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pharmboy · Feb 11, 2006, 01:43 PM

I am presently on a septic system. Thanks to a new housing development I now have a sewer line 45 feet from the house. I got the permit and have taken care of the impact fees. I know there is a min. slope when installing sewer drain but I was wandering if you can have too much slope. With my house being on a rise I have about 6feet of drop from the house to the new sewer stand pipe. A friend of mine said if you have too much slope the water will run by the solids and cause a back up. I don't know if he knows what he is talking about cause he is not a plumber.

speedball1 · Feb 11, 2006, 02:34 PM

Originally Posted by pharmboy

I am presently on a septic system. Thanks to a new housing development I now have a sewer line 45 feet from the house. I got the permit and have taken care of the impact fees. I know there is a min. slope when installing sewer drain but I was wandering if you can have to much slope. With my house being on a rise I have about 6feet of drop from the house to the new sewer stand pipe. A friend of mine said if you have to much slope the water will run by the solids and cause a back up. I don't know if he knows what he is talking about cause he is not a plumber.

Listen to your friend, he's right. Too little slope and the water won't carry the solids away. Too much slope and the water runs so fast it drops the solids behind. The correct slope is 1/4" to the foot. How we get around a drop like yours is to start from the house,after installing a cleanout, and run to the street using 1/4" to the foot slope. At 45 feet at 1/4" to the foot you will have dropped only 11 1/4" . This leaves a little over 5 feet drop to the city raiser. We connect using a 1/8th bend to get us down to the city raiser to make a connection. Thus the correct slope is maintained right up to the city sewers raiser. Good luck, Tom

pharmboy · Feb 12, 2006, 08:38 AM

I understand what you are saying as far as the 1/4 inch drop but if I apply this rule the pipe will be 5 feet out of the ground at the street. I have to stay under grade some how. Could I step it down using 45's and apply the rule on the straight pipe? I can't be the only person in Florida on a hill.

speedball1 · Feb 12, 2006, 09:45 AM

" I can't be the only person in Florida on a hill." Florida has hills?? Not in rhe Tampa Bay Area they don't. I'm sorry, I've never been faced with this problem. If I were in your shoes Iwould contact a local plumber with your concerns. He will be familiar with your area and can advise you much better then I. Regards, Tom

pharmboy · Feb 12, 2006, 11:07 AM

Thanks for your advice. I will get someone out to take a look at it. I want to do it right the first time and not have problems later.