Dump valve

[kyle4501]

http://www.adventurerv.net/waste-valve-wmetal-handles-p-9594.html


Or look for something like  --  Valterra T1029-2 RV Sewer Waste Valve Termination Adapter 3" Bayonet x 3" Hub

[chessie4905]

Is that an aluminum tank?

[sledhead]

because you have only 1 waste tank you could use a laundry pump 2 " in and 2 " out and pump it any were to the dump tank

I use this setup and I can drain my black tank 58 gal. and grey tank 125 gal  very fast and up hill if needed . I use a fire hose style hose that rolls up when finished . my toilet is a head hunter that blasts water right in the toilet drain pipe so there is no large stuff going into the tank  





looks like I need another place to resize my pictures then this crap from photobullcrapbucket

and if need be I can remove the system and use the old 3 "slinky if I really really have to

dave

[eagle19952]

because you have only 1 waste tank you could use a laundry pump 2 " in and 2 " out and pump it any were to the dump tank

dave

pump make and model. source ?

[richard5933]

Is that an aluminum tank?

No. It's an early version of a polypropylene tank. Matching set - fresh and black are same size. Seem to be in good condition so I'm inclined to leave them alone for now.

I did find an adapter at a local RV store today. It goes from 3" pvc to a standard bayonet mount. Now I've just got to find a reduction bushing to glue into it to reduce the opening to the 2" MPT that's one the cast iron. Let's hope this works.

Richard

[sledhead]

pump is like this but mine has a 2 " in and 2 " out outlet

http://www.homedepot.com/p/AquaPro-1-3-HP-Utility-Sink-Pump-55011-7/206852252

works great

sorry about the pictures and photo crap

dave

[richard5933]

I picked up a glue-on bayonet fitting today. It's designed to go on 3" pipe. Also bought a reducing bushing and some appropriated sized PVC fittings, all in the hopes of replacing the downward-facing 2" cast iron nipple with the PVC & bayonet fitting. If all goes well, then it shouldn't hang down any lower than current setup. It seems that since I'm using PVC/ABS for the bottom portion, worst case scenario it becomes the weak link and snaps off if it hits something. It seems better to have the break below the floor in the plastic pieces rather than the cast iron parts above. The actual dump valve is so far inboard that I'm not worried about it.

I'll post photos once it's together.

Richard

[eagle19952]

pump is like this but mine has a 2 " in and 2 " out outlet

http://www.homedepot.com/p/AquaPro-1-3-HP-Utility-Sink-Pump-55011-7/206852252

works great

sorry about the pictures and photo crap

dave

Thank-you, all i could find for laundry pumps were submersibles

[chessie4905]

There were several posts a couple years ago about using a garbage disposal connected to a garden hose to empty holding tank. Was reported to work quite well and disposals just happen to have 3 inch inlets which easily facilitates connection to dump valve with short hose and adapter. I saw that one of the RV supply companies make something similar at much higher price point.

[richard5933]

Was easier than I thought

Richard
1974 GMC P8M4108A-125 (Current bus)
1964 GM PD4106-2412 (totalled Sept 2017)
Located in beautiful Wisconsin
KD9GRB

[kyle4501]

Was easier than I thought

You are 'The MAN!'
Great solution!

[richard5933]

Another interesting thing I noticed...

The electrically operated pneumatic dump valve works amazingly well. Also had better than expected flow from just a 2" pipe. There was about 6 inches of blue water in the black tank (looks like someone really overdid the chemicals and tried to 'clean' the tank) and it flowed out before we knew it. I'm hoping that if we keep enough liquid in the tank the solids should flow out pretty well. In case they don't, I'm replacing the clean-out plug in the "T" fitting (see photo in earlier post) with an adapter & backflow preventer so that I can hook up a garden hose to flush out the dump valve and cast pipe without having to open anything up.

[RJ]

Richard -

As you said, not as difficult as you thought it would be.

You might want to consider substituting one of these for that orange connection to the coach adapter:

https://www.amazon.com/Valterra-T1026-1-45%C2%B0-Clearview-Adapter/dp/B000NCS7GE

I've found it works much better to slide my "slunky" under to get a nice smooth flow to the dump receptacle:

https://www.amazon.com/Level-Trek-LT80070-Sewer-Hose-Support/dp/B008OJ5H9I/ref=sr_1_5?s=automotive&ie=UTF8&qid=1508652109&sr=1-5&keywords=rv+sewer+hose+support

Then one of these at the end of the hose into the receptacle:

https://www.amazon.com/Camco-39736-RhinoFLEX-Bayonet-Fitting/dp/B01N5H2FCE/ref=sr_1_1?s=automotive&ie=UTF8&qid=1508652410&sr=1-1&keywords=camco+clear+sewer+elbow

FWIW & HTH. . .

[richard5933]

RJ - I had thought about that but hadn't had a chance to look on Amazon yet. It would certainly make a straighter run for the hose. I've already got the 90-deg bend on the far end. Thanks for the link.

[chessie4905]

I don't know how far that sticks down below body, but it looks like an accident waiting to happen some day. Like going over humped road or railroad tracks or going in or out of uneven ground at a rally. Other than that, good work around. I prefer drain outlet at bottom inside of compartment with a horizontal outlet.