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Residential Infinity Pool and 4-Person Hot Spa Hydraulic and Mechanical Design We are looking for an experienced swimming pool mechanical, plumbing, or hydraulic engineer to prepare a complete fluid mechanical design for a residential infinity-edge swimming pool with an integrated or adjacent heated spa for approximately four people. Project Overview The project is located in California, USA and includes: >Residential infinity-edge swimming pool >Approximate pool size: 40 ft × 10 ft >Heated square spa for approximately four adults >Preliminary spa size: approximately 7 ft × 7 ft, subject to final design >Infinity-edge catch basin or surge tank >Dedicated pool mechanical equipment room >Pool and spa filtration, circulation, heating, sanitation, drainage, and automatic control systems >Slat pool cover Architectural drawings, pool layout, elevations, site information, and the proposed mechanical-room location will be provided to the selected freelancer. Scope of Work The selected engineer or designer will be responsible for preparing a complete hydraulic and mechanical design, including the following: 1. Calculate the required pool and spa circulation flow rates. 2. Determine appropriate turnover rates based on applicable residential pool standards and local requirements. 3. Design the swimming pool circulation and filtration system. 4. Design the infinity-edge overflow system, catch basin, and surge tank system. 5. Calculate the required catch-basin or surge-tank capacity. 6. Size all piping, including: >Pool suction piping >Pool return piping >Main drains >Skimmer piping >Infinity-edge overflow piping >Catch-basin piping >Spa suction and return piping >Spa jet piping >Spa air piping >Fill-water piping >Drain and waste piping > Filter backwash piping, if applicable 7. Calculate total dynamic head, pressure losses, pipe velocities, and pump operating points. 8. Select and size the following equipment: >Pool circulation pump >Infinity-edge or catch-basin pump >Spa circulation pump >Spa hydrotherapy jet pump >Spa air blower >Pool and spa filters >Pool heater >Spa heater >Sanitization equipment >Chemical-treatment equipment >Automation and control equipment >Valves, check valves, unions, flow meters, and associated accessories 9. Design the four-person heated spa, including: >Recommended finished internal dimensions >Water depth >Seating height and bench layout >Approximate water volume >Number and location of hydrotherapy jets >Jet flow rate and pressure requirements >Dedicated jet-pump sizing >Air-blower sizing >Suction fitting locations >Return fitting locations >Drain and overflow provisions >Heater capacity >Required heat-up time >Operating temperature controls >Spa insulation recommendations 10. Design separate operating modes for: >Pool circulation >Pool heating >Spa circulation >Spa heating >Spa hydrotherapy jets >Spa air blower >Pool-to-spa changeover >Spa spillover, if applicable >Infinity-edge operation >Maintenance or service mode 11. Prepare a valve and control diagram showing how the system changes between pool and spa operation. 12. Review the proposed mechanical-room location and recommend the most suitable equipment arrangement. 13. Prepare a mechanical-room layout showing: >Equipment dimensions >Pipe routing >Valve locations >Service clearances >Access requirements >Floor drainage >Ventilation requirements >Heater combustion-air and exhaust requirements, if applicable >Electrical and control-panel locations >Chemical-storage considerations 14. Coordinate the design with the architectural, structural, electrical, waterproofing, landscape, and pool-construction drawings. 15. Identify required pool and spa safety provisions, including: >Anti-entrapment protection >Dual-drain requirements >Approved suction fittings >Vacuum-release protection, if required >Check valves >Temperature limits >Emergency shutoff requirements >Overflow and drainage protection Required Deliverables The final design package should include: >Pool hydraulic calculations >Spa hydraulic calculations >Flow-rate calculations >Turnover calculations >Total dynamic head calculations >Pipe-sizing calculations >Pipe-sizing schedule >Pump-selection calculations >Equipment schedule >Heater-sizing calculations >Spa heat-up calculation >Infinity-edge overflow calculation >Catch-basin or surge-tank volume calculation >Pool and spa piping plans >Spa jet and air piping layout >Mechanical-room equipment layout >Complete piping schematic or P&ID >Valve and control operating diagram >Equipment specifications >Installation notes >CAD drawings >PDF drawings >Editable hydraulic calculation files, preferably Excel >Final coordinated design suitable for contractor pricing and permit submission Design Requirements The design should be: >Practical to construct >Energy-efficient >Easy to operate >Easy to maintain and service >Compatible with the available equipment-room space >Coordinated with the pool and spa elevations Suitable for California climate and construction practices The designer should recommend the final spa dimensions. As a preliminary basis, the spa may be approximately 7 ft × 7 ft and designed for four adults, but the final size should be based on the seating layout, jet placement, water volume, structural requirements, and hydraulic calculations. Preferred Qualifications >Licensed mechanical engineer or experienced swimming pool hydraulic designer >Previous experience with residential infinity pools >Previous experience designing heated spas and hydrotherapy jet systems >Familiarity with California swimming pool and spa requirements >Knowledge of applicable anti-entrapment and pool-safety requirements >Experience with Pentair, Jandy, Hayward, or equivalent equipment >Proficiency in AutoCAD or similar CAD software >Ability to provide previous design examples Information Required in Your Proposal Please include: >Your relevant pool and spa design experience >Examples of infinity-pool hydraulic designs >Examples of heated-spa or hydrotherapy-system designs >Your proposed design approach >A complete list of included deliverables >The design software you will use >The number of revisions included >Your expected completion schedule >Your fixed-price quotation >Whether the drawings and calculations will be signed or stamped >Whether you are licensed to provide engineering services in California >Any information or drawings you will require from us before beginning Payment Milestones: 1. Architectural Plan 25% 2. Structural plan 25% 3. MEP plans: 25% 4. Review and stamp: 25%
Project ID: 40624234
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18 freelancers are bidding on average $438 USD for this job

