Is there a backflow prevention valve?
996081
No. A backflow prevention device can be added, the cost is $33.04 and is available at Home Depot, Lowes, etc. . http://www.homedepot.com/p/KOHLER-1-2-in-x-1-2-in-Vacuum-Breaker-K-9660-CP/100066985?keyword=kohler+9660+cp As you can tell from the price, this is why they are not included---its more than the bidet.
1600624
It has no back flow prevention that stops water in the drain from being sucked into the RO system. Depending on your installation, an air gap is sometimes recommended.
515041
Dear Kathryn,As long as the variation is within 20 PSI, you should be ok. Also do you have a backflow preventer installed. If not, please do. we do sell Backflow preventers as well so let us know if you want any recommendations.Also you should consult with a certified installer/professional in your region just to be on the safe side.David
1527888
It does have a backflow preventer.Am not familiar with CSA markings or where it would be located. Mine was purchased for residential use.
915700
Not sure if your manucapility requires a backflow prevention device but I decided not to have one installed on mine so as to not cause a reduction in water pressure (which can be 10% or more). It works just fine. Not sure how the water supply can get continimated when the pump is off (which is it is most of the time).
1035444
The valve that you need is sold by Grundfos. You can buy as many separate valves as you need.
1412698
Look like you already got a couple of answers and I agree with them. This just connects as part of the hose to give you backflow protection but the threads are all the same as the hose threads.
1570692
I experienced a significant reduction in water pressure - enough that my sprinklers won't work properly with the device connected. I had to disconnect it. I keep looking for someone to manufacture a "full-flow" backflow valve that will not reduce water pressure, but I haven't found it yet...
174631
Yes, if you look in the zoomed picture you can see the black thing with the white line, that is the control/flow valve that allows to adjust the drip.
845464
The purpose of the valve is to prevent back flow into the house...it is a one way valve so it cannot have flow in both directions.
205375
I don't use one. I just attach the hoses to the unit and set the timers. Have not had a back flow issue. Hope this helps you.
2133025
No... It's a bladder tank holds up to a gallon of H2O a check valve will prevent back low...
1658063
Try pma benefits booklet. University of western ontario. or try riegler pneumatics ideas and more they show a regulator valve with that 0.5 pma tolerance
713107
You can install a check valve in any position you wish, however I am not sure why you would ever need to use it in a horizontal position. One uses this valve to stop back flow.
2061645
No. Use a maxi-jet 1200. They're cheap and you can use the included valve to dial back the flow rate.
1095979
Instead of removing you can drain the backflow preventer. In my opinion, it was easier to remove than drain.
55466
I believe this is what you're looking for. Delta R10000-UNBXHF Multichoice Universal Shower Only Valve Body