Bristan Tulsa Thermostatic Mixer Shower
With the Sirrus 1800 series that in almost every occasion thefirst thing to do is give them a strip down clean and lube and fit a servicekit, this will cure 85% of any problems and it is also the cheapest thing todo.
If after servicing you find out that it needs a thermostat or piston,nothing is really lost because it almost certainly needed a service in anycase.
The 1800
http://www.showerdoc.com/sirrus-thermostic-cartridge-1850-968-sk1850-2
Answered 11 years ago by Anonymous
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