Alpha Systems (VB22548H 22″ x 54″ x 8″ Holding Tank

This tank was installed on a 1973 Prowler.The model only came with a blackwater tank and I needed to retrofit this for boondocking.This tank fit perfectly between the frame and the cross members with a custom support bracket.By using 2 inch angle iron it was easy to make a support frame that spanned between the frame beams and tucked it up under the belly.Measured carefully, welded, primed, painted it and used 4 bolts through the frame to attach the support frame and cradle the tank.The support frame ended up looking like a small bed frame.The lip on the tank to hang it has 3 inch of height, which fit well under the belly in the depth of the 4 inch tall pocket made by the frame c beams.I centered it left to balance weight of water and to give plenty of room for pipes and bulkheads.Using ICON 12483 Holding Tank Fitting – 1-1/2″ Rubber Grommets I made an inlet for waste water from sinks and shower and an inlet for a one way Studor 20346 Redi Vent (this is so when the tank is drained the rushing vacuum created pulls air from the vent so it doesn’t suck the water out of the pea traps on the drains)Using a Valterra T1041-1 Eccentric Tank Reducer I plumbed the drain to a gate valve and the on to the wye that connects to the dump connection drain hose fitting.This tank and its construction meant that I was confident the time and materials needed to make this upgrade were well worth it.It has dimples for installing sensors if I want to add a meter inside to monitor levels, which I will do next year.Thick, consistent walls, durable and true square dimensions mean I wouldn’t hesitate if you think you would like to upgrade your vintage trailer.