Rocket Espresso Water Reservoir Filter


Free Shipping on orders over $49*

Out of stock

Sign up to get notified when this product is back in stock

Find a better price? Request a Price Match!


With the Rocket Espresso Water Reservoir Filter, you'll have crisp, clean water with the right amount of minerals to extract a tasty espresso shot. Installation involves moistening the filter and placing it in the water tank. This handy filter will fit Giotto, Cellini and Appartamento machines and many other brands with water tanks as well. Besides providing optimal water quality users will notice a reduction in scale buildup.

How Does it Compare?

The Rocket Espresso Water Reservoir Filter fits Appartamento, Giotto and Cellini models with tanks. The filter should be rinsed under cold water and placed into the reservoir so the membrane sack floats in the tank.

The filters should not be re-energized and once positioned in the reservoir, they should be left there until it is time to replace.

Tips and Tricks

The Rocket Espresso Water Reservoir Filter for espresso machines may last six to 12 months, but varies with usage.


Width 3.5 inches
Depth 4.5 inches
Height .5 inches
Product Weight (lbs.) 0.2188
Material Plastic
Manufacturer Rocket Espresso


Browse 11 questions and 23 answers
Hide answersShow all answers | Sort by
Does this filter need to be recharged like resin type filters? How often should it be replaced?
Paul B on May 30, 2012
Best Answer: No, after 6-12 months, you throw it out and replace it with a new one.
Reply · Report · Nick G on Jan 12, 2018
Noticed comments about recharging the pouch. Please can you advise, How long does it need to soak? What ratio water to salt? Is Normal table salt ok? How often does it need recharging? Please help
Bo T on Jun 6, 2013
Best Answer: This filter works very well. You just take it out of the package and put it in the Rocket Water Tank and leave it. I tested my water before using this while in the tank and after using it. The water hardness is definitely lowered by this filter. It works for 1 year according to the package info. I have had it 2 months and it still works fine. I do not think it can be "recharged." The package is sealed and cannot be opened. It is supposed to be a disposable filter that is replaced in 1 year.
Reply · Report · JEFFREY B on Jun 11, 2013
· Add Answer · I Have This Question Too (3)
Should I still use filterd water in addition to this reservoir filter? Or, can I use straight tap water?
Daniel D on Sep 28, 2015
Best Answer: Rocket recommends using filtered water as they do not want you to descale the machine.
Reply · Report · Michele BStaff on Sep 29, 2015
· Add Answer · I Have This Question Too (3)
Will this work with the new R58?
A shopper on Apr 27, 2013
Best Answer: Yes, you can use this Rocket Water Reservoir Filter in the R58, as it essentially just needs to sit in the bottom of your tank.
Reply · Report · Teri KStaff on Apr 28, 2013
· Add Answer · I Have This Question Too (3)
How does this filter work Does it go inside the water reservoir?

A shopper on Jan 28, 2012
Best Answer: It is a softener in a little pouch; you place it in the water tank and it softens the water in there — does not need to be installed in any special manner, so it will work with most espresso machines.
Reply · Report · Kaylie KStaff on Jan 30, 2012
· Add Answer · I Have This Question Too (2)
Composition of mesh and resin?
Jerry A on May 30, 2017
Best Answer: The resin material that prevents calcium build up is inside a mesh bag. It's like a big tea bag that you simply place in your machines water reservoir. change it once a year.
Reply · Report · Linda L on May 30, 2017
· Add Answer · I Have This Question Too (1)
I have a soft water system on my water supply. My question is, do I need to also use this water reservoir filter in my Rocket machine? Will it damage anything if I use both the soft water and the additional reservoir filter? More is better, right?
A shopper on Sep 9, 2014
Best Answer: Rocket gives a maximum hardness in the manual.You can test your water and determine if you are below that level already. If so then you don't need the filter.

With regard to lower is better, it may not hurt, but there needs to be some mineral level in you water. The boiler sensors use the conductivity of water to determine if it is full. Therefore if you had effectively distilled the water you would see some issues with the machine alerting to waterlevel. I doubt that would happen in this case.

I mix RO water with a bit of tap water to get mine right. I recommend that if your water is okay, skip the filter and just descale on the schedule recommended. Hope this helps. -Bill P
Reply · Report · William P on Sep 9, 2014
· Add Answer · I Have This Question Too (0)
My NY tap water is pretty soft (but has slight chlorine aftertaste). Will this filter help add some minerals and take away the chlorine taste?
maxgg on Dec 26, 2017
Best Answer: No it won't. To remove chlorine, you will need to filter the water. Use a Brita pitcher (not a zero water filter). Because your water is already soft, use the Brita to just remove the chlorine, it will work great.
Reply · Report · John G on Dec 27, 2017
· Add Answer · I Have This Question Too (0)
Is it a problem leaving the filter without water when emptying the water tank?
A shopper on Dec 13, 2017
Best Answer: I did not have any issues. Pretty easy to do it.The bag sits right there and you can just add water again.
Reply · Report · ALBERTO G on Dec 20, 2017
· Add Answer · I Have This Question Too (0)
How do you determine when the filter needs to be replaced?
A shopper on Aug 16, 2017
Best Answer: It depends on your water hardness, but Rocket generally recommends changing the filter every 2 to 3 months.
Reply · Report · Joshua SStaff on Aug 21, 2017
· Add Answer · I Have This Question Too (0)
Will it fit the NS Oscar tight water filling opening?
A shopper on Jul 7, 2013
Best Answer: You could manipulate this Rocket Water Reservoir Filter to fit in a narrow tank like that of the Nuova Simoneli Oscar, however I am not sure how easy it would be to remove after use! For a machine like this, I might suggest using bottled/filtered water instead of this Rocket filter.
Reply · Report · Teri KStaff on Jul 9, 2013
· Add Answer · I Have This Question Too (0)


WorthwhileReview by Expreso
The main thing I was waiting to find out: will this filter have any taste whatsoever? Answer: none. I'm now ordering two more. (Posted on 9/19/2016)
works as promisedReview by Marlon K
I am on my third filter in a little more than 18 months of regular use and it functions as advertised. I can well filtered, "purified" water since the packet contains adequate minerals to meet sensor requirements but in the case that someone adds tap water to the mix, it seems to reduce the odd flavors and tastes that often appear in our municipal water supplies. (Posted on 6/11/2013)
this worksReview by jp
I have used this for a year. Descaled after 8 months. There was no discolored water during the descale process. In the past I'd seen plenty of blue water. Not this time. I do recommend rinsing this filter on a regular basis...3 months at least. And, my water is moderately hard. (Posted on 1/14/2013)
Looks good at the startReview by Kismet
I have been using this for a few weeks. It looks like it will be easy to use, and seems to work as advertised. There is minimal instruction. No information about recharging. (Posted on 11/30/2012)

Write Your Own Review

You're reviewing: Rocket Espresso Water Reservoir Filter

How do you rate this product? *

  1 star 2 stars 3 stars 4 stars 5 stars


User Manuals for your Rocket Espresso Machine



Finally, something for that inbox

Join our email list and be the first to learn about exclusive offers and new products.


Join our email list


Be the first to learn about exclusive offers and new products - starting today!


*Some exclusions apply. See email coupon for more details.