![Caleffi 519600A Differential Bypass Valve, 1 in. NPT — New England Supply House spec card [NESH-SPEC-CARD-V2]](http://newenglandsupplyhouse.com/cdn/shop/files/nesh-519600a-card.png?v=1793998135&width=1946)
![Caleffi 519600A Differential Bypass Valve, 1 in. NPT specifications — New England Supply House [NESH-SPECTABLE-V1]](http://newenglandsupplyhouse.com/cdn/shop/files/nesh-519600a-specs.png?v=1793998136&width=1946)
Caleffi 519600A Differential Bypass Valve, 1 in. NPT
Caleffi 519600A Differential Bypass Valve, 1 in. NPT
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$251.26 USD
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$251.26 USD
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SKU:519600A
View full details![Caleffi 519600A Differential Bypass Valve, 1 in. NPT — New England Supply House spec card [NESH-SPEC-CARD-V2]](http://newenglandsupplyhouse.com/cdn/shop/files/nesh-519600a-card.png?v=1793998135&width=1445)
![Caleffi 519600A Differential Bypass Valve, 1 in. NPT specifications — New England Supply House [NESH-SPECTABLE-V1]](http://newenglandsupplyhouse.com/cdn/shop/files/nesh-519600a-specs.png?v=1793998136&width=1445)
The Caleffi 519600A is a differential bypass valve with 1 in. NPT connections that maintains minimum flow and protects the circulator in a hydronic heating system when zone valves close. It is a genuine Caleffi replacement part. Confirm the part number against your equipment's parts list before ordering.
Specifications
| Part Number | 519600A |
|---|---|
| Brand | Caleffi |
| Type | Differential Bypass Valve |
| Connection Size | 1 in. NPT |