Female Pipe to Valco Internal Adapters

female pipe to internal adapter

Female pipe adapters make a minimum volume connection from the male pipe fittings typically found in gas distribution plumbing to Valco zero dead volume internal fittings.

Standard material is 300 series stainless. Also available in Hastelloy C and titanium versions.

Description Bore Product No.
1/8" NPT female to 1/16" ZDV 1.0 mm FPZA21
1/4" NPT female to 1/8" ZDV 2.0 mm FPZA42L

Also available in other sizes by special order.

Pipe thread sizes

NPT, National Pipe Thread, is a standard developed a long time ago by people without rulers. 1/8" NPT is nowhere close to 1/8"! Measure the diameter of the fitting across the narrow end. You can also count the number of threads in a 1" section. Then look at the illustration below to determine the correct size needed. pipe fitting dimensions




Because of their dead volume and the risk of thread leaks, pipe fittings are a poor choice for trrace gas analysis. Thread sealants, particularly PTFE tape, cannot boost their performance to adequate levels. For trace gas applications, choose Valco zero dead volume fittings with gold-plated stainless ferrules.