Go to NAPA, purchase Evercraft # 776-9089. Brake bleeder hose with a one way valve. Hecho en Taiwan. Best thing ever from that country.

Open bleeder, install nose, put other end in a catch can, gently pump pedal, keep master cyl from getting empty, flush it all out until clean fluid comes out. Remove hose and tighten bleeder. Do all 4 to flush the system. Don't need a helper.