Sirrus Ts 1600 Thermostatic Shower Valve

A: You can try pouring hot water over the valve body which may help. The two holes are just aligning holes.

A: http://www.showerdoc.com/shower-spares/sirrus-by-gummers/mixer-showers/gum-sk1600-1-sirrus-seals-kit-sk1600-1

Try servicing it first with the above kit.

A: If these cartridges are not greased on the threads before fitting they can be very very difficult to remove. A good set of foot prints or large adjustable and a steady pressure is all that you can do.

A: 

Strange!

 

Couldsomething inside the valve be sticking?

 

 

Thefirst thing that comes to mind is you mention that the water is very hot if thewater temperature is over 65°Cthis will wash the silicon lubricant off theparts.

 

Thepart that is important to grease is the piston not the thermostat (just to makesure that we are talking about the correct/same part)

 

Myonly other thought is when it is not running hot in the morning can you gethold of the inlet pipe on the hot side of the valve and feel what thetemperature of that pipe is?

A: 

It is good for 10bar static which is way more than you will get from any pump.

 

If it is dripping it would suggest that it needs a service kit.

 

http://www.showerdoc.com/shower-spares/sirrus-by-gummers/GUM-SK1600-1-Sirrus-Seals-Kit-SK1600-1-(Components-Identified-as-A)

 

A: To g`tee a cure you need to fit a new cartridge which can be ordered online by clicking on the link below.

http://www.showerdoc.com/shower-spares/sirrus-by-gummers/GUM-SK1600-2-Sirrus-Cartridge-Assembly-(no-Thermostat)-SK1600-2

A: It is not necessary to remove the unit as the entire internals can be removed from the front of the valve.
If you click on the link below it will take you to an exploded view of the 1600 which should be of help, you can also order any parts required online via the same link.
When reassembling remember to libricate with silicon grease.

http://www.showerdoc.com/shower-spares/sirrus-by-gummers/GUM-PARENT-46-Sirrus-Ts-1600-Thermostatic-Shower-Valve

A: Would suggest fitting a seal kit which can be ordered online by clicking on the link below.

http://www.showerdoc.com/shower-spares/sirrus-by-gummers/GUM-SK1600-1-Sirrus-Seals-Kit-SK1600-1-(Components-Identified-as-A)

A: 

See if you can get hold of the hot supply pipe before it enters the shower or perhaps as it leaves the boiler.

 

If when holding this pipe the temperature fluctuates or goes cool then the problem is not with the shower but more likely with the boiler as the shower can only deliver what the boiler sends to it. If this is OK then the most likely problem is that the Piston is sticking you need to remove this make sure that it is clean and then give it a good smear with silicon grease.

 

Here is the link to the Grease.

http://www.showerdoc.com/plumbing-consumables/MCSILICONE-Silicone-Grease-Tub-30ml