Hypro GS40GI Control Unit/Regulator Category_Pumps/Electric •Port Sizes: 1-1/4" (M) hose

•Port Sizes: 1-1/4" (M) hose barb inlet

When looking at the oil sight glass side of the pump it will be the black cover to your right

case cover

It is the lawn care industry standard

All of the features of the original JD9-C spray gun

Hypro GS40GI Control Unit/Regulator Category_Pumps/Electric •Port Sizes: 1-1/4" (M) hoseSince the Hypro 9910 GS40GI regulator shares the same specifications as the AR GIC40 Regulator, with the exception of the seat material (GS40GI uses a viton valve seat, while the GIC40 uses a ceramic valve seat), it can be used on the Annovi Reverberi AR 30, AR 40, AR 50, AR 303, AR 403, AR 503 diaphragm pumps. Both regulators are interchangeable with one another.