... quality, good looking, long service It is double female thread plastic ball valve, available size: 20mm, 25mm, 32mm.“Seher” PP-R ... Heat preserving and energy conserve: heat conduction index is 1/200 of the metal pipe’s, effective in heat ... 5, Light, high pressure resistance: the weight is just 1/8 of that of metal, it can bear 5MPa ... in 50 years or longer. double female thread plastic ball valve