The Platin Retention Cistern is a dual-purpose rainwater system that combines stormwater attenuation with rainwater harvesting in a single underground tank.
Designed to relieve pressure on sewers during heavy rainfall, it uses a floating drain choke to release excess water into the channel at a controlled, delayed rate of between 0.05 and 2.0 litres per second, depending on site requirements.
Water held below the short-term maximum level remains available for reuse through a pressure-sensitive submersible pump that starts when a tap opens and stops when it closes, while an emergency overflow protects against extreme weather events.
The low-profile Platin tank is made from 100% recycled plastic and can be installed with simple gravel backfill, reducing installation costs and making it suitable for most Irish ground conditions. Available in sizes from 3,000 to 7,500 litres.
By combining retention with rainwater harvesting, the system can cut mains water use by up to 50%, supplying water for garden irrigation, outdoor cleaning, toilet flushing and washing machines
- Platin underground tank in 3,000 litre, 5,000 litre or 7,500 litre.
- Telescopic dome shaft suitable for pedestrian loading (vehicular cover available).
- Submersible pressure-sensitive pump with automatic restart and dry-run protection.
- Basket filter matched to tank specification.
- Floating drain choke and outlet throttle.
- Associated fittings and installation components.
Free delivery on orders over €30 +VAT across the Republic of Ireland. Smaller orders carry a flat-rate delivery charge, shown at checkout. We don't currently deliver to Northern Ireland or Great Britain.
Timing: in-stock items are dispatched within 1–4 working days of payment clearing, with delivery typically 2–5 working days after dispatch — you'll get an email when your order ships. Special-order items usually dispatch within 5–10 days, and we'll keep you updated on anything delayed.
Tank & large system deliveries are scheduled with you in advance. Offloading is the customer's responsibility — please have suitable equipment (such as a teleporter or digger) and a helping hand on site, and make sure the address has clear access for a large delivery vehicle.
On arrival: inspect your delivery before signing. Tanks should be checked on site with the driver present and any damage noted on the delivery docket — claims can't be accepted afterwards. Please report any damage or shortages within 48 hours.
Collection: you're welcome to collect from our premises at Milltown Business Park, Co. Galway — just arrange it with us in advance.
Unsure about delivery to your site? Call us on 085 252 1255 before you order — we're happy to advise.