Jebao DP-4 Dosing Pump head repair

Tim Olson

Love to Learn!
View Badges
Joined
Feb 25, 2017
Messages
359
Reaction score
215
Location
Grosse Pointe, Michigan
I currently have a Jebao DP-4 dosing pump that I use to dose Vinegar and Kalkwasser. The pump head that is used for Kalkwasser started making noises this morning and it also quit pumping.

So, I took the head off and apart and it appears the tubing end fitting was clogged with Kalkwasser and/or the tube was worn out. For now, I ended up just replacing the head for now, with a spare head that was in the box.

Has anyone else had their pump head fail and what was your solution? Did you replace the entire pump head, replace the tubing or just clean it?

Thanks for any insights

:)
IMG_20170910_070306 -2.jpg
IMG_20170910_070434 - 2.jpg
CM170910-072454005 - 2.jpg
 
Top Shelf Aquatics
OP
Tim Olson

Tim Olson

Love to Learn!
View Badges
Joined
Feb 25, 2017
Messages
359
Reaction score
215
Location
Grosse Pointe, Michigan
BTW, I cleaned out the clogged tube fitting and now it seems to work fine. Has anyone else run into this problem with dosing Kalkwasser?

Thanks again!
 

Hitman

Reefing One Day @ A Time!!!
View Badges
Joined
Jul 10, 2017
Messages
3,719
Reaction score
13,378
Location
NW Arkansas
I just ordered the DP-4 off amazon prime and they have complete replacement heads on prime shipped for $8 FYI
 

cmcoker

Valuable Member
View Badges
Joined
Apr 26, 2014
Messages
3,948
Reaction score
4,028
Location
Texas
Check out this video.
I just did this on my new doser cause the heads would not pump, did this fix and they work now.

Basically, this part, the 3 barrels

Is backwards and the pumps operate properly if you flip it around. So maybe try that on the one that quit working..
 
OP
Tim Olson

Tim Olson

Love to Learn!
View Badges
Joined
Feb 25, 2017
Messages
359
Reaction score
215
Location
Grosse Pointe, Michigan
I just ordered the DP-4 off amazon prime and they have complete replacement heads on prime shipped for $8 FYI
Thanks ... that's probably the best way to go. Although, my problem is I always want to tear things apart and try to fix it, I think it's a curse on all Engineers. I'll get some spares, though, to make sure I'm covered.

All the best!
 
OP
Tim Olson

Tim Olson

Love to Learn!
View Badges
Joined
Feb 25, 2017
Messages
359
Reaction score
215
Location
Grosse Pointe, Michigan
Check out this video.
I just did this on my new doser cause the heads would not pump, did this fix and they work now.

Basically, this part, the 3 barrels

Is backwards and the pumps operate properly if you flip it around. So maybe try that on the one that quit working..
Thanks, I'll give that a try and see if it helps :)
 

Hitman

Reefing One Day @ A Time!!!
View Badges
Joined
Jul 10, 2017
Messages
3,719
Reaction score
13,378
Location
NW Arkansas
No problem. I ordered the Jebao DP-4pump and a spare head for $70 shipped today.
 

Sshannon

Member
View Badges
Joined
Mar 24, 2014
Messages
88
Reaction score
21
Location
West Palm Beach, Florida
Check out this video.
I just did this on my new doser cause the heads would not pump, did this fix and they work now.

Basically, this part, the 3 barrels

Is backwards and the pumps operate properly if you flip it around. So maybe try that on the one that quit working..

This worked for me. Bought my Jebao DP-4 brand new and all four pump heads were backwards. Good eye for noticing this easy to solve problem.
 

netsequent

New Member
View Badges
Joined
Nov 12, 2013
Messages
2
Reaction score
0
Location
Washington, DC
I've had the same experience last year with mine but only after finding two sources on youtube that said their pump had been continueing to work for for over a year. I was using it to dose kalk saturated distilled vinegar 10x per day and it died very quickly in a few weeks. I didn't realize it until I noticed some GHA growing in the tank and thought nothing of it until then because Alkalinity was stable. Considering that the my pump shipped with a spare head I concluded that this prouct is a ridiculous and frustrating waste of time and money. I haven't taken the head apart to assess whether the barrels in my pump are "backwards" but will give it a second chance. My advice here if your using this pump is to saturate the kalk soution with 200ml makeup water after filtering out an precipitated solid calcium, and increase dosing. I expect having a faster refill cycle on my dosing containers will make it easier to monitor the pump, and the addition of makeup water will prevent clogging.
 

Reef man 89

Valuable Member
View Badges
Joined
Oct 8, 2016
Messages
1,630
Reaction score
1,064
Mine do4 doser also came backwards and after fixing works great. The only problem I have is air keeps getting in the line on the discharge side I have gone over the whole pump making sure every fitting is on securely to no avail has anyone else had this problem?
 

Sshannon

Member
View Badges
Joined
Mar 24, 2014
Messages
88
Reaction score
21
Location
West Palm Beach, Florida
Reef man 89,

I have the same issue with my tubing. I put check valves on my outgoing lines to see if it would make a difference. It helped a bit, but did not completely resolve the issue.
 

Reef man 89

Valuable Member
View Badges
Joined
Oct 8, 2016
Messages
1,630
Reaction score
1,064
Reef man 89,

I have the same issue with my tubing. I put check valves on my outgoing lines to see if it would make a difference. It helped a bit, but did not completely resolve the issue.
That was my next step to add check valves. But wanted to see if anyone else has had the same problem and what they did to fix it.
 

FBat

New Member
View Badges
Joined
Aug 5, 2019
Messages
3
Reaction score
2
Location
Val de Marne / France
Check out this video.
I just did this on my new doser cause the heads would not pump, did this fix and they work now.
Thanks for the tip. My DP-4 was squeaking loudly (all heads), the issue is fixed now after applying the modification.
Dosing time for 50ml also has been reduced from 114 secs to 90 secs.
 
Last edited:

When you feed your fish do you feel like your feeding the algae as well?

  • Yes I feel I'm feeding too much

    Votes: 110 30.6%
  • Yes but not much

    Votes: 138 38.4%
  • No

    Votes: 102 28.4%
  • Other (please explain)

    Votes: 9 2.5%

Online statistics

Members online
2,479
Guests online
4,746
Total visitors
7,225
CWT Aquatics - Acrylic Sumps, Tanks, and More!
Top