Measures against red rust water leakage in the air conditioning piping at Hilton Hotel Portsmouth, UK.
Case study of introducing NMR pipe protectors into hotel air conditioning piping.
The Hilton Hotel Portsmouth, located in the city of Portsmouth, is a five-star hotel that is globally renowned as part of the Hilton Group. Constructed in 1981, it has 120 guest rooms. Due to the use of galvanized steel pipes (SGP) for the air conditioning and hot water piping, the hotel faced serious issues with red rust deterioration and leaks after 25 years. Additionally, the red rust reduced the heat exchange efficiency of the air conditioning equipment, necessitating regular pipe cleaning. However, the cleaning process caused holes in the pipes, leading to further leaks. To stop the red rust corrosion and leaks in the air conditioning piping, an NMR Pipe Protector, a red rust prevention and prolongation device, was installed on December 9, 2005.
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Before the installation of the NMR pipe protector, the iron content in the hot water of the air conditioning piping due to red rust was 37.55 mg/l, indicating significant red rust corrosion. After 21 weeks of installing the NMR pipe protector, the iron content in the hot water of the air conditioning piping decreased to 0.292 mg/l, reducing the iron content in the water due to red rust to less than 1/100. Furthermore, after 22 weeks of installation, it was 0.276 mg/l, showing a significant reduction in the iron content in the hot water of the air conditioning piping. This demonstrated the rust prevention and pipe lifespan extension effects due to the black rust formation from red rust within the piping caused by the NMR pipe protector.
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~Extending the lifespan of old piping~ "NMR Pipe Protector" Cumulative installation record surpasses 4,400 buildings! (As of July 2025) Among them, over 3,100 buildings are condominiums. = Domestic Achievements = New Chitose Airport Domestic Terminal, JR Sapporo Station (JR Tower Building), Imperial Theatre Building (Tokyo Marunouchi), Yaesu Exit Hall, Famous Bookstore Building (Shinjuku), Hotel Toyokaku (Kyoto), Hotel Serve Shibuya, Shirakagi Care House (Saitama), Kawanishi Private Kushi Elementary School, Food Processing Factory, Major Automobile Manufacturer Factory (Fukuoka Prefecture), Kumamoto Red Cross Hospital, etc. = International Achievements = Buckingham Palace, London City Hall, British Museum, BBC, Christ's College, University of Cambridge, Royal Bank of Scotland, Harrods Department Store, Royal Garden Hotel London, UK Parliament, etc. ★ Featured in the Media "NMR Pipe Protector" ★ Selected as one of the top 10 rust prevention technologies in the world in 2020 and introduced in a U.S. magazine! Case studies and customer testimonials have been featured in many media outlets, including TV Tokyo's "World Business Satellite (WBS)", TOKYO MX's "Corporate Spirit", and specialized newspapers "Condominium Management News" and "Air Conditioning Times".