How Plumbing Engineers Benefit from CAD Drafting and Design Services

It’s hard to believe that a plumbing project isn’t always about someone installing, repairing, or replacing broken pipes and leaky faucets. Much of it is indeed all of those, but it also involves a slightly more complicated design phase, best left to an engineering design expert rather than an actual plumber. For the uninitiated, a plumbing engineer designs the entire system and prepares the plan, whereas a plumber executes it. Because most engineers like to think their work is so difficult, they often tap a professional drafting service to draw the plan for them.

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They get back more than they give

In a good way, of course. In an ideal world, an engineer designs the system and translates it into a technical drawing for a construction permit and approval. But sometimes the world isn’t as ideal as what everybody has in mind, and an engineer doesn’t have the luxury of time to produce a detailed draft. Perhaps there is just so much engineering work to do that outsourcing the drafting makes a lot more sense and is more time-efficient. The engineer makes sketches or low-detail presentations that are not to scale, with notes and scribbles all over them. And then the engineer gives the sketches to a drafter to convert into a technical drawing for construction. To put it simply, the engineer decides what to draw, and the drafter makes the drawing.

Because professional drafters specialize in the trade, they can do it quickly and at a lower hourly rate than an engineer. Take, for example, the drafters at Cad Crowd. Thousands upon thousands of CAD experts at Cad Crowd offer a broad range of drafting services at affordable rates, backed by the platform’s accuracy guarantee. Cad Crowd is one of the few freelancing sites on the web to place heavy emphasis on the AEC industry, including the MEP (Mechanical, Electrical, and Plumbing) sector, with more than 15 years of experience in outsourcing. Apart from this cost-saving advantage, engineers can reap a lot more benefits from collaborating with CAD drafting and design services.

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Let’s not eyeball it, shall we?

Eyeballing is probably just fine when you’re repairing a P-trap or tinkering with a water pressure valve, but not for an engineer designing an entire plumbing system.

Back in the old days, when CAD design services weren’t yet mainstream, or affordable for that matter, manual drafting on paper and boards reigned supreme. What is now a rather tidy task of technical drawing on a computer used to be a bungled, cluttered affair full of sweaty-hand smudges. And if an engineer was working overtime past midnight, coffee spills and dull pencils could make an otherwise sharp mind into, well, a dull one. In cases where the plumbing design was extensive enough, it might take an additional two or three drafters with varying degrees of skills and experience to work on a single plan. On one of those days, somebody was bound to not care enough about accuracy and just wanted to go home early and watch TV in black and white.

As a result, the term “precision” came only second after “completion” on many projects. When a line was off by even a fraction of a millimeter on a 1:200-scale draft, construction headaches ensued. You’re talking about misaligned pipe connections, incorrectly sized fittings, inaccessible valves, and a whole bunch of on-site adjustments by a plumber who then eyeballed things.

CAD drafting for a plumbing system means creating the plumbing plan on a computer, with a lot of help from the automation the machine offers. Think of it as a visual calculator that lets you specify the dimensions and tolerances of every component, down to the hundredth of a millimeter. Such accuracy ensures you’ll always generate the correct plan, no matter how complex the project is. The BOM (Bill of Materials) is always spot-on. And when the parts arrive at the jobsite, they actually play nice with each other. For plumbers, the CAD drawing also serves as an instruction manual, so no eyeballing is required.

Just maybe, time is indeed money

Drawing on a computer might seem daunting. You don’t have to sharpen a pencil in the process now and then. Still, it’s hard to imagine making precise movements while holding that mouse button to draw a perfect representation of a curvy water closet, sink, or bathtub. You don’t have to imagine that at all, really. It is, in fact, very hard. That’s why just about every architectural CAD software offers a broad range of templates ready to click and place on the screen. 

These ready-made templates may include a wide variety of fixtures and fittings, including end-of-the-line cleanouts, routing options for elevation mismatches, pipe specifications, automatic annotation for multiple pipe runs, and more, done by engineering design services. Almost all of them are delivered via a simple drag-and-drop interface in the software. This makes the drawing of every plumbing part and component quick and practical, with very little chance of mistakes, unless a careless drafter is involved. 

If a project involves drawing plumbing plans for dozens of individual bathrooms, such as in a residential building with pretty much identical units, a drafter can create “modules” or “blocks” on the CAD software. A block is essentially a group of plumbing parts, including fixtures and piping configurations, treated as a single assembly. It doesn’t matter if the building has 50 or 500 units; copy-and-paste does all the heavy lifting. Furthermore, an update or modification on the master block is reflected on every other drawing in an instant.

