ALT Item for Pinch-type checkvalve
ALT Item for Pinch-type checkvalve
(OP)
I'm in the process of specifying a checkvalve for a storm drain that will connect to a sanitary sewer..the storm drain is a trench drain inside a industrial-type garage and is fitted with an oil-water seperater...
I'm concerned with backflows of liquids and gas originating from the sanitary sewer. I've found a checkvalve that can do the job; its a pinch-type valve by Tideflex and seems to be a good product, yet a bit pricey.
Any recommendation for any alternates that may be cheaper?
Thanks for reading,
H.
I'm concerned with backflows of liquids and gas originating from the sanitary sewer. I've found a checkvalve that can do the job; its a pinch-type valve by Tideflex and seems to be a good product, yet a bit pricey.
Any recommendation for any alternates that may be cheaper?
Thanks for reading,
H.





RE: ALT Item for Pinch-type checkvalve
"checkvalve for a storm drain that will connect to a sanitary sewer". I am sure you know that storm sewers do not connect to sanitary sewers.
In regards to the check valve, it is very unlikely that a check valve can be made to work reliably in a sanitary sewer. The amount of head available with a gravity flow sewer system is not likely to reliable close any type of check valve. You also have to worry about solids that will jam the check valve.
If you are concerned about sewer gases, use a water seal to prevent gases from coming through the sewer.
If you are concerned about sewer back-up, look into an "overhead" or pumped sewer. An "overhead" sewer can be designed very easily and it will be more reliable than depending on a sewer backup prevention device.
RE: ALT Item for Pinch-type checkvalve
Steve Wagner
RE: ALT Item for Pinch-type checkvalve
Of course, they represented the product.
RE: ALT Item for Pinch-type checkvalve
cheers,
h.
RE: ALT Item for Pinch-type checkvalve
Such connections usually require at least a gas trap ( goose neck is the slang term). If the floor elevation is below the manhole rim elevation outside the garage then the plumbing code requires a backwater valve, regardless of the cost.
good luck
RE: ALT Item for Pinch-type checkvalve
Jon
RE: ALT Item for Pinch-type checkvalve
The price of an article is soon forgotten when it doesnt work. Tideflex works. I have tried all manner of devices, none compare with the reliability of this device for this application.
Have you considered the risks & cost of failure?
RE: ALT Item for Pinch-type checkvalve
In this case, the wash water HAS to go to the sewer system. They usually end up pre-treating for oil and/or any other goodies the Utility wants them to take out.
We did evaluate using www.redvalve.com vs a small fiberglass wetwell pump system. In the end, we had to rule out the pinch valve as we didn't feel there was sufficient vertical drop to the nearest manhole, which was partially a function of how much pressure we felt was required to open those pinch valves with sufficient safety factor.