Holding tank

Holding Tank

The suggested solution demands a reorganizing of the accumulator batteries, which makes it possible to put the holding tank beneath the engine floor up towards the rear wall. Thus, locker isn’t occupied, which easily can be used for other purposes. Here is a look down into the engine room above the Holding tank.

The system build up in principle is seen below. There are three possibilities of pump out, vacuum pump out ashore through the 1½" threaded joint that already exists on deck, the electrical pump out directly to sea, or to a canister, to be discharged ashore.

Expenses amount to, besides a lot of working hours, approximately 2000.-Dkr.

Holding tank, list of parts.

1. Plastic tub,
     LxWxH 785xx480x300mm
2. Plywood 24x850x485mm
3. Laminated plastic 850x485mm,
    glued to the plywood.
4. Washer, stainless steel
5. Screw, stainl. steel, each 100mm
6. Sealant, non-drying
     (Sellotape IDL 0100)
7. Brass, 5/4" elbow pipe
8. Brass, 5/4" flush bushing

9. Brass, 5/4" sliding valve
10. PVC tube ø40x500mm
11. Inspection hatch, plastic
12. Plastic bushing for 5/8" tubing
13. Electrical pump,
(moved from fore toilet).
14. Stainless steel
(sauce dish or the like).
15. Ring or washers, stainless steel
16. M5x15 cap screw+nut, each 30mm.
17. 5m ø38 odour tight toilet tubing.

It is important that a non-drying sealant is used. Sealant that harden, can release its hold, and then you very easily have an odour problem. Furthermore it’s a bad idea, using ordinary tubing instead of special odour tight toilet tubing.
The system should also be supplied with a meter of a kind, to avoid over filling.