SPARC Nitrogen Flow Indicator 1/4" SAE Flare Inlet and Outlet 50PSI


: In stock


The SPARC Nitrogen Flow Indicator provides extremely low pressure precision gas flow control for nitrogen purging applications during the brazing of copper tubing in Air Conditioning and Refrigeration systems. The nitrogen must be flowing to displace the oxygen inside the tubing during the brazing process, preventing internal oxidation and the resulting scale. Scale build up inside the tubing can cause blockage in the TXV and within the Air Conditioning and Refrigeration system resulting in premature failure.

The Nitrogen Flow Indicator uses a float ball to visually confirm the nitrogen is flowing and allows the technician to first flush the copper lines at 25-35 CFH and then reduce the flow to 3-4 CFH during the brazing process thus conserving and saving nitrogen. If the ball does not rise in the tube there is no flow of nitrogen only static pressure and oxygen is not being displaced. The maximum inlet pressure is 50 PSI and must be connected to a Nitrogen Regulator with 1/4 inch male flare outlet connection (SPARC SP00021 – Sold Separately) to control the nitrogen gas pressure. It is compatible with UNIWELD RHP400, RHP500, RHP750 and similar style regulators as well.

  • Nitrogen Flow Indicator, 1/4 Inch SAE Female Flare Inlet Connection, 1/4 Inch SAE Male Flare Outlet Connection
  • Provides extremely low flow / high precision gas control for nitrogen purging applications
  • 0-75CFH flow output @ 50psi.
  • Nitrogen Flow Indicator uses a float ball to visually confirm the nitrogen is flowing during the brazing of copper tubing in HVAC systems.
  • Over-Pressure Safety Relief Rupture Disk
  • 2 Year USA Warranty - Call, Email, or Text us any time!


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You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within 2 weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

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Our shipping cut-off time is 2:00 PM MST, M-F.
Most of our products are covered by a 2-year warranty against any manufacturing defects. It does NOT cover user damage or abuse. Please email to receive warranty service.
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