BRAND: MARSHALL EXCELSIOR APPLICATION: REGO 3121 REPLACEMENTLIQUID LOADING / UNLOADING VALVEINLET: 3/4" FNPTOUTLET: 1-3/4" FEMALE ACME The ME450 Liquid Loading/ Unloading Valve incorporates a double O-ring seal on the stem assembly for leak free operation even under extreme temperature fluctuations. The double lead thread design of the stem allows adjustment from the closed position to full open in 6 full turns. The outlet boss on the side of the valve is tapped 1/4" FNPT and has a Vent Valve for your convenience. For use on tanks that do not have independent liquid withdrawal valves. Note: The ME450 does not require the use of adapters between the tank fill valve and the liquid loading/unloading valve. D FREE SHIPPING TO THE 48 STATES Feel free to ask us about conversion kits for almost anything including trucks, cars, generators, tractors, boats, motorcycles, RVs etc. We can build a kit to convert almost any engine! WARNING:This product can expose you to chemicals including Lead and lead compounds, which are knownto the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov. WARNING: This product can expose you to chemicals including lead and lead compounds, which are known to the state of California to cause cancer. www.P65Warnings.ca.gov. WARNING: These products contain a chemical known to the state of California to cause cancer and birth defects or reproductive harm. www.P65Warnings.ca.gov.