bath tap odd thread help needed

[chrisscammell]

I have got a beautiful pair of old victorian silver plated bath taps which I want to fit to my new bath. They came off an old cast iron bath.
Unfortunately I am struggling to find a tap connector to fit. The thread on the taps has an outside diameter of 30mm with a pitch of 175, 14 threads per inch. The internal diameter is 20mm with a dishing to accept an olive.

Can anyone suggest what thread size these are or where I might find a suitable tap connector or step down bushing.

Thanks
Chris

 

[buck51]

Have you tried a 3/4 tap connector

 

[Nige F]

Google BSPT

 

[chrisscammell]

Thanks for the replies. 3/4 is too small, 1 inch is too big. The thread doesn't match any british standard. I have tried all the local plumbing merchants, none of whom can help.

A local engineering workshop measured it and came up with the 30mm - pitch 175. I thought perhaps someone would have come across this size before. I have googled it endlessly to no avail. Any more suggestions appreciated.

Thanks
Chris

 

[picasso]

How much do you like your taps ?

http://www.antiquetaps.com/Product.aspx?pID=770

 

[chrisscammell]

Ha ha, not that much. Actually I've just found a different bstp chart which shows them as 7/8 inch. I'll see what I can find.

Thanks
Chris

 

[Charnwood]

YBFL. Most counter wallahs will think you are off your trolley.
7/8" fittings are available. We used to get them in for the water utilities.

I've got a feeler out. (Ooo errr missus!) Watch this space.

 

[JimCrow]

You could solder a cutting of copper inside the tap tails before mounting the taps and use a couple of pushfit unions.

 

[chrisscammell]

Yes I've thought of the soldering option. The inside diameter is approx 20mm so won't accept 22mm copper pipe. Is 20mm copper available or did you have something else in mind? I suppose 15mm might solder in with plenty of solder.

I've been googling 7/8 fittings and can only come up with JIC hydraulic fittings - whatever they are.

I'll keep watching this space. Thanks.

Chris

 

[Agile]

In France they use a selection of different sizes which all fit inside each other. Its very convenient!

They include 18 mm which is a very convenient size for many applications in both heating and water supplies.

So I expect they also have a 20 mm. Buying unusual sizes of tube in the UK is a bit harder!

I would turn a brass bush to match the tap to 15 mm tube! But then not everyone has access to a small lathe.

Tony

 

[JimCrow]

.

Ream the tail out ,

Here http://www.ebay.co.uk/itm/Silverlin...Home_Garden_PowerTools_SM&hash=item27b7a61452

 

[kevplumb]

.

Ream the tail out ,

Here http://www.ebay.co.uk/itm/Silverlin...Home_Garden_PowerTools_SM&hash=item27b7a61452

good call

I would turn a brass bush to match the tap to 15 mm tube! But then not everyone has access to a small lathe.

i have and a large lathe and a vertical miler along with a brierly drill and cutter grinder
working on getting them to get a shaper and surface grinder as well

 

[winston1]

In France they use a selection of different sizes which all fit inside each other. Its very convenient!

They include 18 mm which is a very convenient size for many applications in both heating and water supplies.

So I expect they also have a 20 mm. Buying unusual sizes of tube in the UK is a bit harder!

I would turn a brass bush to match the tap to 15 mm tube! But then not everyone has access to a small lathe.

Tony

Yes France has 20mm pipe. Solder that in and then solder French 22mm over it and finally a UK push fit. Trouble you'd have to do a Calais day trip and buy long lengths of pipe.

 

[chrisscammell]

Turns out that a refrigeration engineer I know reckons he can expand 5/8 pipe and then solder it in to the tap tail. I'll be back on here if it doesn't work. Thanks for all the great ideas.

Chris