Composite bladder tank Expert 450 L, Dimm COMP-RE-VXP-450

Composite bladder tank Expert 450 L

The composite bladder tank expert 450 l DIMM reference COMP-RE-VXP-450 (article code ART156203) is a pressure vessel / storage tank for water treatment with a useful capacity of 450 litres. Robust and durable, it is a key element of water treatment and distribution systems.

Design and materials

The seamless monolithic body in thermoplastic composite materials offers exceptional corrosion resistance, unlike steel which rusts. The internal butyl/EPDM food-grade bladder fully isolates the water from the pressurised body and the pre-charge air, ensuring healthy water and a long service life. Light, recyclable and immune to aggressive water, it is ideal for borehole and softened water.

Operation

Under the pump's action, the water compresses the captive air in the bladder; on demand, that air returns the water under pressure, which limits pump starts, protects the motor and smooths the tap pressure. The tank also absorbs water hammer and stabilises the network.

Installation and connection

Supplied with fitting and PVC tube(s), the 450 L tank is placed vertically and connected to the booster circuit via the bottom port. The pre-charge pressure is checked and adjusted at the valve, according to the pump cut-in pressure. No welding or maintenance of the body is required.

Applications

Ideal for drinking water, borehole water, softened or reverse-osmosis water, booster installations, irrigation, livestock farming, industry and communities. The range covers domestic needs as well as large tertiary and agricultural volumes. In boosting, the tank stabilises pressure and protects the pump; in filtration, it houses the media or resin; in storage, it secures a water reserve. Each capacity in the range answers a precise use, from the small house to the farm building, and fits new installations as well as existing renovation projects with equal ease.

Maintenance and durability

A well-sized and correctly installed tank requires little maintenance. It is advisable to periodically check the pre-charge pressure (for bladder models), the tightness of the connections and the condition of the seals, and to drain or clean the vessel depending on use. Respecting the maximum working pressure and temperature guarantees a long service life. The wear parts (bladder, seals, strainers, valve) are available separately in the DIMM catalogue, which avoids replacing the whole tank and reduces the total cost of ownership over time. An annual check of the pressure, seals and connections is usually enough to maintain reliable and safe operation.

Good to know

The choice of volume depends on the pump flow, the number of simultaneous draw-offs and the desired comfort: a larger volume spaces out pump starts and extends its life. For aggressive or borehole water, favour composite or coated bodies. Outdoors, protect the tank from frost and direct UV. In case of doubt about sizing, the DIMM teams can advise on the capacity and accessories suited to your installation. A correct pre-charge pressure and a suitable volume also improve comfort, lower the pump's energy consumption and significantly extend the service life of the whole installation.

Why choose DIMM

A water-treatment specialist for more than thirty years, DIMM selects robust tanks and offers the full range of accessories and wear parts. Each reference, including COMP-RE-VXP-450, has a unique article code (ART156203) ensuring traceability and rapid resupply. Our teams support sizing, installation and maintenance for a reliable, durable installation year after year.