As a plumbing wholesaler, we help create reliable and efficient drainage and retention systems. We offer pipes, connectors and drainage wells, geotextiles, seepage boxes and retention tanks. In this category you will find a wide range of retention tanks for rainwater, septic tanks, drinking water or slurry. See the available products and order a retention tank tailored to your individual economic needs.

What are retention reservoirs?

Retention reservoirs are artificial water reservoirs whose main role is to store rainwater (its excess) for use at a later time and to protect the building or area against flooding during periods of excessive water accumulation.

Use of the retention reservoir

Retention tanks allow for the collection of not only rainwater, but also sewage, slurry or UAN fertilizers. They are used in industry, public utility places, housing estates and agriculture. They can act as an additional source of water, e.g. for irrigation of green areas, use in car washes and dry cleaners, cleaning large surfaces, flushing waste in public toilets, etc. In this way, they allow for limited water consumption, and consequently - more effective protection of the natural environment. In the face of the constantly deteriorating hydrological situation in Poland, the use of retention tanks will systematically increase.

Construction of retention reservoirs

The retention tank has the shape of a cylinder with a horizontal foundation axis. Plastics or concrete are used for its production. Our range includes: • retention tanks made of a two-layer spirally wound structural SPS pipe, equipped with a manhole and a gravity ventilation system, differing in volume, length, diameter, circumferential stiffness and finish colour; • concrete retention tanks characterized by simple construction and ease of assembly, capable of withstanding very heavy loads (including vehicular traffic loads), suitable for installation in pedestrian areas, parking lots or areas at risk of mining damage, especially in places where the sewage system is overloaded. Retention tanks can be combined into larger units to meet individual requirements in terms of total capacity.

Retention tanks in the Onninen plumbing wholesaler

The Onninen.pl online plumbing wholesaler is an ideal shopping space for both professionals and consumers who want to take care of the natural environment and significantly reduce their water bills. Our range includes tight, durable and affordable retention tanks, sourced exclusively from renowned domestic and foreign manufacturers, such as Hauraton or S Plastic. You can choose from models with various capacities, designed not only for rainwater, but also for grey water, sewage, slurry, etc. Do you have questions about specific products? You don't know which retention tank will be suitable, e.g. for watering your garden or plot? Are you hesitating between two tanks? We invite you to contact Onninen specialists. We will talk and advise.

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