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Post by cathoderay on Feb 22, 2022 20:42:31 GMT
Any suggestions for a replacement for this valve, its on steel pipe. Cheers all  |
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Post by tomplum on Feb 22, 2022 21:17:07 GMT
there are transition couplings but, whatever way you do it will look a mess, If it was me, I'd drain down use a new valve with 1/2 inch FI thread, or convert to copper and join in a hidden place, under the boards or a void,  |
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Post by cathoderay on Feb 23, 2022 7:07:25 GMT
Cheers Tommy, no straight swap then. Bit of pipework alterations. No worries
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Post by crowsfoot on Feb 23, 2022 16:51:40 GMT
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Post by dickpuller on Feb 23, 2022 18:24:00 GMT
I agree with Tom, if you have little or no experience on MI pipework, cut the 1/2” pipe 300-600mm below the valve & cut a thread on it. 15mm x 1/2” Female straight & offset a bit of copper tube into a 15mm Valve.....Job done!!
You’ll need Hand Dies & cutting oil👍
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Post by cathoderay on Feb 23, 2022 22:24:09 GMT
Its 3/4 cf. "Close but no cigar" |
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Post by cathoderay on Feb 23, 2022 22:29:23 GMT
I agree with Tom, if you have little or no experience on MI pipework, cut the 1/2” pipe 300-600mm below the valve & cut a thread on it. 15mm x 1/2” Female straight & offset a bit of copper tube into a 15mm Valve.....Job done!! You’ll need Hand Dies & cutting oil👍 Thanks Mr P. I'll convert to copper under the floor as Tom says. I'll need to do something at the rad end as well. Would have been nice to find a straight swap. Lovely old rads, 1930's original. Haslam's Made in Alfreton, Derbyshire Cheers all |
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Post by tomplum on Feb 23, 2022 22:35:46 GMT
Ray, I think Tappy is right, according to your picture with the tape measure , the pipe is 3/4 and, that is 1/2 inch pipe so a valve with a 1/2 inch female iron thread would be the easiest option,  |
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Post by tomplum on Feb 23, 2022 22:41:19 GMT
Let me explain further, on iron pipework, the outside dimension of the pipe is NOT the Thread size, so a 3/4 pipe is a 1/2 inch male iron, that will fir a 1/2 inch female iron fitting, I know, i know , its not logical but, that is imperial measurements,  |
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Post by dickpuller on Feb 24, 2022 10:35:39 GMT
Let me explain further, on iron pipework, the outside dimension of the pipe is NOT the Thread size, so a 3/4 pipe is a 1/2 inch male iron, that will fir a 1/2 inch female iron fitting, I know, i know , its not logical but, that is imperial measurements, I can only add to my learned friends details; BSP threads have a 1/4” bigger diameter than the size. So with a 3/4” dia. It’s a 1/2” thread. 1” dia it’s a 3/4” thread……etc etc etc |
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Post by dickpuller on Feb 24, 2022 10:36:15 GMT
I agree with Tom, if you have little or no experience on MI pipework, cut the 1/2” pipe 300-600mm below the valve & cut a thread on it. 15mm x 1/2” Female straight & offset a bit of copper tube into a 15mm Valve.....Job done!! You’ll need Hand Dies & cutting oil👍 Thanks Mr P. I'll convert to copper under the floor as Tom says. I'll need to do something at the rad end as well. Would have been nice to find a straight swap. Lovely old rads, 1930's original. Haslam's Made in Alfreton, Derbyshire Cheers all Nice!! |
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