As a highly skilled Engineer and CAD Designer, I am confident that I am the perfect fit for your pool and spa hydraulic and mechanical design project. My extensive experience in mechanical design, specifically in creating fluid systems and my proficiency in AutoCAD, SolidWorks, Revit and other relevant software make me equipped to handle this complex project. I can guarantee a well-designed, efficient and safe system while coordinating with other disciplines effectively to ensure a comprehensive design package.
$266 USD in 1 day
5.6
5.6

With over a decade of experience in designing and drafting, which encompasses sophistications like calculating hydraulic flows, sizing equipment, and realizing comprehensive pipe routings and equipment arrangements, I'm confident I have what it takes to meet your project's needs. Additionally, my proficiency in AutoCAD, SketchUp, 3DS Max - perfect software for the venture - guarantees impeccable visual representations of the final design for the underwater spaces. Furthermore, I've had immense exposure to coordinating mechanical builds with allied disciplines like structural and architectural through several projects. This would allow me to seamlessly communicate with these teams to make sure my designs align perfectly with theirs.
$251 USD in 1 day
5.0
5.0

Hello, thank you for your new post. I charge $1400 and proposed 4 milestones for this project I look forward to start the project soon
$1,400 USD in 10 days
4.3
4.3

I am excited about the opportunity to design a stunning residential infinity pool and spa! With my extensive experience in hydraulic design, I'm confident I can create a system that not only meets California’s rigorous standards but also maximizes energy efficiency and practicality. I’ve previously designed several residential infinity pools, ensuring that every drop of water is both aesthetically pleasing and functionally sound. In this proposal, I'll address how I plan to streamline the circulation and filtration systems while also ensuring the fascinating infinity edge is a memorable feature. I will lead the design of your four-person heated spa, paying close attention to the jet placements and comfort. Sharing the required deliverables here, I’ll deliver complete hydraulic calculations, piping plans, and CAD drawings, ensuring every detail is covered for a smooth build. Also, let’s not forget the multiple operating modes between the spa and pool, making it easy to switch for any gathering (or sneaky late-night swims!). Now, about that spa size... If the pool were a celebrity, how would it make a grand entrance? I assure you, my designs are practical, energy-efficient, and tailored to your vision. With my skills in AutoCAD and a license to practice in California, I am ready to take this project from concept to reality! Looking forward to collaborating on a project as refreshing as a dip in a pool on a hot summer day! Best, Talha
$250 USD in 12 days
2.7
2.7

Hello, With over 16 years of experience as a licensed Mechanical, Plumbing, and Hydraulic Engineer, I am the ideal candidate for your Residential Pool & Spa Hydraulic Design project. My extensive knowledge of fluid mechanics and design combined with my proficiency in utilizing industry-standard software like AutoCAD and Revit puts me in a unique position to develop an efficient and problem-free hydraulic system for your infinity-edge pool and hot spa. I have successfully executed numerous residential, commercial, and industrial projects involving grading, drainage, utilities, structural analysis, and MEP systems, just to mention a few. This breadth of experience enables me to fully grasp the complexities your project presents. I understand the need for precise calculation development, equipment selection, sufficient sizing of all piping networks involved, and separate operation modes for distinct system components. Beyond technical expertise, I bring strong project management skills to ensure smooth coordination with architectural teams, seamless integration with electrical plans for automation components installation, and implementation of necessary security measures to guarantee compliance with local safety requirements. Optimal use of the proposed mechanical room space and layout is an area I excel as well. Finally, my commitment to timeliness and client satisfaction places me in an advantageous position to deliver quality work Thanks!
$250 USD in 3 days
0.0
0.0

Dear Client, I reviewed your project requirements and I am interested in working with you. I have extensive experience delivering Plumbing, Mechanical Design, Computational Fluid Dynamics, Mechanical Engineering, Heating Systems and Piping. I focus on understanding the requirements clearly, providing a practical solution, and delivering accurate, well-documented work on schedule. I can review your existing materials, identify the best technical approach, and manage the project from planning through final delivery. You will receive clear communication, regular progress updates, and full support throughout the project. I am available to begin immediately and would be glad to discuss the scope, timeline, and budget. Best regards, Elijah M.
$700 USD in 6 days
0.0
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The infinity edge overflow is where most pool hydraulic designs fail, so I will start there. I will design the weir and catch basin system to handle the pool volume and surge from waves so water doesn't spill over the main pool wall. I will use Computational Fluid Dynamics to model the flow into the weir and through the catch basin, ensuring consistent water levels and preventing air entrainment in the return lines. For the spa, I will design dedicated jets for therapeutic effect and integrate it so it draws and returns water efficiently. I will not implement a shared filtration system for both the pool and spa. The different heating and sanitation requirements make this problematic, leading to inefficient operation and potential water quality issues. Separate systems are better. What is the expected seasonal temperature range for the spa heating in California? I will finish the catch basin design and the primary circulation loop schematics in the first day or two. 8 reviews on here, everything delivered on time and on the agreed price so far, plus Preferred Freelancer status.
$612 USD in 21 days
0.0
0.0

