Compression Union Flared 15mm Male x 15mm Copper from Reece

15mm Compression x 1/2 BSP Male Iron Straight Adaptor

CB COMPRESSION MI TPR STR CON 15X3/4

B Press Fitting Procedure

Compression Union Flared 20mm Male x 20mm Copper from Reece

15mm x 1/2 BSP Copper End Feed Straight Male Union Adapter

Compression Union Flared 15mm Copper x 15mm Copper from Reece

Primaflow Brass Compression Reducer Coupling - 22 X 15mm

B Press Fitting Procedure

Buy Brass Flared Compression Fittings at Plumbing Sales

Wrot Copper DWV Fittings