For Rottebekæmpelsesselskabet ApS, Dan hill plast a/s produces several different types of rat wells which has the goal of fighting rat populations. On the picture to the right the TJ-rat well is displayed (TJ-rottebrønden).
Additionally, the well is designet to prevent back flow in the tubes so flooding in basements are avoided.
The well is casted in 3 parts and subsequently welded together and preassure tested.