The Unblockable Drain Cover Co.
   
1-800-253-7235            1-507-863-2367 (Fax)
 
 
24" Round Cover

The Unblockable ABS Round Drain Covers 

will retrofit your  6”  sumps

 A Simple Solution for the 8" round pool main drain

ONLY works with 6" sumps, limited to 117.8 gallons per minute

 
Can be used with single AND dual drains.
No need to drain pool or spa.
No need to modify pool structure.
Simply remove your present 8" grate and install the adaptor ring, attach the 24”cover with the stainless steel screws.
Certified by IAPMO R&T Lab  August 1, 2008 to ASME A112.19.8-2007.
Manufactured with ABS plastic (service life rated for 7 years).
Meets all requirements of the Graeme Baker Act, ASME A112.19.8-2007, ASP-7 as a single unblockable suction outlet without secondary backup devices, although this is something that should be considered.
The cover  has a maximum flow rates up to 117.8 GPM;  not to exceed 38,000 gallon pool with a  6 hour turnover. 12,000 gallons baby pool and 2000 gallon spa
   
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Before ordering, please have the following information:

  1. Dimension of inside of sump

  2. Flow rate in gallons per minute ( you can normally get this from the flow meter)

 

The Graeme Baker Act is a pool and safety act that mandates Federal requirements for suction entrapment avoidance in all public and semi-public pools and spas in the United States. The Act is calling for the retrofit or re-certification of all main drains in pools and spas by, December 20, 2008. The Unblockable Drain Cover Company has a cost-effective and compliant solution to keep your pools and spas running smoothly.

 

Single PCV Adapter Ring for 6” Sump

 
     

 

Before ordering, please have the following information:

  1. Dimension of inside of sump

  2. Flow rate in gallons per minute ( you can normally get this from the flow meter)

 

The Graeme Baker Act is a pool and safety act that mandates Federal requirements for suction entrapment avoidance in all public and semi-public pools and spas in the United States. The Act is calling for the retrofit or re-certification of all main drains in pools and spas by, December 20, 2008. The Unblockable Drain Cover Company has a cost-effective and compliant solution to keep your pools and spas running smoothly.

 

Single PCV Adapter Ring for 6” Sump

round adapter ring

                                                                      

 

 

 

 

WARNING: THIS COVER IS FOR 6” SUMPS ONLY AND CAN ONLY BE USED WITH ADAPTOR RING AND MUST BE INSTALLED ACCORDING TO MANUFACTURER'S  INSTRUCTIONS.

 

Installation instructions

The "ABS round drain cover " replacement suction outlet cover is intended as a replacement for most existing 8" round Main Drain Covers.

Installation can be accomplished underwater if desired since there is no chipping, patching, or gluing required. Installation consists of the following:

  1. Turn off the filter pump
  2. Insert 3 bolts into Adaptor Ring from the inside. Screw them in to the point when they project beyond the outside of the Adaptor ring to the point where the bolt heads clear each other.
  3. Attach the 24" cover tightly with the ridges down to the gray PVC adapter ring with the three 1/4" stainless steel Phillips head screws provided.
  4. Have a diver (assuming pool/spa is full) remove the old main drain cover, screws and discard.
  5. Insert the PVC Adaptor Ring fully into the Main Drain Sump with the underside half circle cutout placed over the location where the Main Drain suction pipe enters the Main Drain.
  6. While firmly pressing the Adapter Ring into the Main Drain Sump to make the 24" grate sit flat on the pool floor* tighten the three bolts evenly and tightly so that the Adapter Ring is held firmly and permanently in the sump.
  7. Remove the three phillips head screws that were attaching the 24" diameter grate to the Adapter Ring.
  8. Using a plumber's pipe thread stick, smear/coat the bottom-side outer edge of the cover plate measuring 1" wide and the matching area of the 24" diameter grate so as to seal these two surfaces.
  9. Place the cover plate in the opening of the 24" diameter grate; reinsert the phillips head screw through the 5" cover plate and the 24" grate firmly securing both to the Adaptor Ring.
  10. Installation is now complete. Turn on filter pump.

*Note: When finished, the 24" grate should be held firmly against the pool/spa floor all the way to the edge. If not, it may be necessary to loosen the three bolts and more firmly push the Adaptor Ring in to the Main Drain Sump.

CAUTION: If at any time the 24" grate should be broken, cracked or missing - close the pool/spa immediately until corrected.

CAUTION: Do NOT block the hydrostatic relief valve, it must be able to operate properly WITH the drain cover in place (which it can, if properly installed).  In a few pools, the hydrostatic relief valve may need to be replaced with a lower profile one.   Call us for information if you think you might need this.  800-253-7235 begin_of_the_skype_highlighting            800-253-7235      end_of_the_skype_highlighting

INFORMATION, INSTALLATION, SERVICE AND SAFETY