I am looking to buy compression fittings that will attach to a lead pipe but am a bit foxed by the sizes. For lead, pipe size is given by the weight of one foot length of the pipe. However, because the pipe is connected I cannot just hack a bit off and weigh it! Does anyone know the approximate external diameter of 5lb, 6lb, 7lb and 9lb lead?
I realise this query goes a bit further back than imperial/metric but here's hoping.