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Old 10-05-2005, 06:10 AM   #1
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I'm building a motorhome garage and the building inspector came out yesterday to inspect the footings of the garage. He saw that we planned to put a sewage line in the garage and asked about it. My builder told him we would be empting the holding tanks of the MH into the septic tank. The inspector said oh no, the material would cause the septic tank field to clog and a connection to the septic tank would be prohibited.
I use so-called enzyme, biodegradable tabs/granules/liquid in my tanks and did not think this would cause a problem in my septic tank. Would it??
I don't want to mess up my household septic tank, but I would like to wash out my holding tanks (not empty a full load) after returning from a trip. Help! Thanks

Annie K. and Sparky the long-haired chihuahua
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Old 10-05-2005, 06:10 AM   #2
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I'm building a motorhome garage and the building inspector came out yesterday to inspect the footings of the garage. He saw that we planned to put a sewage line in the garage and asked about it. My builder told him we would be empting the holding tanks of the MH into the septic tank. The inspector said oh no, the material would cause the septic tank field to clog and a connection to the septic tank would be prohibited.
I use so-called enzyme, biodegradable tabs/granules/liquid in my tanks and did not think this would cause a problem in my septic tank. Would it??
I don't want to mess up my household septic tank, but I would like to wash out my holding tanks (not empty a full load) after returning from a trip. Help! Thanks

Annie K. and Sparky the long-haired chihuahua
03 Journey DL 36LD
04 Saturn L300 W
Brake Buddy
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Old 10-05-2005, 06:27 AM   #3
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I made the same kind of conection. Cut into the line before the tank, while having a new tank installed. I asked the people from the septic tank Co. about it and he said it would not be a problem as long as not used excessive. The amount in the tank compared to what you are dumping are min. Vet Man
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Old 10-05-2005, 07:29 AM   #4
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No problem here in SC. Still under construction, the plumber will be Y'ing off one of the drains coming out of the side of the house and tying into the septic tank.

My RV tank will be on a formaldehyde free diet from now on since it'll kill the digesting bacteria in the tank.

My tank is a 1000 gallon unit which they assure will never fill. The leaching field extends 40 to 50 feet into the back yard and it all sandy soil and they tell me there won't be any issues getting rid of the waste water since the soil is so porus.

I'm going to have a 4" threaded clean-out stubbed up next to the RV pad encased in a concrete square finished at the same height as the pad.

The elctrician finished yesterday and installed a 50A plug, 20A plug plus, CATV & Phone.

All the boxes are mounted on a 4x6 beam that's stuck 3 feet into the ground. The electrician ran all the conductors in PVC about 24" deep from an external breaker panel and low voltage pull box. The TV and Telco run in the same pipe and the 6/2 and 12/2 run in a seperate pipe. They'll backfill around the beam with concrete when they pour the driveway.
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Old 10-05-2005, 08:06 AM   #5
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I think if that were true .... clog the septic tank ... a lot of campgrounds would be in deep s..t .... excuse the pun ... His statement is rediculous and just sounds like it was a jump to a conclusion .... I know that some of the old tank stuff used formaldehyde which would cause a problem I believe
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Old 10-05-2005, 08:42 AM   #6
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We have done this on ours for years and no problem. We have had both leechfield type and Anarobic type. Your inspector does not understand the concept at all. Ask him to show you where ion his code and guidelines it prohibits attaching another toilet.

Bath and toilet waste is waste. Dumping 50 gallons of RV tank into a 500 or 1000 gallon tank will have littel to no effect on the system.

Ken
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Old 10-05-2005, 12:53 PM   #7
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<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by Doggievet:
...the building inspector came out yesterday to inspect the footings of the garage...the material would cause the septic tank field to clog and a connection to the septic tank would be prohibited. </div></BLOCKQUOTE>

Interesting a GA Building Inspector that shows up at the job site. I don't hink I've ever seen a GA Building Inspector but then the all the job sites I've been on have been in North GA. David is currently working South GA (Cordele) and he hasn't seen one either.

It shouldn't be a problem. A properly installed septic system should be able to handle a motorhome dumping it's holding tanks, even if you used the formaldehyde based chemicals. But you should at least include a clean out trap. A handy place for your clean out trap would be near your motorhome.
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Old 10-05-2005, 01:35 PM   #8
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If you tap into your septic line and have the new inlet inside a structure I suggest placing a p-trap in the line. You do not want sewer gas entering a structure. Even if the new inlet is outside you should have a trap. That is what the building inspector should have told you.

I dumped in my septic system for years and never had a problem. I did not use chemicals in my holding tank or in my septic system.
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Old 10-05-2005, 02:38 PM   #9
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Why don't you tap into your septic tank line from another location, away from your new garage?

Something ground level with a large potted shrub or fruit tree that can be moved to one side when you want to dump.

I read that you only want to rinse an empty tank and that is fine. If you ever need to dump a full load, the trick is to do it a little at a time, say, over 5-7 days. You don't want to overload a septic system.
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Old 10-05-2005, 02:57 PM   #10
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It's not that the dumping will clog the septic tank. But now if you have a 500 gallon septic and your MH can dump over 50 gallons at once it can be a problem as dumping that much at once will flush solids into the field. In that case yes it can in time clog the field. A 1000 gallon septic no more than 100 gallons at once.
A large amount dumped all at once will stir the tank, flushing out solids to the field.
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Old 10-05-2005, 04:46 PM   #11
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I doubt if 50 gallons will have an adverse effect on a 500 gallon tank. Look at most of the newer homes with garden tubs in the bath. Thes things easily hold more than 50 gallons of water and you drain that in fairly often.

Ken
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Old 10-05-2005, 07:26 PM   #12
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I had planned on the same thing, instead I ended up putting in a 330 gallon plastic tank and will have my dump go into that along with my driveway drains. It has gravel all around it etc... for drainage. Tank cost me $250.00
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Old 10-06-2005, 03:39 AM   #13
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Ken, it's not so much the 50 gallon discharge to a 500 gallon tank as it is the fact that you dump 50 gallons in seconds compared to draining the tub. . This rapid rush of liquid stirs the tank contents and washes solids into the field tile. Also for most dumping, it would be 40 to 50 gallons from each tank black and gray (close to 100 gallons total). As for newer homes with garden tubs, in our area of the country the minimum tank size is 1000 gallons and many new homes are required 1500 gallon tanks. I to dump our tanks to the septic, we have two 1000 gallons tanks in tandem. Just keep in mind for every gallon that goes into the tank an equal amount goes into the field.

<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by TXiceman:
I doubt if 50 gallons will have an adverse effect on a 500 gallon tank. Look at most of the newer homes with garden tubs in the bath.
Ken </div></BLOCKQUOTE>
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Old 10-06-2005, 04:48 AM   #14
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The MH garage I'm building is in North Carolina, where I am building a new home. The county is pretty 'sticky' about inspections, thus the building inspector supervises everything. I like the idea of the plastic holding tank and a drain field. I think I could do that.
Thanks for all the advice and suggestions,

Annie K. and Sparky the long-haired chihuahua
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