Great swing valve for the money By Louis on 8/10/2012
Louis would recommend this product to a friend
No check valve is 100% safe in your aquarium so be prepared for future issues if you are only relying on this as your main source of stopping water.
That being said this true union is great. Decently priced. Easily taken apart for cleaning and inspections, and the clear plastic helps to see issues before they occur and no metal springs to corrode or fail from salt.
Great price for a true union check valve By Bill on 5/29/2012
Bill would recommend this product to a friend
Be sure to design your sump to handle all back flow because checkvalves are not good insurance for flod control. They seep water slowly and in a long term power outage it will flood if your sump isn't large enough. This product does work as good as any check valve but I don't feel any of them can be relied on to stop a flood.
Works as promised By Steve on 3/7/2012
Steve would recommend this product to a friend
A valve isn't necessarily the most glamorous piece of equipment we rely on for proper operation and failure preparedness - but important nonetheless. These valves work every time and provide just a little extra peace of mind that you don't come home to wet floors! Would recommend.
Peace of mind By Fawn on 2/12/2012
Fawn would recommend this product to a friend
Affordable, and so far has worked flawlessly. Everyone should have one of these on your sump return pipe. Simple to install and its nice to be able to view the inside of it through the clear pvc.
it is better to be safe then sorry By Chris on 11/22/2010
Chris would recommend this product to a friend
they work great you can't go wrong and is easy to clean.you can see in them to make sure that everything is working right.
Good value on a double union check valve. By Mr. Biggs on 12/16/2009
Mr. Biggs would recommend this product to a friend
Does what it was made to do prevent the back flow of water.
The unions make it handy for cleaning and replacement when it fails.
All check valves are subject to failure in the long run.
I would not depend on a check valve to prevent the draining of the main tank into your sump to prevent flooding. Design the sump to hold all the water that will drain from the main tank during pump or power failure.
This valve is a good value and I would recommend it to others when used in the right situation.