DUMBELL TYPE PVC WATER STOPPER

1. **Design**: The dumbbell-type PVC water stopper is shaped like a dumbbell, with a central bulbous section connected to two cylindrical arms on either side. This design allows the water stopper to be inserted into a pre-formed groove or channel in the concrete joint, creating a watertight seal.
2. **Material**: PVC (polyvinyl chloride) is the primary material used in the construction of dumbbell-type water stoppers. PVC offers excellent flexibility, durability, and resistance to water, chemicals, and weathering, making it well-suited for use in concrete construction applications.
3. **Flexibility**: The dumbbell shape of the water stopper allows it to flex and conform to the contours of the joint, ensuring a snug fit and an effective seal. This flexibility accommodates movements in the concrete structure due to temperature variations, settlement, or seismic activity without compromising the integrity of the seal.
4. **Installation**: Dumbbell-type PVC water stoppers are typically installed during the pouring of concrete, with the water stopper positioned in the center of the joint groove before the concrete is poured. The concrete is then poured around the water stopper, encapsulating it and forming a secure seal. Alternatively, they can be retrofitted into existing joints by cutting a groove and inserting the water stopper.
5. **Applications**: Dumbbell-type PVC water stoppers are used in a variety of concrete construction applications, including:
   - Water Retaining Structures: Such as reservoirs, dams, water treatment plants, and swimming pools to prevent water leakage and seepage.   - Below-Grade Structures: Such as basements, underground parking garages, and tunnels to protect against groundwater infiltration.   - Infrastructure Projects: Such as bridges, culverts, and retaining walls to ensure the longevity and stability of the structure by preventing water-induced deterioration.
6. **Advantages**: Dumbbell-type PVC water stoppers offer several advantages, including ease of installation, resistance to corrosion and deterioration, compatibility with various concrete structures, and cost-effectiveness compared to traditional water stop materials like rubber or metal.