Vacuum Regulator for small portable pumps 3/8 NPT - USA brass

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Replacement Vacuum regulator for small portable milkers up to 1 HP
3/8 NPT for easy mount.
Made of brass, stainless steel and nylon
Once you set the regulator, tighten the threaded brass ring to hold a stable vacuum level
replaces relief valve 3400018 VR38
Made in USA
Related items;
7121 valve with 3/4 NPT
7126 Glycerin filled vacuum gauge for portable pumps