thermostats
This is the link to the Stat ifyou have the metal piston
http://www.showerdoc.com/gum-sk740013-sirrus-thermostat-(for-use-with-old-metal-piston)-sk740013
There is no way you can tellfrom the outside whether you have the plastic or metal piston, however withthis valve it is more likely that you have the metal piston
http://www.showerdoc.com/gum-parent-30-sirrus-rothwell-r995-antique
If you are replacing the statthen I would advise also fitting a service kit.
http://www.showerdoc.com/GUM-SK1500-1-Sirrus-Valve-Service-Kit-SK1500-1
Answered 12 years ago by The Shower Doctor
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