service Provider (Engineer):

Project Title:

Project Location:

RECITALS

WHEREAS, Client desires that Service Provider perform hydraulic engineering calculations, analysis, and documentation for the Project described above in accordance with accepted engineering practice and applicable codes; and

WHEREAS, Service Provider represents that it is qualified, experienced, and holds all necessary licenses to perform such hydraulic calculations and related technical services; and

WHEREAS, the parties wish to set forth the terms and conditions under which Service Provider will perform the hydraulic calculations and deliver the required documentation.

SCOPE OF WORK

Scope Description Design Criteria

Design Flow Rate (Q): Design Velocity (V):

Fluid Density (ρ): Fluid Viscosity (μ):

Operating Temperature: Allowable Pressure (max):

PIPE & FITTINGS DATA

Pipe Material

Nominal Internal Diameter (D):

Pipe Length (L):

Absolute Roughness (ε):

Equivalent Length of Fittings (Leq):

CALCULATION RESULTS

Reynolds Number (Re): Friction Factor (f):

Head Loss per Unit Length (h_f / L): Total Head Loss (ΔH):

Pump Required Head: Pump Required Flow:

Calculation Notes, Assumptions and Limitations

PAYMENT TERMS

Contract Amount:

Payment Schedule

Late Payment Fee:

TERM AND TERMINATION

Commencement Date: Estimated Completion Date:

Either party may terminate this Agreement for cause upon written notice if the other party materially breaches any obligation and fails to cure within days after receipt of written notice. Termination without cause requires days' written notice.

CONFIDENTIALITY

Each party shall maintain in confidence all proprietary and technical information disclosed by the other party in connection with this Agreement and shall not disclose such information to third parties except to its employees and consultants who have a need to know and are bound to confidentiality obligations at least as protective as those set forth herein. Confidential information does not include information that is or becomes public through no breach by the receiving party or is independently developed by the receiving party without use of the disclosing party's confidential information.

Upon termination or expiration of this Agreement, the receiving party shall promptly return or destroy confidential material as directed by the disclosing party and shall certify such return or destruction in writing upon request.

LIMITATION OF LIABILITY

Service Provider's liability for claims arising out of or related to this Agreement shall be limited to direct damages not to exceed the total compensation received under this Agreement. In no event shall Service Provider be liable for consequential, incidental, special or punitive damages regardless of the theory of liability.

GOVERNING LAW

This Agreement shall be governed by and construed in accordance with the laws of the State of without regard to conflict of law principles.

ENTIRE AGREEMENT

This Agreement, including all exhibits and referenced documents, constitutes the entire agreement between the parties with respect to the subject matter hereof and supersedes all prior and contemporaneous agreements, representations, and understandings, whether written or oral. Any amendment or modification of this Agreement must be in writing and signed by both parties.

DELIVERABLES & RECORDS

Deliverables shall include calculation notes, summary sheets, electronic copies of models and spreadsheets, and stamped drawings if required. Service Provider shall retain project records for a period of following final payment.

Additional Remarks

Client Printed Name:

By:

Date:

Engineer Printed Name:

By:

Date:

What the Hydraulic Calculations Template Is and When to Use It

A Hydraulic Calculations Template is a standardized engineering worksheet used to document flow, pressure, head loss, pump selection, and piping design assumptions for water, wastewater, or other fluid systems. It centralizes inputs (demand schedules, elevations, pipe lengths, fittings), calculation steps (Darcy-Weisbach or Hazen-Williams, minor losses, pump curves), and outputs (sizing tables, safety margins) so reviewers and permitting authorities can verify compliance with codes and project specifications. The template supports consistent handoff between designers, contractors, reviewers, and permitting agencies during plan submittal and construction phases.

Why a Consistent Template Matters for Accuracy and Review

A clear template reduces rework, speeds reviews, and creates an auditable record of assumptions and results. Standardized fields help ensure regulatory reviewers and licensed professionals can quickly verify compliance with applicable plumbing, mechanical, or utility standards.

Who Typically Prepares or Reviews These Calculations

The Hydraulic Calculations Template is completed and used by multiple technical and administrative roles during design and permitting.

Mechanical engineers and hydraulic specialists responsible for sizing pumps, pipes, and control components.
Plumbing, HVAC, and civil contractors who implement designs and verify constructability on-site.
Permit reviewers and municipal plan examiners who check code compliance and stamp approvals.

Responsibilities often overlap; the licensed Professional Engineer seals or signs where state rules require an engineer’s stamp.

Typical Sections to Include in a Professional Hydraulic Calculations Template

A complete template groups project metadata, design criteria, assumptions, calculations, summary tables, and approval fields so reviewers can trace each result to its inputs and standards.

Project Header

Project name, location, client, and drawing references tied to permit submittal and revision control for traceability and audit.

Design Criteria

List applicable codes, design pressures, minimum velocities, demand units (GPM, L/s), temperature, and accepted safety factors used for calculations and comparisons.

Assumptions

Material roughness, fitting loss coefficients, elevation datum, supply conditions, and any atypical constraints that materially affect computed results.

Calculation Steps

Stepwise math using the selected methodology (Hazen-Williams, Darcy-Weisbach), intermediate values, and units so a third party can reproduce results.

Summaries

Pipe schedules, pump curves, friction loss tables, and a one-page summary of final sizes, velocities, and pressures for plan sheets.

Approvals

Designer signature block, PE stamp (where required), reviewer comments, and revision history for permitting and recordkeeping.

Step-by-Step: Completing the Hydraulic Calculations Template

Follow a consistent sequence from project data to final summary so each result ties to documented inputs and code references.

