Check this out: Free and online plumbing courses with certificate.

Yeah, sounds wild, but there are some international platforms out there crushing it in plumbing training.

All for free — and they even give you a digital certificate at the end (something to show off to your friends or flex on LinkedIn).

It’s like taking a course straight from your couch, at your own pace, no fluff.
And the coolest part? These are 100% legit, no piracy, no credit card needed — just grab the link and go.

Wanna learn how to install pipes, change faucets, fix leaks, or even design a badass plumbing system for a building?
These four courses I handpicked are perfect if you’re looking to learn the right way and earn a certified credential from abroad.

And even if your English isn’t fluent — don’t worry. They’ve got subtitles, videos, texts, illustrations… totally doable to follow.

So get ready: the keyword Free and online plumbing courses with certificate is gonna pop up a few times, but always in style — no annoying repetition, just smooth flow for a top-ranked read.

4th Course: Alison – Diploma in Plumbing Studies

This one’s a classic! Alison offers a course called Diploma in Plumbing Studies, totally free with a digital certificate (you can even download a PDF diploma or get a printed one if you want).

They cover everything from the history of plumbing to copper piping, leak prevention, reading plumbing blueprints, and safety regulations.

The course is 100% online, with about 6 to 10 hours of video and written content, plus quizzes to make sure you’re keeping up.

And the certificate? It’s digital — you get the PDF right after completing the final assessment. If you want a printed diploma, there’s a small fee, but you can totally go full free without issues.

It’s super intuitive — just click the module, watch, answer questions, and move forward.

To start, register for free, search for “Diploma in Plumbing Studies”, hit play, and boom — you’re in.
You can easily fit this into your schedule — study at your own pace, no stress.

It’s all in English, but clearly explained — great for anyone ready to level up in plumbing while practicing the language.

This course fits perfectly into the category of Free and online plumbing courses with certificate, offering solid foundational knowledge in plumbing systems.

3rd Course: SkillCat – Online Plumbing Training & Certifications

If you want a hands-on, U.S.-market-focused course, SkillCat is top-tier.
They offer over 300 hours of training with simulations, and you can start for free.
If you pay later, you unlock more advanced certifications.

Here’s what’s awesome: they’ve got modules on blueprint reading, pipe installation, soldering, safety, and even licensing exam prep.

There are interactive simulations, quizzes, and a learning path — it’s like a gamified training system. You click, complete, and learn through experience.

To begin: create an account, activate the free trial, browse the “Plumbing Fundamentals” modules, and start learning.
If you want the certificate later, there’s a fee — but there’s plenty of free learning available during the trial.

The platform is sleek, modern, and works great on both phone and PC.

It’s a strong contender in the Free and online plumbing courses with certificate category because it combines theory, practice, interactivity, and a chance to earn real U.S. credentials.

2nd Course: PHCC via Granite State Trade School – Plumbing Pre-Apprenticeship

The PHCC (Plumbing-Heating-Cooling Contractors Association) is well-known in the U.S., and they teamed up with Granite State Trade School to offer a free pre-apprenticeship program.

The course covers plumbing basics: math, blueprint reading, DWV systems (Drain-Waste-Vent), piping, safety, and common service processes.
It’s a great starting point for aspiring apprentices. There are mentorships (including online via Zoom), materials, and access to a professional community.

How it works: go to the site, register for the PHCC Academy Pre-Apprenticeship Program, and gain access to all online content.
You’ll also be invited to live or virtual mentoring sessions (live ones are in NH, USA), but you can watch recordings too.

This one definitely belongs in the Free and online plumbing courses with certificate list because it’s official, internationally recognized, and bridges theory and real-world training, helping you get a foot in the door in the U.S. job market.

1st Course: Watts – Watts Works Online Training

Last but not least, we’ve got something straight-up practical: Watts, a major U.S. brand, offers free modules on plumbing, leak detection, flow control, and heating systems.

Each module is short — just 7 minutes — with topics like “Leak Defense”, “Drains”, “Flow Control”, and “Hot Water Systems”.

You log in, pick the module you’re into, watch the explainer video, take a quick quiz, and earn tokens — which you can exchange for rewards! There are digital certificates (CEUs or token-based).

It’s fast, efficient, and ideal if you want to learn specific plumbing skills without wasting time.
The layout is clean, easy to navigate, and works smoothly on your phone — perfect for squeezing in a lesson during a break.

This is a great pick for the Free and online plumbing courses with certificate category, especially for those who want practical skills in quick bursts.

Registration Links

Alison – Diploma in Plumbing Studies
👉 Sign up at Alison.com and search for “Diploma in Plumbing Studies”

SkillCat – Online Plumbing Training & Certifications
👉 Go to SkillCatApp.com, create an account, and start the free trial

PHCC Pre-Apprenticeship (via Granite State Trade School)
👉 Register at phccacademy.org to access the free plumbing program

Watts Works Online Training
👉 Visit training.watts.com, create an account, and complete free modules like “Leak Defense”