It could be a faulty product, dirt stuck in the seal preventing it from closing, or other causes.

Hi Jason, thanks. Good Question, (Send me your contact details so I can send you some, I have put website links below to make contact)... It has been very difficult to get this product into the market, because we keep hitting brick walls. The large manufacturers like Kwikot and Cobra don't want to admit that they manufacture products that fail and the general population of plumbers seems to avoid surveys on this subject, because they don't want to admit that they have used Vacuum Breaker failure, diagnosing the leak as a "Burt Geyser" to sell their client a new one. Geyser replacement pays more than vacuum breaker replacement. To answer your question, I sell Vacucaps on all Geyser installations like I would a drip tray. The insulation and weather protection is just an added feature. (My colleague Dale in Johannesburg (Dale Simon Plumbers), also does the same thing. Dale designed the cap a few years ago believing that it is just as important as the drip tray on a geyser installation, but the industry is a difficult one. It seems like the big players in the industry have the regulators by the balls, so they have big influence over there. We can't get accurate data on actual vacuum breaker failure, because of the plumbers protecting their own fraudulent behaviour, so the data and support is just not there for resellers to show enough interest in the product. On the positive side, for everyone, there are definite benefits when it comes to insulation and weather protection on exterior installations, while still allowing the vacuum breaker to be fully functional. Woops maybe that's too much info... if you want to make contact to order a couple of Caps here we are: Cape Town: www.rootsplumbing.co.za Johannesburg: www.dsplumbers.co.za

No, they are meant for 2 different purposes. The one lets air in and the other lets air out. My question is, why would you want to use another type of valve, when this is what regulator specifies? I would just stick to the product designed for the job.

Thanks.... I'm not sure, but as I always say to this type of question, why would you want to use another type of valve, when this is what regulator specifies? I would just stick to the product designed for the job.