Backflow Prevention Assoc. Aust

This blog is a platform for the BPAA members and other interested parties to share their challenges and successes that improve the Backflow Prevention sector.

Response to Question

Plumbing and Drainage Act 2018 (PDA);

Section 64; Complying with code requirements for plumbing and drainage work

(1) A person who carries out plumbing or drainage work must ensure the work complies with the code requirements for the work.

Maximum penalty—100 penalty units. Penalty Infringement Notice $1334.00

Plumbing Code of Australia (PCA);

BS5.1.3 Protection types and Hazard Ratings

Cross-connection hazards within the site must be rated in accordance with—

The following are High Hazard for the purpose of individual protection:

 (ii)Bidets and douche hoses.



12.2.1 Bidet

A bidet SHALL be installed with a registered break tank or a testable device conforming to AS/NZS 2845.1 or AS 2845.2.

12.2.2 Bidette

A bidette SHALL be installed with a non-testable device of 25mm air gap.

12.2.3 Toilet seat douches

Where the douche outlet, in all positions, is at least 25mm above the overflow level of the pan, backflow prevention is not required.

Where the douche outlet, in any position, is less that 25mm above the overflow of the pan, a high-hazard backflow prevention device, conforming to AS/NZS 2845.1 or AS 2845.2 shall be installed.


Section 8.3 Backflow prevention

The douche seat shall be supplied with a low hazard mechanical backflow prevention device complying with AS/NZS2854.1

Therefore; when installing a bidet or bidet seat the plumber MUST ensure he or she complies with the section 64 of the PDA, section BS5.1.3 of the PCA and the deemed to satisfy provisions of section 12 of the AS/NZS35001.2018.

March 30th 2020

Hello All

Wanting some clarification please as I’m getting mixed messages

What is everyone’s view on connecting these bolt on Bidet seats from the Bidet Shop

Do they have to be installed downstream of an RPZ ???

Thanks in advance


Rob Brouwers

Backflow Plumbing Services P/L

March 30th 2020
<p>Can anyone tell me what is wrong in this picture?</p>

Can anyone tell me what is wrong in this picture?

March 27th 2020


This is a great opportunity to send in some photos.  We would like to see examples of great work and some not so great work.  You can attach photos to your post.  Give the BPAA a call if you have any problems submitting a post.  Thanks. 

March 27th 2020
tumblr photo
March 26th 2020




Well here we go.  The Backflow Prevention Association of Australia is looking for more ways to reach our members and the rest of you out their in the Backflow world.  We think we have the ability to make a difference but we need your help.  This Blog is your opportunity to raise issues, tell stories (good and bad), send photos and generally, put things on the Agenda.  If its worth talking about why not talk about it here.  

WOW!  I have just got on board and ready to go, how about all you BPAA Members get on board and start posting your question or suggestion, even just the Good Bad and Ugly Backflow Pics

March 26th 2020
(This will take you to the BPAA Tumblr page which is our preferred option.  If you do not have a Tumblr account you will be required to sign up.)


Comment here