Feature: 1. Prevent Siphoning: The stainless steel anti siphon loop valve can effectively prevent water from siphoning from the pipeline loop. 2. Universal Application: Marine grade vented loop is perfectly suitable for toilets of ships, yachts and motorhomes, high performance. 3. Practical Part: Vent loop valve is an essential safety component on all inlet and discharge plumbing of toilets installed below the waterline. 4. High Strength: Siphon vented loop is made of 316 stainless steel, chemical resistance, rustproof, not easy to crack, has long use time. 5. Stable Construction: The anti siphon loop is hand polished, 25mm/1in pipe diameter, high reliability, rugged structure, very strong and durable. Specification: Item Type: Vented Loop Material: 316 stainless steel Tube Diameter: Approx. 25mm/1in Application: Suitable for ships, yachts and motorhomes. Package List: 1 x Vented Loop