https://www.backflowprevention.co.nz/home daily 1.0 2026-01-19 https://www.backflowprevention.co.nz/useful-downloads daily 0.75 2025-07-23 https://www.backflowprevention.co.nz/about-us daily 0.75 2025-09-28 https://images.squarespace-cdn.com/content/v1/5dead6d381534b524787efe5/1575677048743-C8HD1QVDESDM5SS8HSI5/NZBFP_Jon.jpg About Us - Hi , I’m Jon Lewis. About Me I’m a specialist in water protection with a focus on cross-connection control surveying and backflow prevention device installation, testing, and maintenance. Since 2014, through Backflow Prevention Ltd, I’ve dedicated my work to education, surveying, and auditing backflow prevention programmes across New Zealand. My priority is ensuring that the potable water supply — from the source to the last flowing tap — remains safe and free from contamination. With many years of hands-on experience, I can help you protect water services both inside and outside the property boundary. Professional Roles & Affiliations · Member, New Zealand Master Plumbers Inc. · Industry Representative, Standards Australia Committee WS-023, focused on AS/NZS 2843 Backflow Prevention · Specialist Course Presenter, WSP Environmental, delivering NZQA Unit Standards 23848 (Testing) and 23847 (Installation) in backflow prevention What I Do · Backflow prevention training (NZQA-recognised) · Cross-connection control surveying · Auditing and programme compliance for water suppliers and networks I’m passionate about passing on the knowledge I’ve built over decades in the trade and helping others meet compliance requirements while protecting public health. If you want to know more about backflow prevention, cross-connection control surveys, or network audits, get in touch — I’m always keen to help. https://www.backflowprevention.co.nz/contact-us daily 0.75 2023-04-05 https://www.backflowprevention.co.nz/services daily 0.75 2025-09-28 https://images.squarespace-cdn.com/content/v1/5dead6d381534b524787efe5/6611359d-ad26-408a-aaf6-7b34f4a6b45d/IMG_2717.jpeg Services - Consulting & Surveying Cross-Connection Control Survey When you’re unsure about the best way forward — whether protecting your potable water supply network (outside the boundary) or your internal water system (inside the boundary) — we’re here to help. We’ll work with you to develop a cross-connection control programme, which may include: · Detailed property surveys for internal potable water protection · Practical advice on system design · Guidance on the correct backflow prevention devices required Our site survey work helps you identify hazards and make informed decisions. From the boundary to the source, we ensure the right backflow prevention devices are installed where they’re needed most — whether at the property boundary or within the system itself. If you’re unsure, just give us a call — we’ll guide you through the process. https://images.squarespace-cdn.com/content/v1/5dead6d381534b524787efe5/19360c82-dde9-401d-9047-d52a562a5c6f/IMG_3039.jpeg Services - Training & Tutoring Backflow Prevention Training with WSP Environmental For many years, Jon has been the training facilitator for WSP Environmental, delivering the Backflow Prevention Unit Standards US23847 and US23848. This four-day course covers both the theory and practical requirements for the installation, testing, and servicing of backflow prevention devices. Course Delivery · WSP runs courses at venues throughout New Zealand — check their website for upcoming dates. · If you have enough participants, WSP can deliver a course directly in your region. Refresher Courses If you only need a refresher, a one-day course is available. These refresher courses are linked to the full backflow prevention programme and cover any updates to theory or practical testing methods. Note: You must have previously completed US23847 and US23848 to attend a refresher course. https://nzetc.wsp.com/w/courses/362-backflow-prevention-2023 https://images.squarespace-cdn.com/content/v1/5dead6d381534b524787efe5/1576197241203-Q7OXZO5UYNLQVOFHLBNQ/Auditing.jpg Services - Backflow Installation Auditing Part of undertaking a complete cross connection control backflow prevention program is having an independent audit. We can audit your backflow program to ensure you are getting the best protection for your water supply network. Generally this will require an independent audit of your backflow prevention testing program to ensure the people you are relying on to undertake the testing and maintenance of the boundary backflow prevention devices are meeting specific standards that you set out. This may include but is not limited to, health and safety, testing procedures, public consultation, suitability of practice, Accuracy, timeliness and suitability of testers. https://images.squarespace-cdn.com/content/v1/5dead6d381534b524787efe5/1576198082957-ATKKHUYXMXK64ICECKTN/Manufacture.jpg Services - Manufacture to Order We have previously manufactured Backflow Prevention units, pre-assembled to your requirements. We do not offer this service anymore. There is a failing in the industry to consider long term consequences of poor backflow device installations. If you are having issues around installation requirements we are happy to help solve your problems.