When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
The adjustable turn knob can be pulled out to unlock and adjust the pressure and once it is set you can press in on the knob and it will lock in place. This is a directional flow regulator & filter and it is marked IN on the inlet side and OUT on the outlet side showing what way the air needs to flow.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.