Gray Water & Sewer Drainage

[Sand D]

I have a HW296.
Any suggestions for attaching the gray water drainage to the sewer drainage, so that you don't have to keep switching out at the campsite.

[Ford Idaho]

Just guessing here.

You have two gray tanks and one black tank one gray has it's own dump connection, right?

If so and you are using a Rhino or similar type hose.

https://www.google.com/webhp?hl=en#h...o+sewer+hose+y

[Sand D]

Yes of course I meant gray vs. black. Yes we have the rhino system for the black.

[Ford Idaho]

Are you using one hose for black and another one for gray?

[OldCoot]

If you have the where with all, you can permanently hard plumb the back tank to the forward tanks. Takes about 4 hours and $25 worth of pvc pipe.

[txredfish]

If you have 2 grey tanks and 1 black tank. You can purchase a connection at the sewer inlet that has an additional water hose fitting. Also will need a fitting/cover at the camper grey water outlet. You can then use a standard water hose (not a white fresh water) to connect at the camper cover and the sewer inlet fitting. You can also use the "Y" fitting as Ford Idaho suggested. You would have to purchase or make up three sewer hoses. One sewer hose from camper grey water outlet to "Y", one hose from camper black water outlet to the "Y" and another hose from the "Y" to the sewer inlet fitting. Both methods work. For both methods, when at the destination, you would leave the grey water tanks open, but close the black water until 3/4 full. Close the grey water camper outlets prior to dumping.

[txredfish]

Oldcoot,

I like your suggestion. Much better. But how did you connect both ends, black tank to forward grey tank? Did you cut holes in the side of both the size of pipes (3 inch), then glue pipes in? Please explain in detail? Could the grey tank be plumbed to back black water tank? Thanks ................

[Sand D]

We just have one grey water tank, and one black.

[bikendan]

OP has a popup, so only one of each.

[OldCoot]

Originally Posted by txredfish

Oldcoot,

I like your suggestion. Much better. But how did you connect both ends, black tank to forward grey tank? Did you cut holes in the side of both the size of pipes (3 inch), then glue pipes in? Please explain in detail? Could the grey tank be plumbed to back black water tank? Thanks ................

Cut a 1-1/2" hole in rear galley tank discharge tube and glued a pvc pipe into it and ran it forward into the front black/grey tank discharge pipe with a shutoff valve in between.

[vinmaker]

Hello Sand,

Welcome.

Unfortunately the only way to accomplish your goal is to hard plum the grey discharge pipe to the large 3" black discharge pipe. You will need to do this behind your large black valve.

What many of us have done is screw a 1 1/2" to 3" expander PVC pipe to the 1/ 1/2" grey discharge pipe. What this enables us to do is disconnect the rhino hose from the black 3" connection and then put the sewer hose on the grey adapter. Then you pull the grey and it cleans the hose and flushes the grey.

Not the best solution but a pretty good workaround if you do not want to start cutting into your existing PVC.

There are threads on here that show the adapter we made.

Vin.

[vinmaker]

Try looking this thread over.

http://www.forestriverforums.com/for...tup-65485.html

Vin.

[wbdavey]

Originally Posted by Sand D

I have a HW296.
Any suggestions for attaching the gray water drainage to the sewer drainage, so that you don't have to keep switching out at the campsite.

Sand D - I may be the only one that's confused, but please clarify what you're trying to do. It's not a good idea to cross connect the black and gray tanks, you'll end up with crappy water in both tanks. Let us know a little more about what you mean by "switching out at the campsite".

[OldCoot]

The whole point of cutting into the existing pvc is to eliminate having to carry other hoses, connections and hooking stuff up every time you want to dump. Just do it one time and it's finished. Mine has worked flawlessly for over 3 yrs and I only carry hoses for hooking up to the cg sewer.

[vinmaker]

Originally Posted by wbdavey

Sand D - I may be the only one that's confused, but please clarify what you're trying to do. It's not a good idea to cross connect the black and gray tanks, you'll end up with crappy water in both tanks. Let us know a little more about what you mean by "switching out at the campsite".

That is a good point that needs to be expanded.

If you contemplate doing as OldCoot suggests, then you need to make sure that each tank is separated by a cutoff blade valve so that the contents from individual tanks do not mix.'

This may have been obvious but I just wanted to make that clear.

Vin.

[OldCoot]

All 3 tanks have their own shut off valves. The black tank and grey tanks have the factory valves and I added one to the galley tank. Each tank can empty individually. There is no cross contamination even tho' I really see no real alarm even if there was.
As for the switching out, before I made the change, I would have to switch the slinky from the black/grey tank to the galley tank which is under the slide. Now I can dump individually, 2 at a time or all 3 at once without moving the slinky.

[2gwright]

It is very simple to replace the black tank valve with a dual valve
and run a short pipe from the gray tank valve location to the new valve.

see my post about what I did here:
http://www.forestriverforums.com/for...tml#post812543

only used once this year but it worked great. pull the lever for the black,
then pull the lever for the grey to rinse the Rhino. One hook-up and one
size hose. And no cross contamination. Mod was less than $50 and took
about 45 minutes start to finish.

here is a link to the valve I bought from amazon:

Robot Check

[avengence]

Originally Posted by 2gwright

It is very simple to replace the black tank valve with a dual valve
and run a short pipe from the gray tank valve location to the new valve.

see my post about what I did here:
http://www.forestriverforums.com/for...tml#post812543

only used once this year but it worked great. pull the lever for the black,
then pull the lever for the grey to rinse the Rhino. One hook-up and one
size hose. And no cross contamination. Mod was less than $50 and took
about 45 minutes start to finish.

here is a link to the valve I bought from amazon:

Robot Check

Literally THE BEST way to do it. It took roughly 2 hours to do everything from start to finish, including getting the stuff at the store. Valve cost 40 from amazon and about 15 in glue and pipe from home depot. Went together smoothly and doesn't leak. This allows you to rinse out the sewer line after each black water drain. It also allows black and grey water to be totally separate systems.