

Manufacturer pricing rules prevent us from advertising our discount — no account or email required to see it.
Secure Payments
Easy Returns
Expert Advice
Fast Shipping
The CALEFFI 519566A Differential Bypass Valve is a mechanical component designed for hydronic systems. This 3/4" press fit valve, constructed from brass, regulates differential pressure to ensure balanced flow and prevent excessive pressure buildup. It is suitable for industrial and scientific applications requiring precise control within process systems.
Essential for maintaining balanced flow and preventing pressure imbalances in heating and cooling systems.
Thanks for subscribing!
This email has been registered!