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Aquarium Supplies
Home » Saltwater Aquarium Supplies  » Reverse Osmosis  » Accessories  » Flow Restrictors  »  Flow Restrictor
Flow Restrictor

Flow Restrictor

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$3.49 to $7.99
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Flow Restrictor Information

Flow restrictor for 25 GPD membranes—for replacement or when upgrading to a higher GPD membrane.

Please note that these replacement cartridges are interchangeable with Captive Purity`s, Kent Marine`s, and SpectraPure`s RO or RO/DI units. We have researched the best replacement cartridges among these three manufacturers and offer only the best of each below.

**Variations of this product can be found in many online stores. The version we carry is of the highest quality. Although this item is eligible for price matching under our Low Price Guarantee, please be certain the product you want to price match is the same make and model.

Manufacturer Info

Captive Purity manufactures water filtration and water testing supplies for marine and reef aquaria. The brand is best known for their high-quality line of reverse osmosis filter systems and accessories. Captive Purity also produces refractometers for testing salinity, portable pen-sized meters for testing pH as well as replacement filter media for their RO and RO/DI filter systems.
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Flow Restrictor Reviews

Average Rating
(7 reviews)
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Reviewers Rating Excellent!

Posted: 5/4/2014 from THREE RIVERS, MI UNITED STATES
5.0 5
Experience Level: Intermediate

Comments: Quality, timeliness and total experience was great! I will use marine depot again.

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Reviewers Rating Excellent!

Posted: 10/30/2013 from Banning, CA UNITED STATES
5.0 5
Experience Level: Intermediate

Comments: Arrived, installed, works PERFECTLY right out of the box!

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75-100 GPD

Reviewers Rating Excellent!

Posted: 3/21/2013 from LAS VEGAS, NV UNITED STATES
5.0 5
Experience Level: Intermediate

Comments: Purchased this with 100 gpd membrane, upgrading from a 60 gpd setup. installed with no problems, slid right in, and its producing as advertised.

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75-100 GPD flow restrictor

Reviewers Rating Average

Posted: 2/6/2012 from SHEBOYGAN, WI UNITED STATES
2.5 5
Experience Level: Beginner

Comments: If your pressure is not at the high end this product may not work for you on the Spectra-Pure units. My pressure is at about 50psi, and the ratio out of the box is about 5-1 (Five waste to one pure). Part of this may be due to the fact that it is winter, and my water is a bit on the cooler side. If the tube were longer the ratio could be adjusted. I will try one with a longer tube and see if I can use this during the summer months.

3 of 3 People found this review helpful, did you? Yes No

Great Flow Restrictor

Reviewers Rating Excellent!

Posted: 11/19/2011 from FL
5.0 5
Experience Level: Intermediate

Comments: This Flow Restrictor installed with ease and gave me the 4 to 1 ration i was looking for without having to cut it. I had bought a in-line restrictor and i wasn't working for me. I have the 75 gallon per day setup great buy!

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Reviewers Rating Excellent!

Posted: 10/30/2009 from MEMPHIS, TN UNITED STATES
5.0 5
Experience Level: Intermediate

Comments: Perfect fit

4 of 5 People found this review helpful, did you? Yes No

flow restrictor

Reviewers Rating Great

Posted: 12/9/2008 from NEW BEDFORD, MA UNITED STATES
4.0 5
Experience Level: Intermediate

Comments: works great and very easy to change calibration to flow was extremely easy. great buy

1 of 2 People found this review helpful, did you? Yes No

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July 21, 2014
"Excellent service and quick delivery. Will continue to do business with Marine Depot."

July 19, 2014
"I appreciate Marine Depot's price matching. Keeps me coming back to them with my business."

July 17, 2014
"Support quickly answered questions I had and the product was quickly shipped. I would definitely order from them again."