1. Easy quick and simple installation
2. The spiral is made of the original PVC
3. The interior of the siphon is smooth, which prevent the retention of dirt and odors
4. Nut and bolt are stainless steel
5. Sealing rubber is made of soft plastic,whitch unlike the rubber provides long-lasting durability
6. Resolve faulty in construction
7. Complete seal, witch was confirmed by certificate
