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It also includes a 1/8" NPT side port, commonly used for connecting an unloader valve to relieve pump pressure after shutoff. If your setup doesn’t require an unloader, the port can be securely plugged.
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.