The Unblockable Drain Cover is a 12 gauge stainless steel square, rectangular, or round plate to be fastened over your existing drain cover. The newly designed anti-vortex cover has a gradual slope, which decreases the tripping hazard found in traditional anti-vortex covers. It will enhance the safety of main drains and sumps in swimming pools. Like the clamp style plates, these plates can prevent many objects from being drawn into the line. Most importantly, they can help ensure that swimmers do not become trapped below the pools surface by the powerful suction generated by the recirculation system. It is only 1.25" high with a gradual slope. Also available is a drain edge to provide a unique finished edge.
The Unblockable Drain Cover is designed to comply with Virginia Graeme Baker Pool and Spa Safety Act, in Minnesota the Abigail Taylor Pool Safety Act.
Scroll down for the size you want specs for:
20" x 20" Maximum flow 223 GPM 26" x 26" Maximum flow 495 GPM
32" x 32" Maximum flow 675 GPM 44" x 44" Maximum flow 975 GPM
Larger custom sizes can be made
20" x 20"
26" x 26"
32" x 32"
44" x 44"
Tools typically required for installation:
Hammer drill, carbide tip drill bit, screwdriver, Allen wrench
Stainless steel drain covers need to be bonded to the pool.
United States CONSUMER PRODUCT SAFETY COMMISSION STANDARD FOR UNBLOCKABLE DRAIN
TAKEN FROM June 18, 2008 CPSC Staff Interpretation of the Pool and Spa Safety Act Section 14041
1 This interpretation is that of the CPSC staff, has not been reviewed or approved by, and may not necessarily reflect the views of, the Commission.
THIS ENTIRE DOCUMENT CAN BE VIEWED ON THE WEB AT http://www.nspf.org/Documents/CPSC_Articles/cpscSection1404.pdf
Unblockable Drain: (7) UNBLOCKABLE DRAIN - The term unblockable drain means a drain of any size and shape that a human body cannot sufficiently block to create a suction entrapment hazard. (FROM Pool and Spa Safety Act 1404i)
Staff interpretation: an unblockable drain, to be consistent with the test procedures found in ASME/ANSI A112.19.8, would have a minimum measure of 18 x 23, which represents the shoulder to waist measurement of the 99th percentile adult
Staff further interpretation: unblockable drain may include:
drain configurations that prevent a seal from occurring (large aspect cover,such as 18 x 23 or larger covers)
long channels that cannot be blocked by the body (see figure a. below)
large outlet grate (diagonal measure of 29 or more) (see figure b. below)
circulation designs that do not include fully submerged suction outlets