Hello, As a Licensed Professional Engineer with experience in residential pool, spa, and hydraulic system design, I can prepare a complete, coordinated hydraulic and mechanical design package for your California infinity-edge pool and heated spa, suitable for contractor pricing, permit submission, and construction coordination. My approach begins with reviewing your architectural drawings, elevations, and equipment-room layout, followed by detailed hydraulic calculations for circulation, turnover, total dynamic head, surge tank capacity, pipe sizing, pump selection, heating, filtration, and spa jet performance. I will also develop the mechanical room layout, piping plans, P&ID, valve/control diagrams, equipment schedules, and coordinate the design with the architectural, structural, electrical, and landscape disciplines while addressing California pool safety requirements, including anti-entrapment protection and code compliance. Please share the architectural plans, site survey, pool elevations, and any preferred equipment manufacturers (Pentair, Jandy, Hayward, etc.), and I will review the project and provide a detailed execution plan and timeline. I look forward to collaborating on your project. Best regards John S.
$250 USD in 3 days
0.0
0.0

Hi there, Your infinity-edge pool and 4-person spa need a coordinated hydraulic design that balances overflow, TDH, jet performance, and serviceability. I’ve spent the last 4 years solving exactly this type of problem. I’ll review your drawings, calculate flow/turnover and surge-tank volume, size piping and pumps, develop spa jet/air and heating requirements, and produce a complete P&ID, valve logic, mechanical-room layout, and permit-ready CAD/PDF set. Deliverables: hydraulic calculations, equipment schedule, pipe-sizing schedule, operating diagrams, installation notes, and coordinated drawings suitable for contractor pricing. Best regards, Bryan
$250 USD in 2 days
0.0
0.0

Hi, there Your infinity-edge pool and 4-person heated spa need a hydraulic design that balances overflow, turnover, jet performance, and serviceability. I have spent the last 4 years solving exactly this type of problem, and I can start immediately. ✅Scope of work I will prepare a complete pool/spa mechanical package for California permitting: circulation and turnover calculations, TDH and pipe-sizing analysis, surge tank/catch basin sizing, equipment selection, valve sequencing, and a coordinated P&ID. I will also review the mechanical-room location and optimize layout for access, drainage, ventilation, and maintenance. ✅Deliverables - Hydraulic and heater sizing calculations - Infinity-edge overflow and surge volume calculations - Spa layout, jet count, air, suction, and return sizing - Equipment schedule and control logic - CAD/PDF drawings and editable calculation files - Installation notes suitable for contractor pricing and permit review I use AutoCAD and Excel-based hydraulic modeling to develop practical, buildable systems aligned with pool elevations and California standards. I also coordinate the design with structural, waterproofing, electrical, and pool construction documents to reduce RFIs and field conflicts. Best regards, Christopher
$250 USD in 2 days
0.0
0.0

With over a decade of experience in the mechanical engineering industry, my expertise aligns extremely well with your project needs. My past work includes numerous hydraulic and mechanical design projects for both residential and commercial pools and spas. Using advanced software like AutoCAD, Tekla, Rhino, and more, I am able to deliver highly detailed and accurate designs. I am well-versed in sizing and selecting pool equipment, calculating dynamic head and pressure losses, and designing complex piping systems. In short, if you choose me for this project you can expect a high level of professionalism blended with out-of-the-box problem-solving skills that match your specific needs. Don't take my word for it - let's have a conversation where we can discuss your project goals and how I can bring success to them through hydraulic engineering.
$258 USD in 1 day
0.0
0.0

Hello, I have experience preparing hydraulic and mechanical design packages for residential pools, heated spas, infinity-edge systems, equipment rooms, piping layouts, and coordinated CAD documentation. I am interested in this project because it requires a complete, buildable pool/spa system design with clear calculations, equipment sizing, safety provisions, and contractor-ready drawings. I will review the architectural plans, elevations, equipment-room location, and pool layout, then prepare flow, turnover, TDH, pipe sizing, pump, heater, surge tank, spa jet, air blower, valve/control, and equipment calculations. I will deliver CAD/PDF drawings, P&ID, mechanical-room layout, equipment schedule, installation notes, and editable Excel calculations using AutoCAD and Excel, with two revision rounds included. I do not personally hold California engineering licensure, but I work with licensed engineers who can review and provide signed or stamped results if required. Thanks for reading my proposal. Edwin
$500 USD in 7 days
0.0
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