We have a 30-day return policy, which means you have 30 days after receiving your item to request a return. To be eligible for a return, your item must be in the same condition that you received it, unworn or unused, with tags, and in its original packaging. You’ll also need the receipt or proof of purchase. To start a return, you can contact us at info@masterbuildermercantile.com. If your return is accepted, we’ll send you a return shipping label, as well as instructions on how and where to send your package. Items sent back to us without first requesting a return will not be accepted. You can always contact us for any return question at: info@masterbuildermercantile.com.

“As a builder, if the home owner is looking to put either electric or hydronic floor heating in their home, we always turn to Floor Heat Australia. Their products are Continue Reading

“We had a Devex electric floor heating system installed in our bathroom and couldn’t be happier with the end result. It is very easy to control the system with our Continue Reading

The quality and precision of our products is second to none. Find out more about the difference by discovering all our products.

Personalised care from our staff from early design stages through to the completion of your installation, to the set up of your thermostat.

With over 60,000 installations in Sydney alone, we now manufacture our own line of high-quality electric underfloor heating cables, mats, thermostats and gas boilers for hydronic floor heating.

Exchanges The fastest way to ensure you get what you want is to return the item you have, and once the return is accepted, make a separate purchase for the new item.

Refunds We will notify you once we’ve received and inspected your return, and let you know if the refund was approved or not. If approved, you’ll be automatically refunded on your original payment method. Please remember it can take some time for your bank or credit card company to process and post the refund too.

“Just a note to say what a great tradesman you have on your team. Very efficient, clean and tidy and a nice bloke. Hard to find them like that anymore.”

This 1-1/4 inch 009 reduced pressure zone backflow preventer assembly is designed to prevent the backflow of polluted water from entering into the potable water supply due to backsiphonage and or backpressure in accordance with national plumbing codes and water authority requirements. Its compact modular design facilitates easy maintenance with a single access cover for in-line repairs. It is ideal for protection in continuous pressure piping applications and at cross-connections identified as health hazards and for contaminants at the service line entrance. This assembly consists of a bronze body construction, NPT end connections, quarter turn ball valve shutoffs, top mounted test cocks, two in-line independent positive seating check modules, captured springs, and replaceable check discs and seats.

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A Big Thank you to Devex and the amazing Underfloor heating we have had installed! Throughout our massive renovations at home, Devex have been by far the easiest to deal Continue Reading

“I have worked with Devex Systems/Floor Heat Australia on a number of jobs, most recently at Palm Beach and Mosman. I continue to use them regularly because I’m provided with Continue Reading

Damages and issues Please inspect your order upon reception and contact us immediately if the item is defective, damaged or if you receive the wrong item, so that we can evaluate the issue and make it right.

Experienced, resourceful and objective advice, been through multiple business for in ground floor heating, they offer the best solution and the most reasonable quotation. Highly recommend. Thank you once again Continue Reading

Exceptions / non-returnable items Certain types of items cannot be returned, like perishable goods, and custom products (such as special orders or personalized items). We also do not accept returns for hazardous materials, flammable liquids, or gases. Please get in touch if you have questions or concerns about your specific item. Unfortunately, we cannot accept returns on sale items or gift cards.

I offer you an unconditional endorsement of Devex and the Heated floor that I have in my bathroom. Not only do I enjoy the heated floor, but the after care, Continue Reading

Leading Australian company for under floor heating products and installations with 40 years of experience supplying comfort to Australian families.

Service from Nick (Melbourne) has been excellent - readily contactable, prompt responses, clear advice and excellent sales process and follow up. Haven't used the product yet but the ordering and Continue Reading

Fantastic product and service. I have used these guys for 2 houses. Probably used all varieties of underfloor heating and thermostats. In bathrooms and living areas. Always been very happy. Continue Reading

I highly recommend this business. From the first phone contact, they were outstanding. They had records or our original underfloor installation 18 years ago and were able to quickly diagnose Continue Reading