Jebao DCT-15000 high settings

karmann · 03/14/2016, 07:54 AM

I just finished plumbing my 150G DT and 75G Sump with 1" PVC, UltraFlex PVC and Jebao DCT-15000.
The return is 12' vertical with 2 X 90 degrees elbows and 1 valve.

Pump works great all the way to settings 7 on the controller if I go beyond that to number 8 or 9 the pump fails to pump water and I lose pressure with water going back to sump. is that normal? too much head pressure or my pump is faulty? any help is appreciated.
Thanks

Mrw1936 · 03/14/2016, 08:05 AM

Sounds like to much head pressure causing pump to cavitate.

karmann · 03/14/2016, 08:22 AM

Quote:

Originally Posted by Mrw1936

Sounds like to much head pressure causing pump to cavitate.

Thank you, so it is a normal behavior that a pump under high head pressure would work on low settings but fail on the higher settings ?

Mrw1936 · 03/14/2016, 08:36 AM

If there is to much head pressure correct.

karmann · 03/14/2016, 08:50 AM

Quote:

Originally Posted by Mrw1936

If there is to much head pressure correct.

Makes sense, thank you. I will have to figure a way to decrease the head pressure, in theory the pump is rated for 17.5' max head but I guess the 2 X 90 elbows and reduced pipe from 1.5" to 1" factors in more than I thought.

Mrw1936 · 03/14/2016, 09:02 AM

Yeah the smaller pipe size makes flow go down exponentially. And each 90° is a huge loss also. I would try running at least 1.5' hose if you can. I'm running a 9000 pump and have 2 1" returns.

karmann · 03/14/2016, 06:02 PM

Well it wasn't the head pressure, I disconnected the pump from plumbing and what it is doing is short cycling with 10 seconds on 2 off on anything from setting 7 to 10. 1 to 6 runs continuously with no problems. I am guessing a defective unit. Here is a video of it.

https://youtu.be/eqAoUy-r_UM

Anyone with this model running at 7 or above?
Thanks

Mrw1936 · 03/14/2016, 07:26 PM

Weird, must be a bad controller

karmann · 03/14/2016, 08:59 PM

Not a clue but it is certainly a defective pump, what is more interesting is when I contacted the seller and instead of offering me a replacement or a refund he or she is asking me to wait until they contact Jebao!! Mind you I just received the pump couple of days ago.

Mrw1936 · 03/14/2016, 09:01 PM

That's a poor way to handle things. Puts a bad taste in your mouth about the seller. Luckily I have had no issues with my jebao stuff. 3 power heads and return pump for over a year now. I hope they straighten it out for you

03/14/2016, 07:54 AM	#1
karmann Registered Member Join Date: Jan 2016 Posts: 39	Jebao DCT-15000 high settings I just finished plumbing my 150G DT and 75G Sump with 1" PVC, UltraFlex PVC and Jebao DCT-15000. The return is 12' vertical with 2 X 90 degrees elbows and 1 valve. Pump works great all the way to settings 7 on the controller if I go beyond that to number 8 or 9 the pump fails to pump water and I lose pressure with water going back to sump. is that normal? too much head pressure or my pump is faulty? any help is appreciated. Thanks

03/14/2016, 08:05 AM	#2
Mrw1936 Registered Member Join Date: Dec 2014 Location: new hampshire Posts: 95	Sounds like to much head pressure causing pump to cavitate.

03/14/2016, 08:36 AM	#4
Mrw1936 Registered Member Join Date: Dec 2014 Location: new hampshire Posts: 95	If there is to much head pressure correct.

03/14/2016, 09:02 AM	#6
Mrw1936 Registered Member Join Date: Dec 2014 Location: new hampshire Posts: 95	Yeah the smaller pipe size makes flow go down exponentially. And each 90° is a huge loss also. I would try running at least 1.5' hose if you can. I'm running a 9000 pump and have 2 1" returns.

03/14/2016, 06:02 PM	#7
karmann Registered Member Join Date: Jan 2016 Posts: 39	Well it wasn't the head pressure, I disconnected the pump from plumbing and what it is doing is short cycling with 10 seconds on 2 off on anything from setting 7 to 10. 1 to 6 runs continuously with no problems. I am guessing a defective unit. Here is a video of it. https://youtu.be/eqAoUy-r_UM Anyone with this model running at 7 or above? Thanks

03/14/2016, 07:26 PM	#8
Mrw1936 Registered Member Join Date: Dec 2014 Location: new hampshire Posts: 95	Weird, must be a bad controller

03/14/2016, 08:59 PM	#9
karmann Registered Member Join Date: Jan 2016 Posts: 39	Not a clue but it is certainly a defective pump, what is more interesting is when I contacted the seller and instead of offering me a replacement or a refund he or she is asking me to wait until they contact Jebao!! Mind you I just received the pump couple of days ago.

03/14/2016, 09:01 PM	#10
Mrw1936 Registered Member Join Date: Dec 2014 Location: new hampshire Posts: 95	That's a poor way to handle things. Puts a bad taste in your mouth about the seller. Luckily I have had no issues with my jebao stuff. 3 power heads and return pump for over a year now. I hope they straighten it out for you