Drafting a plumbing system often involves quite a lot of repetition, and that’s to be expected because much of the drawing includes the same pipes connected with the same fittings over and over again until it gets to the very end of the line. When a repetitive task is simplified or outsourced to a professional drafting service, a plumbing engineer can focus on more pressing matters, such as maintaining consistent water pressure, sustainability, and the ergonomics of the water closet. Because the drawing happens in the background with CAD, the design phase runs quicker than ever before, and the payday comes sooner, too.

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Gone is the eraser dust

Some clients are difficult to work with. They demand changes after changes to an already-approved plan, prompting the engineer to make revisions that never seem to please them. Sometimes the kitchen layout isn’t sophisticated enough, the bathroom design is too mainstream, or there aren’t enough sinks in the house. Clients are the project owners after all, so no engineer can blame them as long as they have the money to pay for the services. A plumbing engineer can only comply and produce a new plan for every change in design.

The good thing is that a CAD drafting expert makes revisions simple. Since the original plumbing plan was created in CAD, making changes to the image is simply a matter of moving things around on a screen. A drafter can move, stretch, and replace fixtures, or perhaps reroute the entire pipeline without even touching an eraser. Everything is done on screen in a virtual environment. Apart from that, the real benefit here is version control, or a file history if you like. If a client asks why there are now four sinks in the house rather than five, the plumbing engineer can refer back to the previous draft to see how forgetful the client is.

Quick math and no headache

We’re not saying that an engineer or a drafting service can’t do math without a headache. It’s just that there will be much less headache in case it does happen while calculating flow demand, pipe sizing, slope, and pressure drop. Modern CAD software does all the calculations automatically. For example, it can determine the pressure drop along a 50-foot stretch of copper pipe with many fixture branches attached. If you aim for a specific flow rate measured in GPM (gallons per minute), CAD tools can give you the right pipe sizes based on the number of fixtures to be installed.

Some automation features require specialized toolsets, for example, AutoCAD MEP, AutoCAD Plant 3D, or Revit. But don’t worry, all professional drafters know that plumbing engineers have a tender spot in their hearts for software with long names, so they will happily purchase and use the tools to indulge the clients. CAD tools are very good at math, even better than Sheldon Cooper, allowing the engineers to have their brainpower occupied by other important issues, presumably.

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We haven’t even talked about 3D CAD.

No one says CAD drafting and design have to be in the conventional 2D format. The aforementioned software, such as Autodesk Revit and AutoCAD MEP, generates 3D drafts. Other options include PractiPIPE, Bentley AutoPLANT, PlumbingCAD, etc. While the 3D image might not be photorealistic, it’s good enough to provide spatial awareness as if you’re looking at the pipeline through the floor, ceiling, and walls.

Engineers don’t need 3D plumbing drafts to understand the design. They’re trained to develop a cognitive ability to translate flat lines, shapes, and symbols into a clear vision of an architectural design. But the average clients, on the other hand? Not so much. Most clients find 2D drafts confusing, like reading a text from a language they don’t understand. They may nod many times as they stare at the image, but only to look smart in front of everyone. Thanks to 3D CAD, plumbing engineering experts can more easily explain how things work, even to the most uninformed clients. 

And let’s not forget BIM (Building Information Modeling), currently touted as the biggest thing to ever happen to the architectural industry. Some would go so far as to describe it as the be-all and end-all drafting software tool, flooded with features such as automatic clash detection, cost estimation, Bill of Materials generation, cloud-based collaboration, and, essentially, data-rich visualization.

Takeaway

The bottom line is that plumbing engineers can always work smarter, not harder. One of the smartest things a plumbing engineer can do is to work with or hire a CAD drafting service to translate the design intent into a technical drawing. Just “knowing” that a professional is taking care of the task can give the much-needed peace of mind to focus on the actual engineering parts of the job, be it cost efficiency, construction methods, rainwater harvesting, or code compliance.

Whether you need the plumbing plan in the conventional 2D format or the more advanced 3D visualization, there is always the right professional at Cad Crowd to get the work done. All drafters at Cad Crowd have been vetted and screened for their CAD proficiency and experience in architectural projects to ensure that every client works with the most qualified talent. Request a quote today.