Marshall Excelsior MER-253HP-PT15 2-Stage Regulator 253Hp With

Specifically designed to meet the demands of today's motorhomes and trailers. Our new MEGR-253H Excela-Flo Auto Changeover paired with the MER425H Series High Flow Type I 400,000 BTU (red nut) pigtails are designed for those applications that require more then 200,000 BTU's. The new High Flow pigtails are designed with the excess flow and thermal link safety features, same as the green nut Type I.