MAIN Manufacturing Products’ Gauge Port Adapters


One of the many useful adapters produced by MAIN Manufacturing Products, Inc. is the Gauge Port Adapter.  It is the easiest and quickest way to add pilot, sampling, or testing ports to a system.  Just place the adapter between the pad and the split flange/flange head, use 1" longer bolts, and you are done.  Run an auxiliary line, insert a gauge for testing, or insert a sampling fitting for fluid samples, in minutes.  Great for field troubleshooter.  Assemble a kit of the Gauge Port Adapter with gauge and 1 longer bolts.


Remember MAIN Manufacturing Products also has gauge ports as a standard option on their standard flanges.


Visit to see many of the stocked items.

Phone: (800) 521.7918   E-mail:  


Available in all Code 61 and Code 62 sizes with SAE O-ring, NPTF, BSPP, BSPT, and ISO 6149 ports of any size (ports larger than -4 or 1/4" may require bolts longer than 1” more).  They are stocked in ¼” – ¾” NPTF and BSPP and #4 - #12 ORB.

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