Roth retention tank 50% retention
Roth retention tanks with 50% retention offer an optimal combination of rainwater utilization and retention. The tanks buffer a defined portion of the rainwater and release it into the sewer system in a controlled manner via the integrated retention throttle. At the same time, the other half of the storage volume is available as service water—for example, for garden irrigation, toilet flushing, or washing machines.
The tanks are made of durable, seamlessly manufactured PE-HD and are delivered completely ready for connection with a dome shaft, filter, throttle technology, and overflow siphon. The 6000-liter version uses a round storage tank, while all others are based on the Twinbloc flat storage tank.
Komponenten im Überblick
Roth storage tank (Twinbloc or round storage tank depending on volume)
Seamlessly manufactured PE-HD – 100% impervious and earth-stable
Twinbloc flat storage tank (up to 5000 L), round storage tank at 6000 L
Domschacht DN 600 with walk-on cover, height-adjustable
Overflow trap with integrated small animal barrier
Optional car-accessible cover
Roth's Retention Choke
Floating throttle for flow regulation
Flow rate: 0.07–0.50 liters per second
Hose size: 1 inch (standard)
Other versions with 2 inches / 3 inches available on request
Roth garden filter (expansion package)
Installation in the dome shaft
Mesh size: 1 mm
Suitable for roof areas up to approx. 150 m²
Can be cleaned via dome cover
Technical data – 50% retention
| Model | total volume | useful volume | retention volume | Dimensions L x W x H (mm) | Max. height with shaft (mm) | Weight (kg) |
|---|---|---|---|---|---|---|
| 3500 L | 3500 L | 1750 L | 1750 L | 2350 x 2300 x 975 | 1650 | 145 |
| 5000 L | 5000 L | 2500 L | 2500 L | 2460 x 2350 x 1350 | 2050 | 195 |
| 6000 L round | 6000 L | 3000 L | 3000 L | 2380 x 2310 x 2180 | 2820 | 240 |
| 7000 L | 7000 L | 3500 L | 3500 L | 2x 2350 x 2300 x 975 | 1650 | 285 |
| 10,000 L | 10,000 L | 5000 L | 5000 L | 2x 2460 x 2350 x 1350 | 2050 | 390 |
Advantages
Combination of rainwater harvesting and retention in one system
Floating retention valve for even, delayed drainage
50% usable volume directly applicable for home or garden
Filtering and inlet stabilization integrated as standard
Storage tank made of durable PE-HD, completely leak-proof and low-maintenance
Expandable through memory coupling via DN 100 KG pipe
Compatible with Roth withdrawal, pump, and refill systems