New Scamp 13 sink in bathroom not draining. - Fiberglass RV


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Old 09-24-2018, 05:23 PM   #1
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New Scamp 13 sink in bathroom not draining.

OK now I am having a problem with the sink in bathroom and shower not draining. I said previously that the filter was backwards and I did clean it.

It would seem to me that I have an air lock preventing the pump from moving water. Should there be some type of air vent off the water drain line to allow the water to run down the drain hose. I removed all connections from the trap under the sink to check for blockage, none. The water just sits there in the bowl.
Normally in a house there is a vent stack to allow atmospheric pressure to allow water to drain freely. Not in this setup. Am I missing something????
HELP!!
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Old 09-24-2018, 06:54 PM   #2
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After the filter had been cleaned many times, we suffered the same symptom. Turns out that the upstream side of the drain tubing, at the filter, had hair backed up enough to block the flow.
I removed the filter and used s needle nose pliers to remove the clog. It looked like I was extracting a mouse from the line. Good news is that it took about ten years to accumulate with relatively heavy use.Once you remove the clog, rinse the drain before reinstalling the filter.
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Old 09-24-2018, 07:19 PM   #3
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Hi Floyd,


Problem is this is a brand new 2 week old Scamp 13. Its has to do with air blocking the water flow to the pump, its as if I have to prime the pump to remove the trapped air. I am working on that theory.
I have loosened the filter housing slightly to get the water to flow down from the sink to rid the trapped air. Will just have to check it out.
Thanks for your reply.
Jack
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Old 09-24-2018, 07:31 PM   #4
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While you are at it, you might consider moving the pump to the raised area under the toilet. I have seen too much damage to pumps left in the stock location under the shower pan.

Check in the closet for a kink in the drain tubing. also check for a kink in the line from the pump to the gray tank. Also check the vent line on the gray tank...It can't take water if it can't vent.


Disconnect the downstream line from the pump and turn on the pump to be sure it works.



Oh!! All this assumes that the pump is a fullsized pump like the one for the fresh water.

It should be known that the pump will likely shut off when a certain downstream pressure is met, just like the fresh water pump.
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Old 09-25-2018, 09:52 AM   #5
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Thanks Floyd,

Moving the pump will have to wait until I get back to MA, am presently in Kansas.
I think that it may be working now that I seemed to have removed the trapped air, time will tell. All the lines are ok no kinks.
Thanks,
Jack
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Old 09-25-2018, 10:07 AM   #6
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While you are at it, you might consider moving the pump to the raised area under the toilet. I have seen too much damage to pumps left in the stock location under the shower pan.

Check in the closet for a kink in the drain tubing. also check for a kink in the line from the pump to the gray tank. Also check the vent line on the gray tank...It can't take water if it can't vent.


Disconnect the downstream line from the pump and turn on the pump to be sure it works.



Oh!! All this assumes that the pump is a fullsized pump like the one for the fresh water.

It should be known that the pump will likely shut off when a certain downstream pressure is met, just like the fresh water pump.
I am a little confused. You are talking water not draining out of the sink. You are talking about a pump to drain it. Do you have a pump to drain the sinks? Shouldn't the water just flow out of the sink like in your house. Ours does in our Casita. The only pump we have is to run water to the faucets and toilet.
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Old 09-25-2018, 11:01 AM   #7
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I have two sinks, the kitchen sink and the optional sink in the bathroom. Its the bathroom sink that I have a problem with. The kitchen works ok. The bathroom sink seems to trap air in the drain line and the water sits trapped on top of the air.

Both sinks have pumps to move the water to the holding tank. Hope that answers your question.


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Old 09-25-2018, 06:30 PM   #8
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I have two sinks, the kitchen sink and the optional sink in the bathroom. Its the bathroom sink that I have a problem with. The kitchen works ok. The bathroom sink seems to trap air in the drain line and the water sits trapped on top of the air.

Both sinks have pumps to move the water to the holding tank. Hope that answers your question.


Jack
Why not just have vents instead of pumps to drain the water into the holding tank like all other RV's? Seems that having a pump is just more things to go wrong. I know it's not your idea but maybe you could put vents in instead.
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Old 09-25-2018, 06:45 PM   #9
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I have two sinks, the kitchen sink and the optional sink in the bathroom. ...

Both sinks have pumps to move the water to the holding tank. Hope that answers your question.

..
I am quite sure that the kitchen sink does not have a pump for the gray water drain.

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Originally Posted by Jann Todd View Post
Why not just have vents instead of pumps to drain the water into the holding tank like all other RV's? Seems that having a pump is just more things to go wrong. I know it's not your idea but maybe you could put vents in instead.

Jann.. this is a Scamp kludge. The floor under the shower is too low for a gravity drain so they add a pump. Yes, its not ideal... kinda like the difference between a gravity feed septic system and one with a pump. The pump adds complexity and maintenance but on some home sites there is no other way to get a working septic system.

I'm not clear if the sink has a separate line to the gray water tank or does it go through the pump with the shower drain.

BTW, the kitchen sink is literally 3 feet away.. why even have a bathroom sink? I have heard people talk about cross-contamination when washing hands in the kitchen sink but IMHO that is not a concern. It sure has not been for me.
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Old 09-26-2018, 08:16 AM   #10
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My 2018 scamp kitchen sink drains to the tank w/o a pump. Their is a pump for the shower drain . I do not have a sink in my bathroom.
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Old 09-26-2018, 07:42 PM   #11
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Jann & Gordon you are correct about the kitchen sink, its gravity flow.



I just discovered that that switch on the side of the sink is for the demand pump to pump water from the 12 gal.fresh water holding tank, located underneath the right side bunk.



I'm learning here. Sorry for the confusion.


I had gone back to the Scamp factory 3 days after I picked up the Scamp to have something corrected and I must have misunderstood the purpose of the switch located at the kitchen sink.



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Old 09-26-2018, 08:05 PM   #12
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My 2018 scamp kitchen sink drains to the tank w/o a pump. Their is a pump for the shower drain . I do not have a sink in my bathroom.
It is weird to have a pump to pump out the shower drain. If the holding tank is even an inch or two below the floor it should not need a pump. Is the pump to dump the gray water tank? We have a handle to pull to let the shower drain and that handle pulls a cover on and off of the drain. The idea of the cover is to keep the water in the holding tank from splashing back into the shower when traveling. The holding tank is just below the shower. Water flows down with no problem even if the tank is directly below the drain.
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Old 09-26-2018, 08:15 PM   #13
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It is weird to have a pump to pump out the shower drain. If the holding tank is even an inch or two below the floor it should not need a pump. ...
Yes it is weird, and its a Scamp... and the grey water tank is not an inch or two below the floor.. its above the floor, or at least the inlet is.. hence the need for the pump. Got it?
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Old 09-26-2018, 08:33 PM   #14
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The shower floor is on level with the kitchen floor.
The gray tank is on level with the raised floor of the bed/dinette.
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