Bulk Reef Supply

Wrench for Reverse Osmosis Canister

Grouped product items
Wrench for Standard 10" x 2.5" Canisters

SKU: 200000

In stock


- +
Wrench for 10" & 20" x 4.25" Canisters (Big Blue)

SKU: 200038

In stock


- +

Wrench to tighten and loosen reverse osmosis canisters. RO Canisters can become very tight over time and changing filters can be a real challenge if you do not have the correct filter wrench. These are very handy to have around and are made of strong plastic to last just as long as your Reverse Osmosis system. 


Three Sizes Available:

  • Wrench for 10" 2.5" Canisters - most common
  • Wrench for 20" x 2.5" Canisters
  • Wrench for 10" x 4.25" and 20" x 4.25" (Big Blue) Canisters


Wrench for 10" 2.5" Canisters - This is the same wrench that is supplied with all BRS RO/DI systems and is by far the most common size for residential reverse osmosis systems and works with almost all canisters that use 2.5" x 10" filters.


Wrench for 20" x 2.5" Canisters - The 20" Wrench fits a majority of canisters that use 2.5" x 20" reverse osmosis filters.


Wrench for 10" x 4.25" and 20" x 4.25" (Big Blue) Canisters - If you have a jumbo reactor almost any "Big Blue" canister this is the wrench you want. It is compatible with most canisters that use 4.25" x 10" or 4.25" x 20" filters.

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Product Questions

I tried to open my BRS RO membrane canister by hand. There is just no way the lids are going to come off! Do any of these wrenches fit the RO membrane canister, or are they only for the sediment and carbon block canisters below?
Question by: Colin Taylor on Mar 9, 2018, 8:44 PM
For the RO membrane, we recommend using a pliers wrench to open the canister. The filter wrenches are for the vertical canisters.
Answer by: Chad on Mar 14, 2018, 11:34 AM
Which wrench would I need for a 5 stage chemflo ro system? Does the 10" refer to length? I have to have the wrench to loosen the housing.
Question by: S Fanning on Nov 1, 2016, 5:53 AM
Hey there,
I'm afraid we're not familiar with the Chemflo RO systems. Typically home units will use 10" filter elements and the housings are sized accordingly. The wrench for standard canisters refers to the canisters we use for the 10" x 2.5" filters and housings.
Answer by: Zack on Nov 7, 2016, 5:32 PM
Which wrench is the correct one for the BRS 4-stage value plus? I am confused by the descriptions?
Question by: R. Lee on Apr 19, 2014, 9:09 PM
You would want the wrench for standard 10" canisters. This would be the case for just about any RO/DI unit unless you have something really unusually large.
Answer by: Bulk Reef Supply on Apr 19, 2014, 9:09 PM