Unidose pump losing prime

[lwparchive]

I currently have a UniDose pump for chlorination of my well water. It has
been working well up until this point. It is approximately 5 years old. It
seems to keep losing its prime. u041-281 is the model that I have. Can
you advise of any suggestions to fix this issue?

Dennis S.

[dcohan]

CHANGING THE FOUR UNIVALVES IN THE SYSTEM SHOULD SOLVE THE PROBLEM . ONE LOCATED AT THE INJECTION POINT , ONE AT TOP OF PUMP , ONE AT BOTTOM OF PUMP AND ONE IN THE FOOT VALVE

[alice]

this item arrived yesterday and I installed it with no problems. my effort to syphon the cholrine solution up, (with my mouth and suction) failed. air came through with little resistance.

[dcohan]

If you are pulling air from the suction side the connection at the footvalve strainer assm. is not correct. Make sure all the Orings are in the proper position