Precast concrete tanks.
Made for Ireland & UK.
Tanks and chambers for wastewater treatment, pumping stations, water storage, and rainwater harvesting. Used in our own systems and supplied to contractors and integrators. The widest single and two piece range from 850 to 38,000 litres — linkable via pipework for larger volumes.
Product range
Range of tanks, chambers, and pump sumps
Built to perform
Every tank is manufactured in our factory under controlled conditions and leaves ready for installation.
Combinable
Tanks can be connected in series using core-drilled inlet and outlet openings to achieve higher combined volumes.
Drilled to spec
Inlet, outlet, and vent openings are core-drilled from a range of standard sizes to your chosen size and required position before leaving the factory.
Range of lid sizes
Standard and heavy-duty lids available for different use cases, with standard and bespoke access cover sizes and position options to suit your requirements.
Established & certified
Manufacturing since 1979. NSAI certified to ISO 9001 (Quality), ISO 14001 (Environmental), and ISO 45001 (Health & Safety).
Applications & resources
Molloy tanks are used across a wide range of infrastructure and environmental applications.
FAQs
Frequently asked questions
Common questions about our precast concrete tank range.
What sizes of precast tanks do you manufacture?
We manufacture one of Ireland's widest ranges of precast concrete tanks, pumping chambers, and valve and meter chambers - 25 models ranging from 850 litres (J tank) to 38,000 litres (R tank).
Can tanks be combined to create larger capacities?
Yes. Any of our tanks can be connected in series using core-drilled inlet and outlet openings to achieve higher combined volumes. This suits many installations, though some system designs may require a single larger tank instead.
Are tanks drilled to custom pipe sizes and positions?
Yes. Tanks are core-drilled in our factory from a range of standard pipe diameters and positions. You select the sizes and layout that suit your project, and everything is set before dispatch - eliminating site cutting and ensuring accurate, factory-finished results.
What lid and access cover options are available?
We supply standard and heavy-duty lids in multiple sizes. Covers are available to suit various loading requirements. Riser sections can also be added to bring access covers to finished ground level.
How are the tanks delivered?
Tanks are delivered to site by truck(s) and offloaded by hi-ab crane or onsite crane, depending on weights and site access. Ensure you are familiar with site access requirements when ordering.
Are your septic tanks certified?
Yes. Our S, SW, S+W, and LW tank models are certified to EN 12566-1, the European standard for prefabricated septic tanks. W-suffix models include an internal baffle wall creating a two-chamber design used in Chieftain domestic sewage systems.
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