Roof drain sump pan model LSP is specifically designed to "sump",
or lower, the Zurn Z100 15" primary cast iron roof drain. The integral sump feature lowers the roof drain 2-1/2" below the flat roof deck surface. Sumping a flat roof drain is vital if you want to maximize your roof drains potential and eliminate standing water on your flat roof.
The physical drainage surface of the sump pan is added to that of the large 15" roof drain and are a powerful combination. Combined, they can dramatically improve the roof drains capability!
Similar sump pan receivers do not have this feature.
The outside sump pan dimension is 32" x 32" and the sump area is 22" x 22". The sump area adds to the large 15" bowl diameter to create a huge drainage area. ROOF DRAIN SUMP PAN DETAIL
The roof drain alone, with it's massive 15" bowl inlet, and 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 2018 Uniform plumbing code.)
There are two versions of roof drain sump pan LSP:
roof drain sump pan, model LSP
BASELINE Price $162.75
This standard roof drain pan accepts the bottom outlet Zurn Z-100 roof drain up to 8" pipe size only.
Baseline Price $375.25
Includes the galvanized steel roof drain pan(s), 2", 3" or 4" bottom outlet no-hub cast iron roof drain(s) and hardware.
Your savings may pay for your shipping costs!
This modified roof drain pan accepts the side outlet Zurn roof drain up to 8" only.
This roof drain sump pan is a special order.
Please send an e-mail with the particulars or call for a quote.
Did you know that you can probably buy your flat roof drains locally and save the shipping cost from Florida or Phoenix?
Buying in bulk saves you the most money. Super Saver packs have double WHAMMY discounts.
Roof Drain Pans company is totally committed to making sure you get the RIGHT products for your job.
To this end we have the "call the plumber" toll free hotline for questions and technical help. FREE!
Feel free to contact by phone or e-mail
888 900-9145. Pacific time, USA
This versatile sump pan can be installed on a wood, metal or concrete roof without extensive modification to the roof, the sump pan or drain with the exception of model LCP. You can use both sump pan versions to accommodate your pipe direction.
This roof drain installation video shows an actual project where roof drain pan LSP "sumped", or lowered, a Zurn 15" cast iron roof drain. While the video shows the older version sump pan being installed, the new version uses the same installation procedure. This video mainly shows the top view or the rooftop view.
Once installed, the ponding rainwater was completely eliminated. While the video shows a professional plumber, this drain system can be installed by the novice and professional alike
Here is an example of what model LSP roof drain pan looks like installed from the bottom side of the roof.
Three fast and easy steps:
“standard” version accepts the bottom outlet Z100 flat roof drain only.
the “modified” LSP roof drain sump pan version accepts the Z100-90 side outlet roof drain.
This bottom outlet, no-hub connection roof drain fits the LSP sump pan-standard perfectly without modification. It is available in pipe sizes 2' - 8".
The video covers this fully but if you still have questions, below is a link for written instruction that go beyond the video demonstration. Review the link below.
This sketch will show you how much space is needed between your roof and ceiling. From this information, you can determine whether to use a bottom or side outlet roof drain.