PLASSON 9055 25mm x 3/4" Brass Wallplate Elbow for MDPE pipe which is supplies as standard with polacteal split rings and NBR O -Rings which are suitable for water. Tested and approved by WRAS to PN16 - IMPORTANT NOTE, MOST PLUMBING PRODUCTS ARE STATED AS BSP IMPERIAL THREAD MEASUREMENT WHICH MEANS THAT ACTUAL DIAMETER OF THE THREAD SIZE IS APPROXIMATELY 1/4 INCH LARGER THAN THAT STATED IN BSP TERMS. FOR EXAMPLE THIS 3/4 INCH BSP THREAD ACTUALLY MEASURES APPROXIMATELY 1 INCH IN DIAMETER