OneGuyFromBarlick

Exactly right Kev. I found it on page 24 of PE edition 1633. That's why I was expecting David to right on to it!
What's the next object?

What is it?

A sensor of some sort?

I suppose it is Kev, it detects a potentially catastrophic situation and alleviates it but I have never heard anyone describe it as that. Big clue, associated with steam boilers.....

Pressure relief valve?

In a way Kev but only as part of its safety function. Heat triggers it!

Part of it melts at an appropriate high temperature?

Sprinkler head?

Not a sprinkler head Kev but you and Peter are getting so close I am going to come clean and declare it a draw. It's a 'Fusible Plug' and is installed in the top of the firebox. As long as there is enough water to cover the crown of the firebox and therefore the plug, it remains intact but the core is made from an alloy that melts slightly above the boiling point of water so if the water level drops, the core melts before the crown has dried out and water and steam rush out through the plug into the firebox. This alerts the firebeater to the problem and at the same time damps or even extinguishes the fire.
Next for shaving?

What is it?

There's a deathly hush. If nobody breaks the silence I shall come clean.
(Is it too easy?)

Is it to do with a Fire Fighting Equipment/ Hose

Very close Cathy but not right. It puts a fire out!

Might it be a Nozzle for a Hose Reel

Part of a factory sprinkler system.

It's a nozzle in some ways Cathy. No Ian not part of the sprinkler system but you are all so close. You've seen it before...... (And not so long ago.....)
You're going to kick yourselves!

You are so close!!! Look at it again!

Well it puts fires out, I’ll try Water Spout

Cathy! You are so close! Look back at recent objects. I can't think of a better clue than that.....

Page 820. A fusible plug fitted internally in the crown of the firebox.

Well done Cathy, you persevered and got there in the end. Now we have to find another object!

What is it?

A finger stretcher for gloves?

Does the centre piece hold down fabric (for eg) while being cut. A pair of Tailor’s scissors maybe

Sorry, nobody is anywhere near....