
The Brasshards 20mm Brass Threaded Back Nut is a WaterMark approved fitting for fastening brass fittings and pipes, made from dezincified (DR) brass to deliver safe, durable performance in water supply systems.
This 20mm back nut is used to lock and secure threaded brass fittings and pipes in residential and commercial plumbing. The DR brass is engineered to resist corrosion and dezincification for a long service life, and as a WaterMark approved fitting compliant with AS3688 it suits potable water supply work where a reliable, code-compliant connection is required.
Brasshards 20mm Brass Threaded Back Nut is a durable fastening solution designed for brass fittings and pipes, ensuring compliance with Australian standards. It is constructed from high-quality dezincified (DR) brass, making it suitable for residential and commercial applications. The fitting is WaterMark approved and compliant with AS3688 for water supply use, and the DR brass is engineered to resist corrosion.
It is a 20mm fitting.
It is made from dezincified (DR) brass for corrosion resistance.
Yes, it is WaterMark approved and compliant with AS3688 for water supply systems.
It secures and fastens threaded brass fittings and pipes.
Great value for money
Spent a while looking for the right Brasshards 20mm and this kept coming up as the best value. I can see why — quality is impressive for the price. Delivery took just 2 days to Townsville which is great. Packaging was solid and everything intact. My partner and I both use it daily now. Highly recommended.
One of my best online buys
Quality product at a fair price. Delivered quickly. Happy.
Happy with SuperSaver AU
Have bought Brasshards before and always been happy. Great price on SuperSaver AU and delivery was fast. Arrived perfectly packaged. Works flawlessly from day one.
Fast delivery and perfect condition
Fast delivery and exactly what I ordered. Very happy with this.
Outstanding value
Bought this on a bit of an impulse after seeing it on the site and really glad I did. Quality is much better than the price suggests — feels premium and well made. Ordered Monday and it arrived Wednesday in Sydney. Nothing loose or damaged. A few people have asked where I got it.
Good buy — fast shipping
Really good value — compared it to similar products at twice the price and there is very little difference in quality. Fast shipping and arrived in perfect condition.