01

Collect Inputs: Gather demand schedules, elevations, fixture/unit counts, and supply conditions before calculating.
02

Select Method: Choose Hazen-Williams or Darcy-Weisbach and document the reason for the selection.
03

Perform Calculations: Compute friction and minor losses, iterate as needed, and record intermediate values for traceability.
04

Compile Summary: Produce a one-page schedule of final sizes, pump curves, and notes for plan sheets and permitting.

How to Configure an Online Completion and Review Workflow

Set up templates and automated routing so the right parties receive the document for signature and stamping in the correct order.

Field	Configuration
Authentication	Email or SMS code
Template	Upload PDF with fillable fields
Notifications	CC reviewers, set reminders
Archive	Save signed copy to cloud storage

Where to Send or File Completed Hydraulic Calculations

Routing depends on project type; generally send signed calculations to the permitting agency, client, contractor, and project record archive.

Permitting Authority: Submit with plan set and permit application per local requirements.
Client or Owner: Provide the signed calculations as part of the contract record.
Prime Contractor: Share final sizes and pump selections for procurement and installation.
Project Archive: Store the signed document in the project records repository and retention system.

Technical Formats, Integrations, and Authentication to Consider

Use file formats and integrations that simplify review, storage, and signing while preserving calculation fidelity.

File Formats: PDF, DOCX, or XLSX supported
Integrations: Connect to Google Workspace, Box, or NetSuite
Signer Authentication: Email, SMS code, or advanced methods

Required Information Typically Included in the Template

Project Name: Official project title

Project Address: Street, city, state, ZIP

Design Criteria: Code edition and parameters

Fluid Properties: Density, viscosity, temperature

Pipe Data: Material and diameter

Designer Stamp: Name and license

Common Preparation Mistakes to Avoid

Mixing units (psi, kPa, feet) in a single calculation sheet leading to incorrect sizing and reviewer confusion.
Omitting fittings or minor losses which can materially increase pressure drop and change pump selection.
Relying on presumed supply pressures without verifying available conditions at the point of connection.
Submitting unsigned or unstamped calculations where a Professional Engineer’s stamp is required by the jurisdiction.

Risks and Consequences of Incomplete or Incorrect Calculations

Permit Rejection: Delays in approval

Construction Delays: Cost increases

Safety Hazard: Risk to users

Professional Liability: Increased exposure

Code Noncompliance: Remedial work required

Contract Disputes: Claims and litigation

Typical Timelines and Review Expectations

Timing varies by project scale and jurisdiction; plan submittal cycles, review comments, and revisions typically drive the approval schedule.

Preparation:

Complete before permit application

Initial Review:

Local plan check and comment issuance

Response Time:

Resolve reviewer comments promptly

Final Approval:

Permit issue and stamping

Record Retention:

Archive signed documents

eSignature Pricing and Feature Snapshot for Hydraulic Calculations Workflows

Cost and feature comparisons help teams choose a signing platform that supports bulk routing, audit trails, and compliance. Price and feature availability vary by plan and billing model.

	signNow	DocuSign	Adobe Sign	PandaDoc	HelloSign
Starting Price	$8/user/mo	$15/user/mo	$14/user/mo	$19/user/mo	$15/user/mo
Free Trial	7-day free trial	Varies by plan	Varies by plan	Varies by plan	Varies by plan
Bulk Send	Yes	Yes	Yes	Yes	Varies by plan
Audit Trail	Yes	Yes	Yes	Yes	Yes
Envelope Cap	No cap	100 envelopes/user/year	Varies by plan	Varies by plan	Varies by plan

Example Use Cases Showing How the Template Is Applied

These anonymized examples illustrate common project scenarios and how a standardized template improves clarity across stakeholders.

Municipal Water Main Upgrade

A regional utility required consistent deliverables from consultants to compare alternatives and capacity.

Peer review identified a mismatched roughness assumption on the initial submittal.
Final resubmittal included revised friction data, updated pump curves, and a concise cover summary that shortened permit review by reducing follow-up questions.

Multifamily Plumbing Design

A developer needed coordinated plumbing loads for a phased project.

Coordination with mechanical and fire protection prevented clashes.
The template’s summary table and stamped calculations were attached to each permit package, simplifying contractor bidding and procurement across phases.

Frequently Asked Questions and Troubleshooting Tips

Answers address common legal, technical, and administrative questions encountered when preparing and submitting hydraulic calculations.

Need help? Contact support

Are electronic signatures valid?
Yes. Electronic signatures are generally legally binding under the ESIGN Act (15 U.S.C. §7001) and state UETA laws where adopted, provided intent, consent, attribution, and retention requirements are met.
When is a PE stamp required?
Many jurisdictions require a licensed Professional Engineer’s seal on calculations used for permitting or construction; check the local building department or state engineering board for exact requirements.
What if reviewers cite unit or rounding issues?
Reconcile unit systems, show conversion factors, and document rounding rules in the assumptions section; thorough intermediate values reduce misunderstanding and rework.
Can I submit signed PDFs electronically?
Yes. Electronic submissions are common; confirm the permitting authority’s accepted formats and whether they require notarization, additional certification, or specific file standards.
How long should I keep signed calculations?
Retain originals for the project life plus several years; many organizations keep records seven years post-completion and follow federal minima (IRS three years) and any state-specific retention rules.
What if a calculation error is found after approval?
Issue a corrective revision with marked changes, include a clear revision note, and obtain new approvals or stamped sign-offs as required by the permitting authority and contract terms.

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