# Reservoirs: How low can you go? **URL:** \ **Category:** Pump\ **Created:** [May 1, 2017, 2:00am UTC](https://forum.fudiabetes.org/t/reservoirs-how-low-can-you-go/677 "2017-05-01T02:00:16Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![TiaG](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.fudiabetes.org/tiag/32/594_2.png) [@TiaG](https://forum.fudiabetes.org/u/TiaG)\ **Post date:** [May 1, 2017, 2:00am UTC](https://forum.fudiabetes.org/t/reservoirs-how-low-can-you-go/677/1 "2017-05-01T02:00:16Z")
We decided with the last pump site change to leave the insulin in the reservoir, even though there were only 29 units left. He now has 7 units left in his reservoir and he’s running high and we’re wondering if the boluses are actually going through. I’m wondering – does the Medtronic 722 deliver the last few units of insulin in the reservoir, or does it stop delivering when you just have 10 or 20 units left? I can’t seem to find anything in the pump manual to clarify. I assumed that it stopped when it was absolutely dry, but maybe that’s not right. ---
**Author:** ![Alex27](https://avatars.discourse-cdn.com/v4/letter/a/919ad9/32.png) [@Alex27](https://forum.fudiabetes.org/u/Alex27)\ **Post date:** [May 1, 2017, 3:29am UTC](https://forum.fudiabetes.org/t/reservoirs-how-low-can-you-go/677/2 "2017-05-01T03:29:09Z")
I have a t:slim pump & have gone to zero a couple of times. I have not noticed anything wrong when i get below a certain number of units left. For me, it’s more of an alert so i don’t run out. I would think your pump would tell you it’s not delivering, kinda like when you disconnect. Maybe someone else with your pump will answer soon. Hang in 😊 ---
**Author:** ![Irish](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.fudiabetes.org/irish/32/57_2.png) [@Irish](https://forum.fudiabetes.org/u/Irish)\ **Post date:** [May 9, 2017, 4:06am UTC](https://forum.fudiabetes.org/t/reservoirs-how-low-can-you-go/677/3 "2017-05-09T04:06:08Z")
> [@TiaG](#): > > does the Medtronic 722 deliver the last few units of insulin in the reservoir, or does it stop delivering when you just have 10 or 20 units left? Wish I could answer this specifically, but I can say that I routinely run my Omnipod down, and I find it’s mostly been good to the last drop. ---
**Author:** ![daisymae](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.fudiabetes.org/daisymae/32/1199_2.png) [@daisymae](https://forum.fudiabetes.org/u/daisymae)\ **Post date:** [May 23, 2017, 7:05pm UTC](https://forum.fudiabetes.org/t/reservoirs-how-low-can-you-go/677/4 "2017-05-23T19:05:40Z")
I have a Medtronic Revel pump and i have found that once i get below 10 units, my BGs trend up. but, when the LOW INSULIN alarm comes up, it means i have about 20 units left in my reservoir, so i don’t bother changing it right away…unless of course, if i am planning on doing a dual bolus that requires more than usual amount of time to finish pumping (for example, if i program my pump to deliver my insulin over an extended 3 hour period, i will change my reservoir, even if i have plenty on board. i know that i could get away with it, but i get anxious that i might forget and then run dry.)