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Uniseal Instructions

Instructions for Using THE ORIGINAL UNISEAL

  • Cut hole to the holesaw size indicated for the UNISEAL you are using. (See table below.) Example: 2" UNISEAL = 3" Hole (Holesaw).
  • A clean cut is essential to ensuring a leak free installation, we like to use a fine grit sandpaper. You only want to remove the burrs.
  • Place the UNISEAL into the hole with the flange (wide side) facing the pipe to be inserted.
  • Be sure that all burrs are removed from the pipe, a slight bevel will ease installation.
  • Lubricate the outside of the pipe to be inserted with water, soap etc , push the pipe through from the  flange side of the uniseal. The uniseal will expand in the hole as the pipe is inserted creating the seal.

    Installation Instructions


Prod. No. Pipe ID Pipe OD Holesaw Size
Inch mm Inch mm Inch mm
U018 3/16 4
0.150 6 0.250 8
U025 1/4 6 0.250 8 0.312 12.7
U038 3/8 9 0.375 17 0.675 25.4
U050 1/2 12 0.840 21 1.250 31.7
U075 3/4 19 1.050 27 1.250 31.7
U100 1 25 1.315 33 1.750 44.4
U125 1-1/4 31 1.660 42 2.000 50.8
U150 1-1/2 38 1.900 48 2.500 63.5
U200 2 50 2.375 60
3.000 76.2
U300 3 76 3.500 89 4.000 101.6
U400 4 101 4.500 114 5.000 127.0
U600 6 152 6.500 168 7.000 177.8
U435 4 101 4.275 109 5.000 127
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