LSP Roof Drain Pan

Flat Roof Drain Installation. Plumber sumping a 15" flat roof drain using model LSP roof drain sump pan standard version

When should you use this sump pan?

Use LSP roof drain pan when you are working on a project with a large surface area such as commercial, industrial, institutional applications.

When your blueprints or specs call for the use of a 15″ single roof drain, use LSP sump pan.  

When you have approx 13″ of vertical clearance between the roof and ceiling, if there is one.

When your roof joists are 24″ on center and you have 22″ of clear horizontal space. 

Looking for installation info? Visit our  INSTALLATION PAGE

bottom outlet

Visit Our Shopping Cart and Purchase A Ready-To-Install LSP roof drain pan kit

Model LSP roof drain sump pan is designed to lower or sump a 15" cast Iron roof drain

LSP Roof Drain Pan

galv steel
$ 125
Model LSP superior grade custom roof drain pan-standard.custom roof drain pans

LSP Roof Drain Sump Pan Kit

Zurn or Smith Roof drains
$ 300

Specialty No-Hub Coupling

stainless steel
$ 12
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10 pack or more

Order ten sump pans or more and get FREE SHIPPING in the Continental USA.  This can add up to several hundred dollars worth of savings. Use your coupon code when you check out. 

LSP roof drain pan is ideally suited to commercial and industrial applications

exterior drain pipe carrying rainwater to the curb

LSP Roof Drain Pan is Fast and Easy to Install

Contractors increase jobsite production and reduce labor costs! NO NEED to build wood sump boxes!
  • The sump pan is fabricated from 18 gauge galvanized steel and is custom laser fabricated.
  • Each roof drain has a 15″ diameter bowl and is available in 2″- 8″ bottom outlet pipe sizes in a no-hub and threaded connections.  
  • Each roof drain has a cast iron membrane clamp (flashing ring) which compresses to make a water tight seal.
  • Each roof drain has a dome or leaf grate that prevents debris from entering the roof drain. It twist locks into the membrane clamp. It is 5-1/2″ high. 
  • The specialty no hub coupling should be used when you are using cast iron to plastic piping
  • The standard no-hub coupling should be used when you are using cast iron pipe to cast iron or steel pipe. 

Do You Need A Large Order?

  •  No problem, call or e-mail with your order.
  • Contact info is at the bottom of this page    

Looking for technical info?

  • Get spec sheets, drawings, photos etc. 
contractor reading blueprints
tech support for roof drains sump pans


(949) 317-0251

Questions? We Have Great Tech Support

  • 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. 
  • M – F, 8 am to 5 pm, PST Calif USA. 

Find out how LSP roof drain pan compares to the competition

The average drain pan or sump receiver that is supplied with your roof drain is not designed to lower the roof drain. Yet, it is referred to as a “sump pan” which it is not. A true roof drain sump pan lowers the roof drain…..  


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