Thistle Westminster Hotel

Located in Victoria, London, Thistle Westminster Hotel is one of the deluxe modern hotels with 134 guest rooms managed by Land Securities, a leading property company in the UK.

To protect the hotel’s hot water pipework, the hotel installed two Pipetector PT-75DS on its independent domestic hot water headers supplying hot water throughout the hotel.

24 days after the installation, water’s average iron content considerably decreased to 0.028 mg/ℓ from 1.463 mg/ℓ, and 0.0145 mg/ℓ after 35 days, and then to 0.01 mg/ℓ after 150 days.

The iron levels are all much lower than the British standard for drinking water set at 0.2 mg/ℓ. These results indicate Pipetector immediately terminated the new formation of corrosion inside the pipework and reduced existing corrosion into magnetite, which does not dissolve in water. Continuous use of Pipetector will protect the pipework from any internal corrosion as long as the building’s lifespan.

Installation Summary

Building	Thistle Westminster Hotel
Location	Buckingham Palace Road, London SW1W 0QT, UK
Profile	A hotel with 134 guest rooms
Installation date	January 5, 2007
Installation location, model and number	3-inch hot water supply pipe made with galvanized steel. PT-75DS × 1 3.5-inch hot water supply pipe made with galvanized steel. PT-75DS x 1

Change in iron contents in the hot water

	Before installation Dec. 29, 2006	After 24 days Jan. 29, 2007	After 35 days Feb. 9, 2007	After 150 days Jun. 4, 2007	British standard for drinking water
Iron content (mg/L)	1.65 (R101)	0.009 (lowest) (R101)	0.013 (R102)	0.016 (R101)	0.2
	1.52 (lowest) (R131)	0.057 (highest) (R130)	<0.007(lowest) (1st floor)	0.016 (highest) (R101)
	0.522 (R201)	0.019 (R210)	0.017 (R201)	0.008 (R210)
	2.16 (highest) (R231)	0.015 (R245)	0.021 (highest) (R229)	0.009 (R210)
	–	–	–	0.008 (R245)
	–	–	–	0.007 (lowest) (R245)
Average (mg/l)	1.463	0.025	0.0145	0.01