Grand Banks Holding Tank Challenges
When dealing with holding tank problems on a Grand Banks, the most likely problem you will run into is a bad pickup tube. The original tubes and fittings were made from copper. In the picture on the right, you can see the deterioration and how the pickup tube has virtually corroded away.
It would be fairly easy to duplicate the fitting exactly, but what would be the sense when you know what is eventually going to happen to the fitting. You could build the whole assembly out of stainless, but it would be cost prohibitive. The optimal solution is to build it out of off the shelf PVC sanitation fittings. These are specifically made to work with waste and will not corrode or deteriorate over time.
If you want to go beyond the basic Grand Banks holding tank repair, one permanent solution is to replace your head system with a Raritan Lectra/San. The Lectra/San is USCG approved that treats the waste and discharges it on a flow-through basis, eliminating the holding tank.
Dickerson Harbor does holding tank work. We also upgrade Lectra/Sans to ElectroScan systems. The ElectroScan is a computer driven Type 1 MSD that is guaranteed to correctly and thoroughly treat and discharge to U.S. Coast Guard standards!
This is a wonderful product. It also is able to treat two toilet waste pathways with one unit. This reduces the total reliance on just the holding tank, which is still needed for “No Discharge” zones.