SENCTRL 0-100 Psi グリセリン液体充填低圧ゲージ、2.5インチダイヤルサイズ、1/4インチNPT下部マウント、ステンレススチールケース、ウォーターポンプ用、空気圧エア、ウェル、RVホース、CO2タンク、ガス圧力テスト。

Exactly what I needed! Good quality

Inexpensive and works well, didn’t really need the liquid filled but was thinking it would hold up better against rust, my old one rusted on the inside

I needed this for an ATV sprayer. They normally don't have a gauge, but someone had installed a non-filled gauge that was impossible to read because the needle vibrated back and forth with each pump discharge pressure pulse. This one is working fine so far.

Must have if using for well pump

Check the attaching diameter for proper size. I had to purchase a reducing bushing to attach. Now works great.