The following table details the recommended torque values for fasteners and components in a Hydronit system:

General

• M5: 4-5.5 Nm (35-49 lbf·in )
• M6: 8-10 Nm (71-89 lbf·in)
• M8: 16-20 Nm (142-177 lbf·in)
• M10: 30-40 Nm (266-354 lbf·in)
• 3/8-16 UNC: 30-40 Nm (266-354 lbf·in)
• 5/16-24 UNF: 16-20 Nm (142-177 lbf·in)

Pumps

• M5 for pumps gr.0.5: 8-9.5 Nm (71-84 lbf·in)
• M8 for pumps «G» and «K» type gr.1: 21-25 Nm (186-221 lbf·in)
• M8 for pumps «H» type gr. 1: 31-35 Nm (274-310 lbf·in)

Relays

• Relay’s electric poles 5/16-24 UNF: 5 Nm (44 lbf·in)

Tanks

• M5 for plastic tank: 0.3-0.4 Nm (2.66-3.54 lbf·in)
• Metal tank’s plugs 1/2 BSP (ISO 228): Max 10 Nm (89 lbf·in)
• Plastic tank’s plugs 1/2 BSP (ISO228): Max 10 Nm (89 lbf·in)
• Steel clamp band for plastic tank neck: 2.1-2.5 Nm (18.59- 22.13 lbf·in)

Valves and Plugs

• Valves and plugs 1/8 BSP: 12-15 Nm (106-133 lbf·in)
• Valves and plugs 1/4 BSP (ISO 228): 15-20 Nm (133-177 lbf·in)
• Valves and plugs 3/4-16 UNF: 25-30 Nm (221-266 lbf·in)
• Valves and plugs M18x1.5: 30-35 Nm (266-310 lbf·in)
• Relief valves M20x1.5: 50 Nm (443 lbf·in)
• Relief valves M14x1: 15-25 Nm (133-221 lbf·in)
• Valves and plugs 9/16-18 UNF: 6-20 Nm (53-177 lbf·in)
• Valves and plugs 5/8-18 UNF: 15-25 Nm (133-177 lbf·in)
• Valves 7/8-14 UNF: 45-55 Nm (398-487 lbf·in)

E10103010 EBP Flange

• M6 for E10103010 flanges: 6 Nm (53.1 lbf·in)