Backflow prevention starts within a property boundary by isolating a possible contamination source from the town mains or storage tanks (rainwater tanks) from the tap or appliance.

This is prevented by installing a backflow prevention device such as a one-way valve which prevents the contaminants from entering the drinking water supply.  These are available in testable and non-testable types depending on the risk associated with the possible contamination.  Testable devices require annual testing to ensure satisfactory operation.

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.

Street Address l Ground Floor - 1 Nicholas Street, IpswichPostal Address l Plumbing Section - PO Box 191, Ipswich QLD 4305 Australia.

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.

Backflow prevention is the term used to prevent the reverse flow of water from a potentially polluted or contaminated source into the reticulated water supply.

Backflow is caused by cross connection.  This is any point on a water system where a polluting substance may come in contact with drinking water.  This may include any piping system that allows access to the drinking water supply.

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.

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.

A buried or partially buried rainwater tank requires a testable backflow prevention device to comply with the Australian Standard.

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

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.