Maple Expert Solutions (MES) Dolly 100 GPH with brand new MES membrane installed. Unit has always been rinsed and washed after use and stored in heated shop. RO has worked flawlessly but have outgrown it. I have an additional brand new MES membrane, new membrane housing, and all fittings to increase to a Dolly 225 GPH. Asking $2,500.00 as a 100 GPH unit or $3,200.00 for the additional membrane, housing, and fittings to make it a 225 GPH RO. Pick up only and additional pictures available.