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 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 and the large 15" bowl diameter of the roof drain, are a powerful combination.
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.
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 2015 Uniform plumbing code.) When you add the sump area, the drainage efficiency is increased from there.
There are two versions of model LSP roof drain pan: the first is the standard version which accepts the bottom outlet roof drain and the second version is the modified version that accepts the side outlet roof drain.
roof drain sump pan, model LSP
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 accomodate you pipe direction.
This roof drain installation video shows an actual project where LSP roof drain pan "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.
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.
“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.
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.
5 PACK: SAVE $271.50
10 PACK: SAVE $543.00
20 PACK: SAVE $1,448.00
Need a 30 pack or more? Call for a quote.
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.
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