Serrano Gray Water modification

[johnandanne]

I'm a relatively new owner of a Serrano 31x, 2011. So far I'm very pleased. I did have one surprise and I'm embarrassed I didn't notice this when I bought - although it wouldn't have altered the purchase. My rig has 2 gray water tanks with the dumps about 8 ft. apart. The gray water dump that combines with the black water dump services the bathroom sink and shower. The other, forward tank, services the kitchen sink. For now, I live with it and say, "hey, at least I have two tanks". Long term, I want to modify so I don't have to connect my drain hose twice each time I dump. I'm thinking of adding a small macerator pump to the isolated, "kitchen sink gray water tank" and running PVC pipe back to the other, combo drain. Theory is that I can electrically control the macerator pump to drain the one gray tank into the combo drain and connected sewer hose. The small macerator pump idea is used on the Itasca Reyo. It pumps the gray water over the rear axle and connects to the black water drain so I know in theory it will work. Any comments or better solutions?

[Rsanchez24]

Originally Posted by johnandanne

I'm a relatively new owner of a Serrano 31x, 2011. So far I'm very pleased. I did have one surprise and I'm embarrassed I didn't notice this when I bought - although it wouldn't have altered the purchase. My rig has 2 gray water tanks with the dumps about 8 ft. apart. The gray water dump that combines with the black water dump services the bathroom sink and shower. The other, forward tank, services the kitchen sink. For now, I live with it and say, "hey, at least I have two tanks". Long term, I want to modify so I don't have to connect my drain hose twice each time I dump. I'm thinking of adding a small macerator pump to the isolated, "kitchen sink gray water tank" and running PVC pipe back to the other, combo drain. Theory is that I can electrically control the macerator pump to drain the one gray tank into the combo drain and connected sewer hose. The small macerator pump idea is used on the Itasca Reyo. It pumps the gray water over the rear axle and connects to the black water drain so I know in theory it will work. Any comments or better solutions?

I had that same thing on my travel trailer I had. I just bought the separate pieces and made my own sewage line. Using the quick connect "y" I attached the one line to the single gray tank and the other to the further one that had the black and gray tanks in one drain , connected them each to the two connections on the top of the "y" then attached the single drain to the bottom of the "y" and off to the sewer line. Just make sure you get at least 2 sewer pipes that quick connect together to reach the furthest drain on your rig. This way you only have to hook up once to the sewer at the site or the dump station. Hope this helps. Below is the "y" I used and it worked just like a single drain.

[PatricksPC]

Originally Posted by johnandanne

My rig has 2 gray water tanks with the dumps about 8 ft. apart.

What I did was buy a 4" cover to a garden hose connection, My 4" elbow that goes into the sewage already had a garden hose connection on it (I had to knock out the plug in the center). So far it works fine as nothing large is put down the kitchen sink. If it is, it would be easy to clear out.

[anotherone]

I spent some time under mine and believe there is actually enough room to run the line to the rear dump line and tie it in. It would take patience and two people and someday I might feel frisky and do it.

[wa8yxm]

I have the same thing only farther apart and the front tank serves the kitchen and half bath, combines with the black tank, the rear tank the shower and main bath lav's only (The main bath has a macerator toilet and pumps it up to the front black tank)

I violate a rule.. What I do is use a 3/4" GRAY garden hose with the proper double female adapter to connect to the wash out "Inlet" on the sewere "Ground end" adapter on the hose. I leave the valve open and let hose form a trap. Seems to work great. (This is when I'm on a full hook up site)

Since we tend to use park showers (Better pressure and wife uses RV shower for storage) when I"m not on a full -hookup site,, I just let the tank fill, very very slowly.