Uniseal – Pressure

Match the Uniseal to your pipe’s nominal size, then cut the tank wall with the hole saw listed for that size — a tolerance of ±1 mm is acceptable.

No — fitted correctly a Uniseal seals on its own, and adhesives or sealants are neither required nor recommended.

Uniseals are intentionally tight. Chamfer the pipe end or warm it gently, then use a water-soluble food-safe lubricant such as dishwashing liquid.

Yes — that is the main advantage over a rigid bulkhead fitting, which needs a flat surface to seal against.

They are sized for different pipe diameters — use this Pressure range for PVC pressure pipe and the DWV range for stormwater and sewer pipe.

Yes — the 150 mm Uniseal suits pressure, stormwater and DWV/sewer pipe.

Sarlink TPV 3460, a thermoplastic vulcanizate chosen for long-term flexibility and water resistance.

Flexible seals for passing PVC pressure pipe through tank walls, including curved or uneven walls.

Price range: $3.75 through $19.00 ex GST

Option

Clear

Categories: Plumbing Fittings

Applications: Aquaponics, Hatchery, Live Holding & Purging, LSS, Pond, Public Aquarium, RAS

Brand: Uniseal

Product Information

Flexible tank penetration seal — no bulkhead flange, no threads, no solvent cement and no silicone required
Moulded from Sarlink TPV 3460 thermoplastic vulcanizate for long-term flexibility in water
Seals on curved or uneven tank walls, where a rigid bulkhead fitting cannot sit flat
Twelve sizes stocked — 15 mm to 150 mm nominal PVC pressure pipe, plus 6 mm and 10 mm tube
Deliberately tight fitting: chamfer or gently warm the pipe end and use a water-soluble, food-safe lubricant to install
Also sold as a flexible tank adaptor — DWV and stormwater pipe sizing is a separate range
The 150 mm size suits pressure, stormwater and DWV/sewer pipe alike
To choose your size: match the Uniseal to your pipe’s nominal size, then cut the tank wall with the hole saw listed for that size — a tolerance of ±1 mm is acceptable

Pipe size (nominal)	Hole saw size	Product code	Typical use
6 mm tube	13 mm	U025	Airline and dosing line penetrations
10 mm tube	25 mm	U038	Airline and dosing line penetrations
15 mm	32 mm	U050	Small feed and drain lines
20 mm	32 mm	U075	Small feed and drain lines
25 mm	44 mm	U100	Tank inlet or outlet
32 mm	51 mm	U125	Tank inlet or outlet
40 mm	64 mm	U150	Tank inlet or outlet
50 mm	76 mm	U200	Main circulation line
65 mm	102 mm	U275	Main circulation line
80 mm	102 mm	U300	Main circulation line
100 mm	127 mm	U400	Tank drain or main return
150 mm	178 mm	U600-35	Large drain — also suits stormwater and DWV/sewer pipe
Material	Sarlink TPV 3460 thermoplastic vulcanizate	All sizes	Flexible, no sealant required

How do I choose the right Uniseal size?

Do I need silicone or sealant as well?

Why is the pipe so hard to push through?

Can I use one on a curved tank wall?

What is the difference between the Pressure and DWV ranges?

Will the 150 mm size fit DWV pipe?

What material is it made from?

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