How do I reduce from 12mm to 8mm without using several joints.

[Paul Alone]

I'm building a steam punk clock and am using a thermometer pressure gauge as one of the parts. What I need to know is how can I plumb to the rod extending from the pressure gauge without using several parts. The rod diameter is 12mm and I will be using 8mm copper piping for the project throughout. I have tried everywhere for a reducer but no one does one in the size that I need. Would the only alternative be to fit a 15mm to 8mm reducer which is freely available? If so what could I use to pack out the extra space?

 

[ShaunCorbs]

Option 1

BES.co.uk | Next Day Delivery On 15,000 + Plumbing Supplies

Order UK straight couplers and other UK compression fittings online at BES.co.uk. Low Prices, Free Next Day Delivery Available, 15k Plus Products in stock. P/N: 6709

www.bes.co.uk

Option 2

BES.co.uk | Next Day Delivery On 15,000 + Plumbing Supplies

Order end feed fitting reducers and other pipe fittings online at BES. Low prices. Free next day delivery available. 15k+ Products in stock. P/N: 7180

www.bes.co.uk

Required for option 2 BES.co.uk | Next Day Delivery On 15,000 + Plumbing Supplies - https://www.bes.co.uk/end-feed-straight-coupling-12mm-f-x-f-6767/

 

[Robooo]

Manual Copper Pipe Tube Expander Hand Expanding Air Conditioner Swaging Tool UK | eBay

Find many great new & used options and get the best deals for Manual Copper Pipe Tube Expander Hand Expanding Air Conditioner Swaging Tool UK at the best online prices at eBay! Free delivery for many products.

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Maybe enlarging the pipe with a flearing tool or similar.

 

[Paul Alone]

Thanks for the help guys it seems the luck of the draw having someone who is based nearby. I was all over ebay, B&Q, screwfix and wickes and no one had what I needed. Think I can manage now.