Around 1968/9-ish I was doing some improvements on a terraced house and I think it slightly pre-dated that. I do recall that 3/4-to-22mm conversion fittings were common at that time (I needed them), but they became more difficult to get hold of in subsequent years.
Read the full replyI believe that copper plumbing pipe changed from 1/2" & 3/4" to 15mm &
I assume it was a gradual changeover? Or was it "from this date"?
Around 1968/9-ish I was doing some improvements on a terraced house and I think it slightly pre-dated that. I do recall that 3/4-to-22mm conversion fittings were common at that time (I needed them), but they became more difficult to get hold of in subsequent years.
1970, ISTR. before my time, so I'm a bit vague on details.
I'd think (no information) that both types were stocked for a time since existing systems would have all been imperial and merchants would have dropped the imperial range as demand dropped.
The central heating system I installed starting in late 1971 maybe early
1972 was metric.
Our Laing-estate house was built in 1971 with Imperial size copper plumbing.
also of course you could buy the imperial pipes and fittings for quite a long time after metrication as well. These things tend to go slowly I find. Brian
I remember it. We had to bash 1" elbows onto the copper pipe. It was a f*ck up.
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