NTEC Australia Pty Ltd
PO Box 3062
Newport, Victoria 3015

Email: info@valvecosy.com.au

Do NOT contact us offering SEO or web design services.

Valvecosy™ is subject to patent and registered design applications in Australia.

Australian Patent No. 2008226325

NTEC Australia Pty. Ltd, reserves the right to modify the designs and specifications and to withdraw and introduce products at any time without notice.

© 2016 NTEC Australia Pty. Ltd. All rights reserved.
® Registered trademark of NTEC Australia Pty. Ltd.
™ Trademark of NTEC Australia Pty. Ltd.

Made in Australia by NTEC Australia Pty. Ltd.
A.B.N. 39 082 723 707


Valvecosy™ saves you money by reducing heat loss and conserving energy. Extensive tests and thermographic images showing heat radiation - before and after Valvecosy™ - demonstrate its effectiveness.

Tests and Thermographic images

Your hot water service is one of the biggest consumers of energy in the household (see: YourHome - Hot Water Service).

Determining the heat loss from your hot water tank pressure and relief valve is quite complex. Temperature, humidity, wind speed, solar aspect, tank design and location all affect how much heat is lost. As these variables change over the year and therefore so does the amount of heat lost.

A technical study "improving on Electric Water Heater Efficiency for the Australian Greenhouse Office" [1] said the temperature and relief valve is responsible for 6.5% of the heat loss from hot water system. However you don't live in a laboratory or a computer simulation, right?

So we've done real world testing in a typical domestic environment in Melbourne and compared two identical hot water services to see how Valvecosy™ performs. Firstly, we found that there's no such thing as identical hot water services. And even with two identical models, manufacturing tolerance means that the heat loss is different between tanks. However, the difference is measurable and can be accounted for. We conducted tests to measure standby losses on side-by-side tanks situated outdoors in Melbourne with and without Valvecosy™.


Left: without Valvecosy (R). Right: with Valvecosy (R)


The effectiveness of Valvecosy™ is illustrated by thermal images taken during our testing. The bright oranges and reds show heat loss. The figure on the left shows an uninsulated valve. It's pretty clear that without Valvecosy™ a pressure and temperature relief valves loses plenty of heat. The figure on the right shows a tank with Valvecosy™. We've given it plenty of time to warm up but there's a dramatic reduction in heat loss.

Our test results have found that a hot water service fitted with Valvecosy™ can save up to ~55kWhr of electricity per year.

Multiply 55 by the amount you pay per kW for electricity and you'll see that Valvecosy™ quickly pays for itself and makes you money over its life span.

As noted above many variables influence the amount of heat lost from a pressure and temperature relief valve so you may experience different savings at your location.


Note 1: Table 6 / [Technical Study on Improving on Electric Water Heater Efficiency]

EP et al (2000) Technical Study on Improving on Electric Water Heater Efficiency. Energy Partners in associations with Sustainable Solutions Pty Ltd and the University of New South Wales, for the Australian Greenhouse Office, May 2000.

Download technical study [PDF, 491KB]