Threaded reducing bushes are available from stock in UPVC plastic, this includes long pattern (RE61) and short pattern (RB91) reducing bushes in sizes between 1/2" x 3/8" and 4" x 3" nominal bore all of which are available to order online for UK delivery. These UPVC reducing bushes all come with male BSPT taper and female BSPP parallel threaded ends in conformance with the BS EN 10226-1:2004 and ISO 7-1:1994, they're also rated for use at pressures of up to 10 bar (PN10) and temperatures between 0 - 60°C.
All of our UPVC pipe fittings, these threaded reducing bushes included, have been manufactured to the BS 4346-1 standard by Comer or Onyx.