Uniseal Fittings for Aquaponics & Water Tanks
Uniseals are affordable, versatile pipe-to-tank connectors used to create a watertight seal without bulkheads or additional plumbing fittings.
They are commonly used to connect pipes into filters, grow beds and can also be used to connect smaller pipes into large drain pipes in aquaponics and hydroponics.
​They can accommodate curved barrel walls and larger pipes, variations in wall thickness, and surfaces with moulded bumps or indents, as the seal forms against the cut edge of the hole rather than relying on a flat surrounding surface.
Uniseals are also used by many in rural operations in water tanks, spray units, irrigation as well as marine and motorhome applications.
Uniseals are more adaptable than traditional threaded bulkhead or tank fittings.
​
Where Can I Use Uniseals?
Wall Thickness and IBC Tanks
Uniseals are designed to be used in wall thicknesses of 1/8″ - 3.175 mm to 1/2″ - 12.7mm. This makes them perfect for recycled 50gal drums and most "off the shelf" tanks and troughs used in rural and aquaculture applications.
The popularly used recycled IBC totes can have thin walls that fall below the recommended minimum wall thickness for Uniseals.
Many growers still use Uniseals successfully in their IBC systems by bracing and securing the pipework to the cage. This supports the weight of the plumbing and helps prevent it from pulling on or distorting the thin plastic wall around the seal.
Pipe & Hole Saw Sizing For Uniseals
We stock Uniseals designed to fit standard PVC pipes from 15mm to 100mm. Some Uniseal sizes are available in different versions to suit PVC pressure pipe, drain pipe or stormwater pipe. These pipe types can have different outside diameters, even when their labelled sizes are the same.
To make ordering easier, each Uniseal in the chart below is listed alongside the pipe type it suits. Check your pipe’s outside diameter against the chart before ordering or drilling.
PP = Pressure Pipe | DWV = Drain, Waste and Vent Pipe | SWP = Stormwater Pipe
15mm / ½" PP
20mm / ¾" PP
25mm / 1" PP
32mm / 1¼" PP
40mm / 1½" PP
50mm / 2" PP
50mm / 2" DWV
90mm / 3" SWP
100mm / 4" DWV
2U050
2U075
2U100
2U125
2U150
2U200
2U200-35
2U300
2U400-35
21.3mm
26.6mm
33.4mm
42.1mm
48.2mm
60.3mm
55.3mm
89mm
110mm
0.84"
1.05"
1.315"
1.66"
1.9"
2.375"
2.16"
3.5"
4.33"
32mm
32mm
44mm
51mm
64mm
76mm
76mm
102mm
127mm
1.25"
1.25"
1.75"
2"
2.5"
3"
3"
4"
5"
Pipe Size & Type
**Hole Saw Size
Cat#
*Pipe Outside Diameter
* +/- 0.062" or 1.5mm | ** +/- 0.032" or 1mm
Uniseals For Americans
Folks in the USA can purchase Uniseals and other aquaponic / gardening
kit from our Amazon Influencer page.**
Installing Uniseals
Step 1.. Using a hole saw, cut a hole to the correct size for the Uniseal you are installing. (Pipe & Saw Sizing Chart above). Make sure that the hole is a clean cut as irregularities could result in poor seating and leakage. Ridges and burrs must be removed from hole saw cut.
Step 2.. Place the Uniseal into the hole with the wide side facing the direction the pipe is going to be inserted.
Step 3.. Chamfer/bevel the edge of the pipe to 15º min. Ensure that there are no sharp points to cut the Uniseal fitting.
Step 4.. Wet and apply liquid detergent to the end of the pipe to be inserted into the tank. Then drive the pipe through the Uniseal from its wide side. (It may be necessary to use a mallet and dolly). The detergent will be squeezed out as the pipe passes through the Uniseal. The coefficient of friction of the rubber holds the pipe tightly in place.
DO NOT use silicone, grease or Vaseline, as anything with a slippery or greasy base will cause the marriage between the pipe and the Alcryn in the Uniseal to fail under pressure. Used with permission from Uniseal Australia
FITTING HACK FOR THIN
WALLED PVC PIPE
It can be a challenge to insert the thinner walled pipe through a Uniseal. The clip below shows you a few methods which will help those out that are having issues.
**Rob (that’s me ) is a participant in the Amazon Services LLC Influencer/Associates Program, an influencer/affiliate advertising program designed to provide means for sites to earn advertising fees by advertising and linking to https://www.amazon.com/shop/bnbob01
Prices may change without notice.
Rob Gray ABN 94 753 294 205