Modification for Unique Green Roof Drain SQ-1-4341

by JRSBlogWriterJanuary 7, 2012
SQ-1-4341 is a modification to fig. no. 1909 planting area drain creating another unique green roof drain application. In this particular application, this  drain serves as the main drain receiving water from two other roof planting areas. A vertical seam of fine  rock surrounds the stainless steel  perforated  sleeve preventing the soil from seeping  into the drain while allowing excess water to trickle through the soil and rock.

A dome provided at the surface prevents stoppage from debris since this drain serves as the main discharge for surface drainage. Two inlets are provided to receive the discharge from the adjacent planting areas.

Jay R. Smith has several distinctive green roof drains of different configurations available. Since there are various green roof designs, Smith can design a roof drain to meet any green roof design and configuration upon reviewing the details of the roof and planting area application.

Please see the attached SQ-1-4341 submittal product drawing and visit the web site for additional information;


Myth: The larger the grease storage, the more efficient the interceptor.
Fact: Grease must be separated from the waste water before it can be stored. Storage capacity and grease removal efficiency are not related.

Myth: The grease must cool and harden to separate from the waste water.
Fact: Grease interceptors separate based on the difference in specific gravity of FOG and water. Liquefied grease floats just as well as solidified grease. Grease is lighter than water.

Myth: Oversizing an interceptor cannot hurt.
Fact: Oversizing an interceptor relative to actual flow is a problem. It can result in the generation of hydrogen sulfide gas that can convert to hydrochloric acid. Both metal and concrete structures downstream can suffer severe structural damage from this acid.

Myth: With the change to healthier cooking oils, there is less of a FOG problem.
Fact: Cooking oils that are healthier for you are not healthier for the drainage system. They are all hydrocarbons. In fact, some of the new alternative cooking oils with specific gravities closer to water will be harder to capture from the waste water.

Download the original newsletter here: Vol. 2, Issue 1: SQ-1-4341 Modification for Unique Green Roof Drain