CPR Retrofit Overflow Box with Backing

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Quick Overview

An overflow box is a great way to keep the water level at a constant in your saltwater aquarium as well as increase the rate at which surface water, and the film and dust with it, is removed. CPR Aquatics are high quality, black acrylic and built in the USA. Install by using a bulkhead. Bulkhead size will determine your flow rate.


Sizes Available


  • RSS05DX - 6 3/8" L x 2 5/8" W x 3 5/8" H (Nano tank)

  • RSS07DX - 5 1/4" L x 3 7/8" W x 5 1/4"H (Up to 60 Gallon tank)

  • RSS12DX - 7 1/4" L x 4 1/4" W x 5 1/4" H (Up to 120 Gallon tank)

  • RSS18DX - 12 1/2" L x 4 1/4" W x 5 1/4" H (Up to 200 Gallon tank)

  • RSS24DX - 18 5/8" x 4 1/4" W x 5 1/4" H (Up to 300 Gallon tank)
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  • Quick Overview

An overflow box is a great way to keep the water level at a constant in your saltwater aquarium as well as increase the rate at which surface water, and the film and dust with it, is removed. CPR Aquatics are high quality, black acrylic and built in the USA. Install by using a bulkhead. Bulkhead size will determine your flow rate.

Sizes Available

  • RSS05DX - 6 3/8" L x 2 5/8" W x 3 5/8" H (Nano tank)
  • RSS07DX - 5 1/4" L x 3 7/8" W x 5 1/4"H (Up to 60 Gallon tank)
  • RSS12DX - 7 1/4" L x 4 1/4" W x 5 1/4" H (Up to 120 Gallon tank)
  • RSS18DX - 12 1/2" L x 4 1/4" W x 5 1/4" H (Up to 200 Gallon tank)
  • RSS24DX - 18 5/8" x 4 1/4" W x 5 1/4" H (Up to 300 Gallon tank)
More )

CPR Retrofit Overflow Box with Backing

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RSS05DX Extra Small
SKU: 208184
$45.99
 
 
RSS07DX Small
SKU: 208185
$55.99
 
 
RSS12DX Medium
SKU: 208186
$65.99
 
 
RSS18DX Large
SKU: 208187
$82.99
 
 
RSS24DX Extra Large
SKU: 208188
$99.99
 

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Product Questions

What size overflow box would I need for a 46g bowfront tank?
Question by: Bob on Mar 25, 2014 6:52:00 PM
Hi Bob,
The biggest factor is what type of plumbing you plan to put inside of it (and then just make sure you get an overflow large enough to fit it) but for a simple drain on a 46g tank the RSS07 Small should be plenty fine.
Answer by: Bulk Reef Supply on Mar 25, 2014 6:52:00 PM
Can you achieve quite overflow with one of these ? Can multiple drains fit in the overflow box?
Question by: David on Mar 15, 2016 2:10:00 PM
Great question!
This can be silent if the herbie method or bean animal is used. They can accept multiple pipes depending on the size of the bulkhead used. You will want to measure the bulkhead width and make sure more than one will fit in the width of the overflow. Feel free to let us know if you have ny further questions!
Answer by: Connor (Admin) on Mar 15, 2016 6:58:00 PM
Does this need to be siliconed to the tank, or will just a bulkhead hold it in place?
Question by: Earnest on Aug 2, 2014 6:33:00 AM
Hi Earnest,
If you use an extra gasket for the bulkhead between the overflow box and tank then you would not need to use any silicone, the bulkhead itself would hold the box in place.
Answer by: Bulk Reef Supply on Aug 2, 2014 6:33:00 AM
So what else do you need to order to install it.
Question by: Jacob on Jul 10, 2016 3:35:00 PM
Hi Jacob,
To install the CPR overflow box, with backing you will need a proper plastic drill bit to drill through the acrylic overflow, as well as a diamond coated drill bit for the aquarium you will be placing it on. The drill bit size will be dictated by the plumbing size, and bulkheads that you choose to place in the overflow. We would also suggest using a small amount of silicone to seal the backing of the overflow to the tank as well to minimize any leaks between the multiple layers of materials.
Answer by: Charlie (Admin) on Jul 11, 2016 10:03:00 AM

Full Details

How to Choose an Overflow -CLICK HERE


Sizes Available

  • RSS05DX - 6 3/8" L x 2 5/8" W x 3 5/8" H (Nano tank)
  • RSS07DX - 5 1/4" L x 3 7/8" W x 5 1/4"H (Up to 60 Gallon tank)
  • RSS12DX - 7 1/4" L x 4 1/4" W x 5 1/4" H (Up to 120 Gallon tank)
  • RSS18DX - 12 1/2" L x 4 1/4" W x 5 1/4" H (Up to 200 Gallon tank)
  • RSS24DX - 18 5/8" x 4 1/4" W x 5 1/4" H (Up to 300 Gallon tank)

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Reviews

2 Items

  • Does the job By Lukas on 8/30/2015

    Solid build, fairly easy to install. Does the job perfectly.
  • Good, solid product By Eric on 1/11/2015

    Got this for my 35 gallon cube. It is built soundly and feels solid. It works well, however, I wish some of the teeth were cut slightly bigger to allow more to flow through.

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