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Fig 174 Test Valve

The NABIC Fig 174 is a flanged version of the Fig 55N. It is a robust gunmetal stop valve with a flanged boiler connection and stainless steel needle type valve and seat.

A dust cap protects the test gauge connection. The test valve is used on steam boilers , to provide a means for attaching a test pressure gauge to enable the calibration of the boiler gauge to be checked under working conditions.

  • Acts as an air vent, to facilitate draining and filling of the boiler
  • Protective cap for test gauge connection
Product Features +

Medium: Hot water, steam

Pressure: 17.5 bar

Material: Gunmetal

Temperature: -20 to 260°C

Connection: Flanged boiler connection. female gauge connection.

Pipe Connections

Flanged boiler connection. The following flange rating are available: BS EN 1092-3 PN16 and PN25. BS10 Table F and Table H. Gauge connection Rp 3/8" BSP female. To BS EN 10226-1


All valves are 100% production tested.


1 Body Gunmetal


Downloads +
Buy Online +

Fig 174 Test Valve

To order these products please call us on +44 (0)1462 443 278. 

Free delivery on orders over £400.

Part Number Size Ex Vat Stock Status More
£ 1,524.16 Call us +
Flanged Boiler Connection BS4504 & BS10 options available. G 3/8" Gauge connection to BS EN ISO 228-1 - Stainless Steel Seat

What our customers say

We had an existing NABIC Fig. 500 safety valve installed in our steam boiler factory which needed replacing. The valve had started to leak due to its old age.

I had no hesitation in purchasing another as it’s been a great product. I was very happy with the service of the website, as well as the prices. The fact the valves come with the necessary certifications is also great.

Wayne Barnes- Engineering Co-ordinator, Newlywed Foods

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