Update: Hydra-Stop IV 250 Insta-Valve Update
In 2014 Hydra-Stop re-engineered the 4″ – 8″ insertion valve sizes to provide the higher pressure rating of 250 psi and more reliable and consistent closures. Between 2014 and 2015, we installed 182 insertion valves (primarily 6″ and 8″ in size) of the new model, and experienced problems with 12 of these valves that included poor closures due to tubercolation in the pipe and the inability to re-open the valves with 0 pressure on one side and full pressure on the other side of the valve. As usual, South Shore Pipeline strives for near perfection. Hydra-Stop worked on these issues and we can now say that the 4″ – 8″ size range is very good and we do not hesitate to recommend it to our Clients.
In late 2016, Hydra-Stop came out with the re-engineered version of the 10″ and 12″ size ranges. We have installed several of these and although they do offer superior shutdown capability, they are extremely difficult to re-open under unequal pressure. The factory is working to correct this issue.
Hydra-Stop Insta-Valves Product Review
We’ve installed Hydra-Stop Insta-Valves for almost 15 years, and as with any new product, there was a learning curve. When the valve initially came on the market, it was what I would term a ‘throw-a-way’ valve or a ‘2-turn’ valve. It’s main application in the North East was to provide isolation on hydrant branches where there was none so as to facilitate hydrant replacement programs. Iit served this purpose but in the late 90’s, I did not recommend it for any long-term purpose.
From 2000 through 2005, we ceased installing this product for long-term use because of inherent problems with the valve design. However, improvements were made based upon recommendations of those installing and using these valves, and, at this time, I can honestly say I am pleased with the operation and performance of this product.