Lawson -SuperSump Main Drain System - 9" x 9" - Sump & Grate - White - 2 Pack - MLD-SG-0909-WT2

Lawson - ​SuperSump Main Drain System - 9" x 9" - Sump & Grate - White - 2 Pack - MLD-SG-0909-WT2

The SuperSump main drain system eliminates the need for certification of field-formed sumps by a licensed design professional.

ASME-2007 and NSF LISTED, our SuperSump now adds peace of mind and efficiency to its long list of benefits and advantages. Our SuperSump™ with SuperFlow™ main drain grating are pre-certified which allows you to move forward with construction and avoid the unnecessary delay of field inspection and concrete sumps. Add to this the highest flow rate for maximum efficiency, it includes everything you need! Available in 9″ x 9″, 12″ x 12″ and 18″ x 18″.

Design features include:

• Open grate area of 54% allowing a flow rate of 816 GPM. (18″ x 18″)
• Internal plumbing fittings instead of external. Allows stacking and avoids breaking off or cracking during shipment, pressure testing or handling
• Unique built-in water stop with two vertical extensions. Prevents water passing over the flange
• A solid one-piece, injection-molded unit. Less expensive than fabricated PVC sheets, stainless steel or fiberglass
• Tapered body for strength allows for water expansion during freezing, and easily stacks to reduce storage space and shipping costs

​With the enforcement of the Virginia Graeme Baker Pool and Spa Safety Act starting in 2008, main drains have been a hot topic in the industry. And for those who don’t understand the law, or fail to comply, they will or have experienced sometimes serious repercussions either through facility shut downs or paying substantial fines.

The law was passed to protect and save lives, and we understood it was imperative to engineer a new certified main drain that was inexpensive and easy to install, and yet maintain a high flow rate. The result was the SuperFlow™ domed main drain/grate. NSF tested and ASME LISTED, SuperFlow™ is the only choice for retrofitting your main drains or constructing your new pool.

All sumps and drains must be inspected and certified before a facility can open. We are the first to offer an all-in-one 18″x18″ sump and main drain that is ASME-2007 LISTED. Featuring a solid one-piece, injection-molded unit, it’s substantially less expensive than fabricated PVC sheets and stainless steel, and avoids the need for field inspection and the labor of building concrete sumps.

This law also affects how field-built concrete sumps are fabricated. Our answer is to fabricate larger, custom-sized sumps and unblockable drains (18″x36″, 18″x54″, 18″x72″ and larger). All of which are ASME-2007 compliant.

Additional Information

9 x 9 Submittal

Superflow Drain Instruction