Brian Sharrock wrote:
BTW, the plastic is (IIRC) ABS.

Ta, Brian, I hadn't heard of it either, now noted for future reference.


IF (big if) it is ABS, then you could get an ABS to BSP adaptor. ABS is
used for some commercial pipe systems, mainly chilled water. You'd need
to get bits from a commercial pipefitting suppliers (e.g., BSS). The
main manufacturers are Durapipe and Georg Fischer. The pipe comes in
metric and imperial sizes; if there isn't a 17mm OD pipe fitting, you'd
have to find a man with a lathe to machine out a suitable fitting. The
pipe is solvent welded to the fitting and cannot be dismantled after
joining. You have to get the right solvent cement. Instructions &
catalogues can probably be found on the web.