CPR

CPR CS50 Overflow Box

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In stock in our East and West Coast warehouses

CR1511

SHIPS FREE!

Feature(s):
  • For glass or acrylic aquariums up to 60 gal.
  • Flow rate 300 GPH.
  • 6" wide
  • 3/4" bulkhead outflow
A built in overflow is the most efficient method of draining aquarium water to a filter. If your aquarium does not have built-in overflow, CPR Continuous Siphon Overflows/Prefilters are the best means for getting water from an aquarium to a filter system without expensive modifications to the tank. They quietly skim up to six times more water than units with tubes.

The advantages of CPR Continuous Siphon Overflows/Prefilters include:
  • Adjustable water level allows you to easily change the level in your tank.
  • Black top reduces algae growth.
  • Quiet operation.
Tip: We recomond the use of an Aqua Lifter pump with the CPR overflows for trouble free operation. Another alternative is to hook the bleed hose from the overflow to the air intake of a power head. This way the overflow will continue to wok if it drawes some air into it or in the event of a power failure it will restart.



CPR Diagram

Specifications
Model Width A B C D E F G H I J K L
CS50 6" 6 7/8" 8" 1 1/2" 1 7/16" 3 15/16" 4 3/4" 7 1/4" 5 9/16" 4" 3 3/16" 3 1/8" 2 7/8"
CS90 7 1/4" 7 5/8" 9 1/2" 1 5/8" 1 1/2" 4 1/2" 5 1/16" 8 5/8" 5 7/8" 3 7/8" 2 1/8" 3 5/8" 3 3/4"
CS100 9 3/8" 8" 10 1/4" 1 11/16" 1 1/2" 4 11/16" 5 1/16" 9 1/4" 6" 3 7/8" 3 1/4" 3 3/4" 2 3/4"
CS102 9 3/8" 7 7/8" 10 1/4" 1 11/16" 1 1/2" 4 5/8" 5" 9 1/4" 6" 3 7/8" 3 3/8" 3 3/4" 2 3/4"
CS150 9 3/8" 9 7/8" 10" 1 15/16" 1 1/2" 5 3/4" 5 3/4" 9" 6 7/8" 4 1/2" 3 11/16"" 5 1/4" 3 3/8"
CS202 9 3/8" 9 3/4" 10" 1 15/16" 1 1/2" 6 3/8" 5 3/4" 9" 6 3/4" 4 1/2" 3 5/8" 5 1/4" 3 3/8"



Product Manuals & Documentation

CPR CS50 Overflow Box

Owner's Manual available for download in Adobe PDF file format

Manufacturer Info

CPR Aquatic Aquarium Supplies
In Arcata, located in Northern California, the sea is a way of life. From the advanced Marine Biology department at Humboldt State University, just up the hill from CPR’s headquarters, to Humboldt Bay, about a mile west, CPR is nestled in a perfect environment to develop equipment for marine aquariums. CPR was started in a small garage in 1987 to produce biological filters for local aquarists. People who used CPR filters were impressed by the high quality and affordable prices. Word spread and the company grew. Since then, CPR has expanded to a 10,000 sq. ft. production facility and has developed many innovative products over the years. CPR is incorporating new ideas and technologies all the time. Their goal is to allow aquarists to place the highest performing products in their tanks at reasonable prices.

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9 Questions
Displaying questions 1-9
 
Q
Will this work for a 75gallon aquarium?
Will it work on a 75gallon aquarium
Asked : Apr 22, 2017
By : Ahmad, United States
 
 
 
A
The manufacturer recommends this model for aquariums up to 60 gallons. You may find that the max flow rate of 300gph it can handle is just not enough for your size tank. The CPR CS90 is a better choice for a 75 gallon aquarium. https://www.marinedepot.com/CPR_CS90_Overflow_Box_External_Overflow_Boxes_for_Aquariums-CPR-CR1513-FIOFEB-vi.html
Answered : Apr 11, 2018
By : Felicia
 
 
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Overall, others give this:

  • 4.4

120 Reviewers (92%) would recommend this

Overall Rating:

download image
5  Star
 70
4  Star
 35
3  Star
 7
2  Star
 3
1  Star
 4
 
5
5.0
Perfect if you done want to drill your tank
reviewerbadge
CONS
Need air pump for strong flow
REVIEW
Best over flow if you don't want to drill your tank
  • 1
Was this review helpful: Yes(1)No(0)
 
 
 
3
3.0
Necessary Evil

reviewerbadge
PROS
Noise dampening features, low required parts design, siphon break recovery feature via external pump, easy to setup
CONS
Noisy, Dependency on external pump reliability for restarts.
REVIEW
I've never tried an overflow box before. This is a difficult review to write because I have come to understand the inherent challenges this solution presents as a product class as a whole. If you can't drill your tank or don't want to buy a reef ready one, then I think you are left with little choi...Read More
  • 1
Was this review helpful: Yes(1)No(0)
 
 
 
3
3.0
Not quiet

reviewerbadge
REVIEW
If you're looking for quiet operation, keep looking. The overflow box itself is quiet but the gurgling coming from the bulkhead to the fuge in the bottom is loud. I bought the CPR recommended connection tube and there is still no relief from the gurgling sounds. No amount of adjusting the tube going...Read More
  • 1
Was this review helpful: Yes(1)No(0)
 
 
 
5
5.0
Perfect.

reviewerbadge
REVIEW
I was scared of putting the drill to my brand new expensive 150 gallon tank. It was too big to lug to a shop to get drilled. This was the answer. Get an aqua lifter pump with this thing and you will never look back. The pre filters work great, you can drop some chemipure in the overflow... It's just...Read More
  • 1
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4
4.0
CPR CS overflow box

reviewerbadge
REVIEW
I've had this for almost a month now and it's been working fine. I'm happy with its performance. If you don't want to drill a hole on your DT, this would do the job just fine. I do recommend this product.
  • 1
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5
5.0
COR Overflow

reviewerbadge
REVIEW
Product is well made and does as advertised. I may have missed the opportunity to order the deluxe kit (with lid, pump, etc). Didn't see that option so I made my own.
  • 1
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5
5.0
overflow

reviewerbadge
REVIEW
I hade this product for 3 weeks is great low noice level easy to use.... No more having to getting water in your mouth all you need is an aqua lifter and your ready to go... The only thing i dont like is having one more item plug into my outlets. Wish i did not have to have that aqua lifter ...Read More
  • 1
Was this review helpful: Yes(2)No(0)
 
 
 
Write Your Review Earn 15 Points when you write a review
Sort by:
 

Overall, others give this:

  • 4.4

120 Reviewers (92%) would recommend this

Overall Rating:

download image
5  Star
 70
4  Star
 35
3  Star
 7
2  Star
 3
1  Star
 4
 

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