Homemade Check Valve with PVC and Innertube Rubber. Como Fazer Valvulas de PVC e Borracha.

This two-check-valve system is the main part of my hand-pump water pistol. Aprenda fazer valvulas para um sistema de bomba de agua.

Don't want to DIY it? Here are some inexpensive 3/8" check valves (affiliate link):
https://amzn.to/38u74fN

• #howto_style
• #check_valve
• #backflow_prevention
• #hand_pump
• #water_pump
• #valvula
• #bomba_de_agua