

Ships same day if ordered by 12 pm
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 519502A is a differential bypass valve designed for industrial use. It features a graduated scale for precise flow rate adjustments up to nine gallons per minute. The valve has three-quarters inch NPT connections, ensuring compatibility with standard piping systems.
This valve provides effective flow control in systems with two-way zone valves, making it ideal for hydronic heating systems.
Thanks for subscribing!
This email has been registered!