| Author | Message | ||
| Douglas Tappan (Dougthebonifiedbusnut)
Registered Member Username: Dougthebonifiedbusnut Post Number: 107 Registered: 10-2004 Posted From: 24.218.65.24  Rating: N/A |
Hey Guys, In my crown I am going to put a d-box(tank) directly under my toilet, approx. 17 gallons. The kitchen sink, shower,vanity will dump into this tank . That tank will have an outlet so that when I am at a campground everything will exit at that box (tank)I am then going to need to pump that tank into the main holding tank about 4 feet away and pump from the bottom of the d- box to the top of the main holding tank. I want to use a masserating pump to do this.Question 1.Will the pump pull the waist up 14" for 4'? I say pull because I want the pump to empty that pipe into the main tank. Question 2. Can anyone turn me on to the probes I wiil need to tell the relay logic when to turn the pump on and off? | ||
| Sean Welsh (Sean)
Registered Member Username: Sean Post Number: 980 Registered: 1-2003 Posted From: 67.142.130.37  Rating: N/A |
Doug, Most sewage macerators for RV (or marine) use will lift up to 4' on the suction side. So no problem there. Detecting the fluid level in the tank is a bigger problem. There are perhaps half a dozen methods for detecting fluid levels, including floats, conductive probes, capacitive couplings, photosensors, and even a sonic system that essentially "pings" the surface level from above. FWIW, commercial sewage ejectors generally work off float switches in the sumps. Depending on how accessible the tank will be for maintenance, though, you might want to use a non-invasive method such as capacitive coupling; you will probably have to create the detection and timing logic yourself. -Sean http://OurOdyssey.BlogSpot.com | ||
| Jim Blumenthal (Jimblu)
Registered Member Username: Jimblu Post Number: 9 Registered: 11-2008 Posted From: 208.168.237.136 Rating: N/A |
I was able to fit a 30 gallon tank under the toilet in my Crown and sent all gray water to another tank. The senders in tanks can clog, I'd be careful trying to run a pump automatically from them. I found the grey tank filled faster than the black under those conditions and pumped it through the black to empty. A drawback to it was it was near the exhaust and would get hot and smelly climbing mountains in the summer. Insulate it well if it is near the exhaust! It is difficult to empty, flush, and deodorize with only a macerator unless the pump pickup is below the tank. My current bus (not a Crown, easier to change busses than replace the RTO 910 with an automatic, a different issue) has an air flush that avoids those issues, pumps through a small pipe to a remote tank, and works well. (Message edited by jimblu on November 29, 2009) | ||
| FAST FRED (Fast_fred)
Registered Member Username: Fast_fred Post Number: 1013 Registered: 10-2006 Posted From: 69.19.14.38  Rating: N/A |
""Most sewage macerators for RV (or marine) use will lift up to 4' on the suction side. So no problem there." As a boater I must disagree. They will suck 4 ft when brand new and if flushed to completely clear them after any use.Not practical in a coach. Most macerators will PUSH 4 ft if kept immersed so no suction is required. The "amp ratings" on pumps is a joke , at least #8 wire and a 30A CB will usually be required for a DC unit.. All of the above is for cheap $100 to $200 Jabsco and other rec boats. Get a Galley Maid or Obendorfer (about $800 to $1200) and things do change. The cheap AC pumps have a longer life than the DC units , but an inverter will be needed to boondock. "The kitchen sink, shower,vanity will dump into this tank ." Why? These will easily drain into a tank . 17 Gal of black could simply be JUST a black tank and should give good endurance with only toilet droppings . A sink garbage grinder will help , as it can eat stinky stuff like shrimp peelings. FF | ||
| Len Silva (Lsilva)
Registered Member Username: Lsilva Post Number: 327 Registered: 12-2000 Posted From: 72.187.35.208  Rating: N/A |
If you have 120 volts available all the time, then a submersible sewage pump is probably the simplest way. The Wayne 1/3 hp is around $200.00. http://www.acehardwareoutlet.com/%28gbb5mei5hincxx55ozvqgp55%29/ProductDetails.aspx?SKU=44 990 |