Posted on 2018年9月26日2020年6月24日 by zypcppump How to assembly back the valves when you fix or maintenance the Yongheng air pump Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Like this:Like Loading... Post navigationPrevious post: How to reset the digital displayNext post: Here is a recommendation of Yongheng compressor from our friend in CO2 Brazil