Groco, Bronze In-Line Check Valve, CV Series

Mfr: Groco
$23.27 to $131.51
$23.27 to $131.51
May be used in water or fuel systems to keep pumps primed and to prevent back-flow in pressure systems. Unique design reduces flow turbulence and restriction, and improves pump performance. Cast bronze construction. NPT threaded ports.
Item #
Port Size
Maximum Diameter
Distance Across Flats
Distance Between Ports
Groco, Bronze In-Line Check Valve, 3/4"
Item #:531631-3/4"
Port Size: 3/4" NPT
Maximum Diameter: 1.65"
Distance Across Flats: 1.2"
Distance Between Ports: 2.58"
Weight: 0.5 lbs
Groco, Bronze In-Line Check Valve, 1/2"
Item #:531631-1/2"
Port Size: 1/2" NPT
Maximum Diameter: 1.42"
Distance Across Flats: 1"
Distance Between Ports: 2.45"
Weight: 0.4 lbs
Groco, Bronze In-Line Check Valve, 1"
Item #:531631-1"
Port Size: 1" NPT
Maximum Diameter: 1.9"
Distance Across Flats: 1.45"
Distance Between Ports: 3.3"
Weight: 0.8 lbs
Groco, Bronze In-Line Check Valve, 2"
Item #:531631-2"
Port Size: 2" NPT
Maximum Diameter: 3.63"
Distance Across Flats: 2.75"
Distance Between Ports: 5"
Weight: 3.2 lbs
Groco, Bronze In-Line Check Valve, 1-1/4"
Item #:531631-1-1/4"
Port Size: 1-1/4" NPT
Maximum Diameter: 2.38"
Distance Across Flats: 1.88"
Distance Between Ports: 3.98"
Weight: 1.4 lbs
1-1/2" Bronze In-Line Check Valve, CV-150
Item #:531631-1-1/2"
Port Size: 1-1/2" NPT
Maximum Diameter: 2.93"
Distance Across Flats: 2.23"
Distance Between Ports: 4.34"
Weight: 2.3 lbs

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GROCO will repair or replace, at its discretion, any part of any of its products which is determined to be defective by the factory or by an authorized GROCO service center within one year of the OEM installation date or the distributors original date of sale.


  • All returns must be recevied within 30 days of receipt of the order.
  • Manufacturer defects reported within 30 days of receipt will be supplied a pre-paid label for return shipping upon approval.
  • Please contact Go2marine LFS Marine and Outdoor for Manufacture Defects, Returns and help with Warranties.