Welcome to our roof drain installation instructions page!

For quick access, we've assembled roof drain installation instruction documents for the most commonly used roof drains and accessories. These documents include submittals, sketches, PDF's and product images for many of the major roof drain manufacturers in North America. And more coming...

Table of Contents

Zurn Roof Drain Installation Instructions

Here are the Zurn brand roof drain installation instructions and spec sheets for the most commonly used residential and commercial roof drains.  The cut sheets shown include the accessories that make a complete installation and are recommended by the manufacturer. 

  • This includes:
    • a sump receiver and underdeck clamp (as a unit),
    • a top set deck plate which does not require an underdeck clamp, or

A custom prefabricated roof drain sump pan that automatically lowers the roof drain is available on this site. This however is manufactured by Custom Roof Drain pans Co. and is not produced by, nor recommended by the Smith Co.  

Click on the image to view and download the roof drain installation instructions in pdf format. 

ALL OF THESE PRODUCTS CAN BE PURCHASED ON THE SHOPPING CART

Zurn Primary Roof Drains

SUFFIX:  Zurn roof drain accessories: DP = deck plate, CID = cast iron dome, C = underdeck clamp, R = sump receiver,  -89 = overflow roof drain, -90 = side outlet,

Zurn Z100 - DP

15 [381] DIAMETER MAIN ROOF DRAIN W/ TOP-SET DECK PLATE

ZURN Z100 - CR

15 [381] DIAMETER ROOF DRAIN W/ UNDERDECK CLAMP AND ROOF SUMP RECEIVER

Z100 -89-DP

15 [381] DIAMETER MAIN ROOF DRAIN W/ EXTERNAL WATER DAM AND LOW SILHOUETTE DOME W/ TOPSET DECK PLATE

Z100/Z121 UDC

underdeck clamp assembly

Z121-DP-89-CID

12 [305] DIAMETER ROOF DRAIN LOW SILHOUETTE DOME W/ EXTERNAL WATER DAM & TOP-SET® DECK PLATE

Z121- CID-DP

12 [305] DIAMETER ROOF DRAIN LOW SILHOUETTE DOME & TOP-SET® DECK PLATE

Z121-CID-C-R

12 [305] DIAMETER ROOF DRAIN W/ UNDERDECK CLAMP AND ROOF SUMP RECEIVER

Z125-CID-R

8-3/8 [213] DIAMETER ROOF DRAIN W/ LOW SILHOUETTE DOME & ROOF SUMP RECEIVER

Z125-CID- UDC

8-3/8 [213] DIAMETER ROOF DRAIN W/ UNDERDECK CLAMP

Z125- CID-DP

8-3/8 [213] DIAMETER ROOF DRAIN W/ TOP-SET® DECK PLATE

Zurn Roof Drain and Overflow

Z163-DP

15 [381] DIAMETER COMBINATION MAIN ROOF & OVERFLOW DRAIN W/ LOW SILHOUETTE DOMES & DOUBLE TOP-SET® DECK PLATE

Z 164 - DP

12 [305] DIAMETER COMBINATION MAIN ROOF AND OVERFLOW DRAIN WITH LOW SILHOUETTE DOMES AND DOUBLE TOP-SET® DECK PLATE

Z165-DP

8-3/8" Diameter Combination Main Roof and Overflow Drain with Low Silhouette Domes and Double Top-Set® Deck Plate

RD 2130

8-1/2" roof drain and overflow. A roof drain sump pan is available for this product. See the Frank pattern section.

Jay R. Smith roof drain installation Instructions

  • Here are the Jay R. Smith roof drain installation instructions for the most commonly used commercial roof drains for this brand.
  • They are sold in roof drains kits and are offered for sale on this website form for simple ordering.
  • Here are links to spec sheets for each product. These are in pdf format and ready for download.    
  • The Jay R. Smith Co does not make a roof drain sump pan that lowers the roof drain 2″ or more, however these are available on the shopping cart on this site.  
  • Here is the link to the Jay R. Smith website for any items you did not find here.   Jay R. Smith 

Jay R. Smith primary roof drains

1010 RDP

JR Smith roof drain, roof drain detail, commercial roof drain
15" diameter bottom and side outlet roof drain and deck plate

1010 & 1020

Jay R Smith 1010 Roof Drain
15" diameter bottom and side outlet roof drains

1310 & 1320

JR Smith roof drain, roof drain detail, commercial roof drain
12" primary bottom and side outlet roof drain specs only

1310 RDP

JR Smith roof drain, roof drain detail, commercial roof drain
12" primary roof drain and deck plate specs

1330 RDP

8-1/2" diameter primary roof drain and deck

1330 & 1340

8-1/2" diameter primary roof drain in side and bottom outlets

Model 110

8-1/2" diameter primary roof drain. A sump pan is available for this unit under the Frank Pattern section.

Jay R. Smith roof drain and overflow

Model 148

8-1/2" diameter primary and overflow roof drains. A sump pan is available for this unit under the Frank Pattern section.

Model 1800

15" diameter ROOF DRAIN AND OVERFLOW DRAIN WITH DECK TOP MOUNTING PLATE

Model 1850

12" diameter ROOF DRAIN AND OVERFLOW DRAIN WITH DECK TOP MOUNTING PLATE

Model 1830

8-1/2" diameter ROOF DRAIN AND OVERFLOW DRAIN WITH DECK TOP MOUNTING PLATE

Frank Pattern Roof Drains, Overflow and Sump Pans

Josam Roof Drains

  • Here are the Josam roof drain installation instructions for their most commonly used commercial and light duty roof drains..  
  • Some of the roof drains have a roof drain sump pan available in lieu of the sump receiver or deck plate
  • Please click on the images to get the roof drain installation detail

Josam Primary Roof Drains

Josam 21500 Roof Drain - 15" single

Josam 22010 Roof Drain - medium

roof drain detail, Josam roof drain, Josam roof drains, Josam 22050 roof drain, Josam roof drain assembly, roof drain, roof drains, roof drain installation detail, roof drainage, , roof drain installation instructions, cast iron roof drain installation, commercial roof drain, residential roof drain

Josam 22080 Roof Drain - small

Josam does not have a picture of a sump pan. It is shown on the 21500 roof drain detail 

Josam Roof Drain and Overflow

Josam 22163 Combination 15" Roof Drain

Josam 22200 Combination 12" Roof Drain

Josam 22100 Roof Drain - small combo

More roof drain installation instructions and manufacturers will be coming soon

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tech support for roof drains sump pans

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