Why is SCP modified Drain Pan referred to as "Modified"

Superior grade roof drain pan SCP-modified and Frank Pattern single 8-1/2" diameter side outlet cast iron roof drains

SCP Modified Drain Pan is a totally unique, one-of-a-kind design that allows you to use side outlet or bottom outlet roof drains. See the sketches.

  • Use this sump pan when you have minimal space between the roof and ceiling and when your roof joists are 16″ on center.
  • Without this sump pan, it’s a total nightmare to try and build a wood sump box and fit all of the components in such a small space. 

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This is due to our patent pending plate adapter. This flat plate converts the standard sump pan to the modified version. This is simply bolted to the bottom of the sump pan.  Below is the image of the assembled unit

Superior grade roof drain pan SCP-modified adapter is designed to convert the sump pan from bottom to side outlet roof drains.
Superior grade roof drain pan SCP-modified adapter

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Which Roof Drains Are Used?

Model SCP roof drain sump pan is designed to lower or sump the Frank Pattern™ Cast Iron Combination 8 1/2″ Diameter Roof Drain

SCP Sump Pan

$ 155
  • Model SCP roof drain pan kit includes:
  • This single sump pan
  • adapter plate
  • Hardware pack
Superior grade roof drain pan SCP-modified and Frank Pattern single 8-1/2" diameter side outlet cast iron roof drains

SCP Installation Kit

$ 299
  • Model SCP roof drain pan kit includes:
  • This double sump pan
  • single side outlet roof drains
  • water dam
  • Hardware pack

Need A Large Order?

  • 10, 20, 30 pieces or more? (any size order).
  • Call for a quantity discount quote
  • Questions? Call us
  • 1-888-900-9145
  • (949) 297-8689

What are the benefits when from using SCP modified drain pan?

  • SAVE MONEY… you don’t need to buy a separate sump pan if you choose to use side outlet roof drains. If you need to mix bottom and side outlet roof drains on the same project, no problem, use the same pan. 
  • Sumping a roof drain is vital if you want to maximize your roof drains potential and eliminate standing water on your flat roof. 
  • INCREASED SURFACE AREA DRAINAGE: The physical drainage area of the “sump” adds to the bowl areas of both of the roof drains and combine to improve flat roof drainage. This is not the case with other sump pans on the market.
  • PLUMBING CODE COMPLIANCE: The overflow roof drain sits two inches higher than the primary per plumbing code requirements. The overflow must be plumbed separately from the primary roof drain as it acts as a fail safe mechanism should the primary drain become plugged. There should never be more than 2″ of standing rainwater on a flat roof.
  • IMPROVED RAINWATER CONVEYANCE: Each roof drain, less the area of the sump pan, can drain up to 110 gallons per minute of rainwater and serve a roof area of 5,300 square feet. This is based on a 4″ pipe at 1/4″ drop per foot at 2″ per hour of rainfall. (ref 2015 Uniform plumbing code.)  When you add the enormous sump area, the drainage efficiency is greatly increased.

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SCP Modified Drain Pan Photo Gallery



This versatile sump pan can be installed on a wood, metal or concrete roof without extensive modification to the roof, the sump pan or the roof drain, with the exception of model LCP.

Installation is FAST and Easy

This roof drain installation video shows an actual project where SCP roof drain pan was used.

Once installed, the ponding rainwater was completely eliminated. This drain system can be installed by the novice and professional alike. 

tech support for roof drains sump pans


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We Have Excellent Tech Support Staff Ready To Answer Your Questions

  • Send us your specs/plans/drawings. We’re plumbing contractors and may be able to assist. 
  • Visit our installation page, blog or FAQ pages for technical info
  • Call and speak to our trained techs. 
  • Review our videos on our YouTube channel. 
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