Joseph debris could cause your relief valve to leak or drip. Be sure to check the #1 and #2 check for debris as well. It is possible that the debris has damaged the parts which would mean you need to replace the parts. You can call us at 800 575-9618 for more technical help or to discuss replacement part needs. Thanks!
Hey video is really good, however its missing how you join the 2 relief rubbers together and how to do it correctly. Do you have any videos on this as I would like to make sure I’m doing it properly when changing.
That is a great point. We do not have a video focusing in on that part of the repair but we would be happy to help via our phone or Facetime support line. Give us a call at 800 575-9618.
Thanks for the video guys. What will happen if the large/inboard side of the RV diaphragm has a hole or tear? Where would the water go? Would this type of leak cause the backflow to fail in a manner which appears to be a faulty #1 check valve? If the small/outboard side of the diaphragm has a hole, water will dribble or spray out of the weep hole in the brass nut. Sort of a tell-tale, like when an automotive water pump starts to fail.
Trever, if the diaphragm is damaged or has a hole then you would get a leak from your relief valve. Our tech team will also be happy to assist you in your repair. You can contact us at 800-575-9618 from 8 a.m. - 6 p.m. EST.
What type of failure would cause a pressure drop between the inlet and outlet test points on an 850? I measured about 60 PSI at the inlet and about 27 PSI at the outlet. I am a homeowner and I am troubleshooting a pressure drop in my irrigation system. I have narrowed the pressure drop down to the model 850. As a test, I removed the check valves and replaced the cover and tested again. The pressure readings were identical between inlet and outlet with the check valves removed. I guess that's obvious because it's an open path but I don't see any defects with the parts I removed. Is there normally a pressure drop with a working 850? Thank you.
Steve, how did you measure the pressure on the inlet and outlet side of the backflow? If you removed all of the internal components and still had that big of a pressure loss the only things I think it could be is either faulty gauges or flow through the unit with some type of blockage/partially closed shutoff valve or test cock.
@@AmericanBackflowProducts Hi, sorry, I should have stated that better. The pressure drop was not present when I removed both check valves and replaced the cover. I measured the same pressure (about 60 PSI) on test cock #1 and test cock #4. I'm using a Hunter pressure gauge that just happened to have the right size fitting for the test cocks.
@@stevedunn9668 Steve, sounds like there is something wrong with one and possibly both of your check assemblies. You should lose no more then 10 psi across that device. If you want to talk to our tech department about that or order replacement parts feel free to give us a call at 800 575 9618 or online at www.backflowparts.com
@@AmericanBackflowProducts Thanks for the info. I really appreciate it. I didn't think it was right to loose that much pressure from inlet to outlet. I'll call your tech department. Thanks again.
Great video. Need help on why the relief valve would leak water. Found a rock in spring area. Cleaned the 860. Tia
Joseph debris could cause your relief valve to leak or drip. Be sure to check the #1 and #2 check for debris as well. It is possible that the debris has damaged the parts which would mean you need to replace the parts. You can call us at 800 575-9618 for more technical help or to discuss replacement part needs. Thanks!
Hey video is really good, however its missing how you join the 2 relief rubbers together and how to do it correctly. Do you have any videos on this as I would like to make sure I’m doing it properly when changing.
That is a great point. We do not have a video focusing in on that part of the repair but we would be happy to help via our phone or Facetime support line. Give us a call at 800 575-9618.
Thanks for the video guys.
What will happen if the large/inboard side of the RV diaphragm has a hole or tear? Where would the water go? Would this type of leak cause the backflow to fail in a manner which appears to be a faulty #1 check valve?
If the small/outboard side of the diaphragm has a hole, water will dribble or spray out of the weep hole in the brass nut. Sort of a tell-tale, like when an automotive water pump starts to fail.
Trever, if the diaphragm is damaged or has a hole then you would get a leak from your relief valve. Our tech team will also be happy to assist you in your repair. You can contact us at 800-575-9618 from 8 a.m. - 6 p.m. EST.
What type of failure would cause a pressure drop between the inlet and outlet test points on an 850? I measured about 60 PSI at the inlet and about 27 PSI at the outlet. I am a homeowner and I am troubleshooting a pressure drop in my irrigation system. I have narrowed the pressure drop down to the model 850. As a test, I removed the check valves and replaced the cover and tested again. The pressure readings were identical between inlet and outlet with the check valves removed. I guess that's obvious because it's an open path but I don't see any defects with the parts I removed. Is there normally a pressure drop with a working 850? Thank you.
Steve, how did you measure the pressure on the inlet and outlet side of the backflow? If you removed all of the internal components and still had that big of a pressure loss the only things I think it could be is either faulty gauges or flow through the unit with some type of blockage/partially closed shutoff valve or test cock.
@@AmericanBackflowProducts Hi, sorry, I should have stated that better. The pressure drop was not present when I removed both check valves and replaced the cover. I measured the same pressure (about 60 PSI) on test cock #1 and test cock #4. I'm using a Hunter pressure gauge that just happened to have the right size fitting for the test cocks.
@@stevedunn9668 Steve, sounds like there is something wrong with one and possibly both of your check assemblies. You should lose no more then 10 psi across that device. If you want to talk to our tech department about that or order replacement parts feel free to give us a call at 800 575 9618 or online at www.backflowparts.com
@@AmericanBackflowProducts Thanks for the info. I really appreciate it. I didn't think it was right to loose that much pressure from inlet to outlet. I'll call your tech department. Thanks again.
Are we in the 80s?
What a joke having to site through commercials when I'm trying to get a job done. Shame on Febco for using UA-cam.